Final California 2020 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 3 - Central Coast Region

Water Body Name:	Bradley Channel
Water Body ID:	CAR3121003020021002233532
Water Body Type:	River & Stream

DECISION ID	130168	Region 3
Bradley Channel

Pollutant:	Fecal Coliform
Final Listing Decision:	Delist from 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Reason for Delisting:	Applicable WQS attained; due to change in WQS
TMDL Name:	Santa Maria River Watershed Fecal Indicator Bacteria TMDL
TMDL Project Code:	917
Date TMDL Approved by USEPA:	04/24/2013
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4 of the Listing Policy due to a change in water quality standards. The State Water Boards Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California (the ISWEBE Plan) contains two bacteria water quality objectives applicable to the REC-1 beneficial use which were adopted on August 7, 2018: where the salinity level of a waterbody is equal to or less than 1 part per thousand 95 percent or more of the time, the E. coli bacteria objective applies; and where the salinity level of a waterbody is greater than 1 part per thousand 95 percent or more of the time, the Enterococci bacteria objective applies. These objectives supersede the fecal coliform water quality objective for water contact recreation. Consequently, the fecal coliform objective for water contact recreation is no longer applicable to this waterbody and those LOEs have been removed from this decision. Therefore, this waterbody is being removed from the CWA section 303(d) List under section 4 of the Listing Policy due to a change in water quality standards. However, three lines of evidence (LOEs) are available in the administrative record to assess this pollutant and the non-contact recreation use. Therefore, this pollutant is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Three of the 36 samples exceed the water quality objective for non-contact recreation. After review of the available data and information for the non-contact recreation beneficial use, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List because applicable water quality standards for the pollutant are not being exceeded. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of the 36 samples exceed the water quality objective for non-contact recreation, and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. The Santa Maria River Watershed Fecal Indicator Bacteria TMDL has been approved by the USEPA on 4/24/2013. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the CWA section 303(d) List under section 4 of the Listing Policy due to a change in water quality standards. This water body pollutant combination should be placed in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 130168, Fecal Coliform Region 3      Bradley Channel
LOE ID:	49505
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 11 samples exceed the criterion for Coliform, Fecal.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml.
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 130168, Fecal Coliform Region 3      Bradley Channel
LOE ID:	150321
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	11
Number of Exceedances:	2
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Bradley Channel to determine beneficial use support and the results are as follows: 2 of the 11 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section 3.3.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 mL, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 mL.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): 312BCU
Temporal Representation:	The samples were collected between the days of 2013-01-08 and 2013-11-06 .
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130168, Fecal Coliform Region 3      Bradley Channel
LOE ID:	11860
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	14
Number of Exceedances:	1
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 14 samples exceed the criterion for Coliform, Fecal.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	110043	Region 3
Bradley Channel

Pollutant:	Turbidity
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Sources:	No Source Analysis Available
Expected TMDL Completion Date:	2035
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the Clean Water Act (CWA) section 303(d) List under section 4.2 of the Listing Policy. Under section 4.2 a single line of evidence is necessary to assess listing status. A total of 16 lines of evidence are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. Once summed, a total of 136 of 193 samples exceed the evaluation guideline for cold freshwater habitat (Sigler et al. 1984) and 113 of 193 samples exceed the evaluation guideline for warm freshwater habitat (Shoup, D.E. and Wahl D.H., 2009) used to interpret the water quality objectives for the aquatic life beneficial uses. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of 136 of 193 samples exceed the evaluation guideline for cold freshwater habitat and 113 of 193 samples exceed the evaluation guideline for warm freshwater habitat and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	48143
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	26
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 26 of 39 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 40 NTU or greater can cause a reduction in piscivorous fish (largemouth bass) growth due to interference with their ability to find food (Shoup, D.E. and Wahl D.H., 2009).
Guideline Reference:	The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-6/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	14439
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	18
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 18 of 20 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	13457
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	13422
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 7 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 4/12/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	49466
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 11 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Turbidities of 40 NTU or greater can cause a reduction in piscivorous fish (largemouth bass) growth due to interference with their ability to find food (Shoup, D.E. and Wahl D.H., 2009).
Guideline Reference:	The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	49476
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 11 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan)
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	181998
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Guideline Reference:	The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	183119
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 12 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	183184
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 12 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Guideline Reference:	The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	182972
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	183183
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	101
Number of Exceedances:	55
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 55 of 101 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Guideline Reference:	The Effects of Turbidity on Prey Selection by Piscivorous Largemouth Bass
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	183025
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	101
Number of Exceedances:	68
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 68 of 101 samples exceeded the water quality threshold for Turbidity.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	14452
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	18
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 18 of 20 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	13421
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 7 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 4/12/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	13441
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food.
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110043, Turbidity Region 3      Bradley Channel
LOE ID:	48142
Pollutant:	Turbidity
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	36
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 36 of 39 samples exceed the criterion for Turbidity(NTU).
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Guideline Reference:	Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-6/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110034	Region 3
Bradley Channel

Pollutant:	pH
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Sources:	No Source Analysis Available
Expected TMDL Completion Date:	2035
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the Clean Water Act section 303(d) List under sections 4.2 of the Listing Policy. Under this section, a single line of evidence is necessary to assess listing status. Forty lines of evidence are available in the administrative record to assess this pollutant. One hundred twenty-nine of the 198 samples exceed the maximum pH water quality objective for Municipal and Domestic Supply, Contact and Non-contact Recreation beneficial uses. Ninety-five of the 198 samples exceed the maximum pH water quality objectives for Cold and Warm Freshwater Habitats. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One hundred twenty-nine of the 198 samples exceed the maximum pH water quality objective for Municipal and Domestic Supply, Contact and Non-contact Recreation beneficial uses, 95 of the 198 samples exceed the maximum pH water quality objectives for Cold and Warm Freshwater Habitat and these exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	14422
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 12 of 20 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	49475
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceed the criterion for pH.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 7.0 or raised above 8.5 (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	49501
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 11 samples exceed the criterion for pH.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 6.5 or raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	14423
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	20
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 20 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	48130
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	36
Number of Exceedances:	23
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 23 of 36 samples exceed the criterion for pH.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 6.5 or raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11876
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	14
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 14 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	49506
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	11
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 11 samples exceed the criterion for pH.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11580
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11878
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	14
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 14 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	14437
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	20
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 20 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	48132
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	36
Number of Exceedances:	23
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 23 of 36 samples exceed the criterion for pH.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11581
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	48141
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 36 samples exceed the criterion for pH.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 7.0 or raised above 8.5 (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	14438
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 12 of 20 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11879
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 14 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	49465
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceed the criterion for pH.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 7.0 or raised above 8.5 (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11877
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	14
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 14 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	14436
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	20
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 20 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	49504
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	11
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 11 samples exceed the criterion for pH.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	48131
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	36
Number of Exceedances:	23
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 23 of 36 samples exceed the criterion for pH.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11579
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177616
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for warm fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177112
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	101
Number of Exceedances:	75
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 75 of 101 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177482
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	12
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 12 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	178368
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	101
Number of Exceedances:	75
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 75 of 101 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for municipal and domestic supply (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177053
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 12 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for warm fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177150
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	178998
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 12 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for cold fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177094
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for cold fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177395
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	101
Number of Exceedances:	58
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 58 of 101 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for cold fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177589
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	12
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 12 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	176812
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	101
Number of Exceedances:	58
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 58 of 101 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for warm fresh water habitat (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 7.0 nor raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	178239
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for municipal and domestic supply (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	177107
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	12
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 12 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for municipal and domestic supply (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	176701
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	101
Number of Exceedances:	75
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 75 of 101 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for water contact recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	176885
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Non-Contact Recreation
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation (Section 3.3.2 Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries) states that the pH value shall neither be depressed below 6.5 nor raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	48129
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 36 samples exceed the criterion for pH.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The pH value shall not be depressed below 7.0 or raised above 8.5 (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11577
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11875
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 14 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110034, pH Region 3      Bradley Channel
LOE ID:	11578
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for pH.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	126542	Region 3
Bradley Channel

Pollutant:	Ammonia
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture | Domestic Animals/Livestock | Natural Sources | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Nitrogen Compounds and Orthophosphate TMDL
TMDL Project Code:	1082
Date TMDL Approved by USEPA:	03/08/2016
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under sections 2.2 and 4.1 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status. Twenty-five lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Based on LOEs summarizing un-ionized ammonia data, 65 of the 142 samples exceed the water quality objective (Basin Plan) set to protect aquatic life. Based on LOEs summarizing total ammonia data (‘nitrogen, ammonia’ and ‘nitrogen as ammonia’) 23 of the 46 samples exceed the EPA's Aquatic Life Ambient Water Quality Criteria set to protect aquatic life. Based on LOEs summarizing total ammonia data (‘nitrogen, ammonia’ and ‘nitrogen as ammonia’) 1 of the 167 samples exceed the EPA's Lifetime Health advisory level set to protect municipal and domestic supply uses. Based on the readily available data and information, the weight of evidence indicates that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. However, there is sufficient justification to place it in the Being Addressed portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Sixty-five of the 142 samples for un-ionized ammonia and 23 of the 46 samples for total ammonia exceed the water quality objectives and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Total Maximum Daily Loads for Nitrogen Compounds and Orthophosphate for the Lower Santa Maria River Watershed and Tributaries to Oso Flaco Lake has been approved by the Central Coast Water Board in 2013 and approved by USEPA on March 8, 2016. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. This water body pollutant combination should be placed in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	183868
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	20
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 20 of the 39 samples exceeded the water quality threshold for Ammonia as N. Although a total of 45 samples were collected, 6 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference:	Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2010-05-25 to 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	183984
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	20
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 20 of the 39 samples exceeded the water quality threshold for Ammonia as N. Although a total of 45 samples were collected, 6 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference:	Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2010-05-25 to 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	149619
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Ammonia as N.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2012 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for a lifetime of exposure."
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	184003
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	65
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 65 samples exceeded the water quality threshold for Ammonia as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2012 edition of the drinking water standards and health advisories. This Advisory Level is defined as 'the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for a lifetime of exposure.'
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	184004
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality threshold for Ammonia as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2012 edition of the drinking water standards and health advisories. This Advisory Level is defined as 'the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for a lifetime of exposure.'
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	149620
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 3 samples exceeded the water quality standard for Ammonia as N, Unionized. 3 of these samples were estimates.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	149621
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 3 samples exceeded the water quality standard for Ammonia as N, Unionized. 3 of these samples were estimates.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	48077
Pollutant:	Ammonia as Nitrogen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	42
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 42 samples exceed the criterion for Ammonia As N, Total.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure."
Guideline Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-6/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	9882
Pollutant:	Ammonia as Nitrogen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	15
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Ammonia as N, Total.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006).
Objective/Criterion Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure."
Guideline Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	14337
Pollutant:	Ammonia as Nitrogen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	20
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Ammonia As N, Total.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006).
Objective/Criterion Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure."
Guideline Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	49487
Pollutant:	Ammonia as Nitrogen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 11 samples exceed the criterion for Ammonia As N, Total.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure."
Guideline Reference:	2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	49450
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	14402
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	21
Number of Exceedances:	11
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 11 of 21 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	48079
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	25
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 14 of 27 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 4/10/2007-3/30/2010.
Environmental Conditions:	Two samples result were reported as non-detect and the detection limit was above the guideline. Because these results are considered estimated, these samples were not used in analysis. The samples are from 6/26/07 and 7/28/09.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	9884
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive].
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	48078
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	25
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 14 of 27 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 4/10/2007-3/30/2010.
Environmental Conditions:	Two samples result were reported as non-detect and the detection limit was above the guideline. Because these results are considered estimated, these samples were not used in analysis. The samples are from 6/26/07 and 7/28/09.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	9883
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive].
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	14388
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	21
Number of Exceedances:	11
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 11 of 21 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	49460
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceed the criterion for Ammonia as N, Unionized.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) .
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	219408
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	57
Number of Exceedances:	32
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 32 of the 57 samples exceeded the water quality threshold for Ammonia as N, Unionized. Although a total of 65 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2010-04-28 to 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	219450
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceeded the water quality threshold for Ammonia as N, Unionized.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	219575
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	57
Number of Exceedances:	32
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 32 of the 57 samples exceeded the water quality threshold for Ammonia as N, Unionized. Although a total of 65 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2010-04-28 to 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	219281
Pollutant:	Ammonia (Unionized)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceeded the water quality threshold for Ammonia as N, Unionized.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin General Objective, Chapter 3, Section 3.3.2 (Objectives for all Inland Surface Waters, Enclosed Bays, and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/L (as N) in receiving waters (page 32).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	183847
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 7 samples exceeded the water quality threshold for Ammonia as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference:	Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-02-05 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126542, Ammonia Region 3      Bradley Channel
LOE ID:	183887
Pollutant:	Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 7 samples exceeded the water quality threshold for Ammonia as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference:	Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-02-05 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110008	Region 3
Bradley Channel

Pollutant:	Chlorpyrifos
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from on the section 303(d) List under section 4.1 of the Listing Policy. Under section 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Twenty-six lines of evidence are available in the administrative record to assess this pollutant. - Note -Where the fraction is none or not recorded, staff assumed that the fraction is identical to that reported for pollutants of the same name, based on the analytical method. In these cases, sample and exceedance counts are summed for the purpose of making this decision. - Note, two LOEs (53638 and 53637) summarize data from sediment pore water and the evaluation guideline is not relevant for this matrix. Therefore those LOEs were removed from and are not included in this decision. Ten of the 19 samples exceed the evaluation guideline (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005) set to protect for aquatic life beneficial uses. Zero out of 9 samples exceeded the USEPA drinking water health advisory. Two out of five sediment samples exceeded the aquatic life evaluation guideline (Amweg and Weston, 2007) and these samples are associated with toxicity. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the CWA section 303(d) List because applicable water quality standards for the pollutant are being exceeded. There is sufficient justification to place it in the Being Addressed portion of the CWA section 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Ten of the 19 water samples exceed the evaluation guideline set to protect for aquatic life beneficial uses and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Santa Maria River Watershed Toxicity and Pesticide TMDL has been approved by the USEPA on August 31, 2015. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	148639
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161513
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161438
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161451
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Chlorpyrifos.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	151809
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 2 of the 4 samples exceeded the evaluation guideline for Chlorpyrifos .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for chlorpyrifos is the median lethal concentration (LC50) of 1.77 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Amweg and Weston, 2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161395
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Chlorpyrifos. Although a total of 4 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Data for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	151934
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 2 of the 4 samples exceeded the evaluation guideline for Chlorpyrifos .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for chlorpyrifos is the median lethal concentration (LC50) of 1.77 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Amweg and Weston, 2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161351
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Chlorpyrifos. Although a total of 4 samples were collected, 2 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Data for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161356
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorpyrifos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161625
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Chlorpyrifos.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	161433
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorpyrifos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53636
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Chlorpyrifos.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for chlorpyrifos is 2 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at Jones - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The Project QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53631
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for chlorpyrifos is the median lethal concentration (LC50) of 1.77 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Amweg and Weston, 2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53632
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for chlorpyrifos is the median lethal concentration (LC50) of 1.77 ug/g and is normalized by the percentage of organic carbon in the sediment sample (Amweg and Weston, 2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	48083
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53633
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Chlorpyrifos. Three additional samples (quantified as either non-detect or detected but not quantified) were not used in this assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	15221
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	16204
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
	Final Data File used for assessment: SWAMP Sediment Chemistry Data from Region 3 Harbors, 2004
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53635
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceed the criterion for Chlorpyrifos. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for chlorpyrifos is 2 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	53634
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Chlorpyrifos. Three additional samples (quantified as either non-detect or detected but not quantified) were not used in this assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	48082
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater criterion continuous concentration to protect aquatic organisms is 0.015 ug/L (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game (with minor corrections to significant figures as described in Beaulaurier et al., 2005).
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	15220
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	148647
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110008, Chlorpyrifos Region 3      Bradley Channel
LOE ID:	16203
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Chlorpyrifos.
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
	Final Data File used for assessment: SWAMP Sediment Chemistry Data from Region 3 Harbors, 2004
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	110010	Region 3
Bradley Channel

Pollutant:	Diazinon
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under sections 4.1 and 4.6 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status. Under section 4.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the CWA section 303(d) List. Twenty lines of evidence are available in the administrative record to assess this pollutant. Note, two LOEs (53617 and 53616) summarize data from sediment pore water and the evaluation guideline is not relevant for this matrix. Therefore those LOEs were removed from and are not included in this decision. Four of 14 water samples exceed the Evaluation Guideline applied to protect for aquatic life beneficial uses. Zero of 9 water samples exceed the USEPA drinking water health advisory. The single sediment sample did not exceed the Evaluation Guideline applied to protect for aquatic life beneficial uses. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this waterbody-segment and pollutant combination from the CWA section 303(d) List. In accordance with section 2.2 of the Policy there is sufficient justification to place it in the Being Addressed portion of the CWA section 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Four of 14 water samples exceed the Evaluation Guideline applied to protect for aquatic life beneficial uses and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Santa Maria Watershed toxicity and pesticides TMDL has been approved by USEPA on August 31, 2015. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	15234
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Diazinon.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53612
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 6 samples exceed the criterion for Diazinon. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164007
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164117
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164058
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164023
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164159
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164112
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	163945
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	164130
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diazinon.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53610
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Diazinon.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for diazinon is the median lethal concentration (LC50) of 11 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 11 ug/g is the geometric mean of LC50 values for diazinon from Ding et al. (2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53609
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Diazinon.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for diazinon is the median lethal concentration (LC50) of 11 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 11 ug/g is the geometric mean of LC50 values for diazinon from Ding et al. (2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	48084
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for Diazinon.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	16856
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Diazinon.
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	15222
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Diazinon.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53613
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 6 samples exceed the criterion for Diazinon. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53614
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Diazinon.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for diazinon is 1 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at Jones - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	53615
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceed the criterion for Diazinon. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for diazinon is 1 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected over the time period 10/21/2008-8/26/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	48085
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 3 samples exceed the criterion for Diazinon.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference:	Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110010, Diazinon Region 3      Bradley Channel
LOE ID:	16857
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Diazinon.
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Evaluation Guideline:	One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	125741	Region 3
Bradley Channel

Pollutant:	Escherichia coli (E. coli)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Collection System Failure | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Fecal Indicator Bacteria TMDL
TMDL Project Code:	917
Date TMDL Approved by USEPA:	04/24/2013
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	The State Water Boards Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California (the ISWEBE Plan) contains two bacteria water quality objectives applicable to the REC-1 beneficial use, which were adopted on August 7, 2018. Because the salinity level of this waterbody is equal to or less than 1 part per thousand 95 percent or more of the time, the E. coli bacteria objective applies. Therefore, this waterbody is being considered for removal from the CWA section 303(d) List under section 4.3 of the Listing Policy, as applicable, using the E. coli objective. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. E. coli populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, indicator bacteria do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of E. coli in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address E. coli. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the CWA section 303(d) List, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. All samples are evaluated using the statistical threshold value (STV) water quality objective for water contact recreation (ISWEBE, SWRCB 2019). The water quality objective states that the STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month. Where there are more than one samples collected within any six-week period, a geomean of those samples is calculated and evaluated using the geomean water quality objective for water contact recreation (ISWEBE, SWRCB 2019). Although two lines of evidence are available in the administrative record to assess this pollutant, this decision is based upon evaluation of the E. coli data collected since 2010 (see LOE 150341) which are most representative of existing conditions in the waterbody. Nine of the eleven samples collected since 2010 exceed the water quality objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. no geomeans could be calculated. The data were collected between 2010 and 2018 and represent a range of hydrologic conditions (both wet and dry years). This sample count of data collected since 2010 is adequate to determine beneficial use support in accordance with the Listing Policy. Note, one line of evidence summarizing historic data (data collected prior to 2010) compared to the USEPA’s Ambient Water Quality Criteria for Bacteria (USEPA, 1986). Five of the 11 historic samples exceed the USEPA criteria set to protect for water contact recreation. These data are not used for making this decision. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the CWA section 303(d) List because applicable water quality standards for the pollutant are being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Nine of the eleven samples collected since 2010 exceed the water quality objective (ISWEBE, SWRCB 2019) for water contact recreation and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. The Santa Maria River Watershed Fecal Indicator Bacteria TMDL has been approved by the USEPA on April 24, 2013. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the CWA section 303(d) List because applicable water quality standards for the pollutant are being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Nine of the eleven samples collected since 2010 exceed the water quality objective (ISWEBE, SWRCB 2019) for water contact recreation and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. The Santa Maria River Watershed Fecal Indicator Bacteria TMDL has been approved by the USEPA on April 24, 2013. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 125741, Escherichia coli (E. coli) Region 3      Bradley Channel
LOE ID:	150341
Pollutant:	Escherichia coli (E. coli)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	11
Number of Exceedances:	9
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Bradley Channel to determine beneficial use support and the results are as follows: 9 of the 11 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The bacteria water quality objective applicable to all non-saline waters, is a Statistical Threshold Value (STV) of 320 cfu/100 mL. The applicable STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner (ISWEBE 2018).
Objective/Criterion Reference:	Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): 312BCU
Temporal Representation:	The samples were collected between the days of 2013-01-08 and 2013-11-06 .
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 125741, Escherichia coli (E. coli) Region 3      Bradley Channel
LOE ID:	49503
Pollutant:	Escherichia coli (E. coli)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	11
Number of Exceedances:	5
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 5 of 11 samples exceed the criterion for Escherichia coli.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	USEPA Ambient Water Quality Criteria for Bacteria -1986.
Objective/Criterion Reference:	Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
Evaluation Guideline:	Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15 of the USEPA Ambient Water Quality Criteria for Bacteria -1986).
Guideline Reference:	Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

DECISION ID	110023	Region 3
Bradley Channel

Pollutant:	Malathion
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Twenty-one lines of evidence are available in the administrative record to assess this pollutant. For lines of evidence where the fraction is “not recorded” staff assumed that the fraction is “total” and the sample and exceedance counts are summed for the purpose of making this decision. Seven of 17 samples exceed the evaluation guideline applied to protect aquatic life beneficial uses (Faria et al., 2010). This sample size is sufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating of "not supporting". Zero of 17 samples exceed the evaluation guideline applied to protect the municipal and domestic water supply beneficial use (USEPA drinking water health advisory). This sample size is sufficient to determine the applicable beneficial use support rating of "fully supporting". A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. In accordance with section 2.2 of the Policy, there is sufficient justification it to remain on the Being Addressed portion of the 303(d) list because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Seven of 17 water samples exceed the aquatic life evaluation guideline and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Santa Maria Watershed Toxicity and Pesticides TMDL has been approved by the USEPA on August 31, 2015. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. Furthermore, this pollutant waterbody combination should be placed in the 'Being Addressed' portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53667
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: One of three samples exceed the criterion for Malathion.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data, following the QAPP for that program and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53669
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Malathion.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53671
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Malathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53665
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Malathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53664
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Malathion.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53663
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Malathion.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53666
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: One of three samples exceed the criterion for Malathion.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53670
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Malathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	53668
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Malathion.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion does not exceed 0.028 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168441
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 4 samples exceeded the water quality threshold for Malathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	169025
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168391
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168652
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 4 samples exceeded the water quality threshold for Malathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	169079
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 5 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168549
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168889
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168497
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 5 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168955
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168864
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Malathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for malathion is 500 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	169073
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110023, Malathion Region 3      Bradley Channel
LOE ID:	168865
Pollutant:	Malathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Malathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of malathion does not exceed 0.028 ug/L more than once every three years on the average (Faria et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	121597	Region 3
Bradley Channel

Pollutant:	Nitrate
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture | Domestic Animals/Livestock | Natural Sources | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Nitrogen Compounds and Orthophosphate TMDL
TMDL Project Code:	1082
Date TMDL Approved by USEPA:	03/08/2016
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and 4.1 of the Listing Policy. Under section 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Twenty-five lines of evidence are available in the administrative record to assess this pollutant. Lines of evidence for the pollutant name Nitrate and for the pollutant name Nitrogen, Nitrate are combined and sample and exceedance counts are summed for the purpose of making this decision. Further, Where the fraction is none or not recorded, staff assumed that the fraction is the same as those data reported with a fraction, based on the analytical method and sample and exceedance counts are summed for the purpose of making this decision. A total of 32 of the 53 nitrate samples exceeded the water quality objective for Municipal and Domestic Supply. For the samples reported as nitrate/nitrite, and where the fraction for nitrate/nitrite is none or not recorded, staff assumed that the fraction is dissolved, based on the analytical method and sample and exceedance counts are summed for the purpose of making this decision. A total of 133 of the 162 nitrate/nitrite samples exceed the water quality objectives for the Municipal and Domestic Supply beneficial use. In addition, 144 of the 146 nitrate/nitrite samples exceed the evaluation guideline (Central Coast Region Technical Report, 2010) for Cold and Warm Freshwater Habitat. In addition, the following evidence supports the conclusion that nitrate contributes to or causes a bio-stimulatory effect in this water segment. 1) Dissolved oxygen for this water body ranged from 0.8 mg/L to 22.2 mg/L, exceeding (falling below) the Cold Freshwater Habitat water quality objective of 7.0 mg/L. In addition, this waterbody frequently exceeds the upper dissolved oxygen screening of 13.0 mg/L (R3 NNE Technical Report, 2010). 2) Floating algal mats ranged from 0 to 100% cover, at times exceeding the screening threshold of 50% (R3 NNE Technical Report, 2010). 3) Water column chlorophyll a concentration ranged from 0 ug/L to 170 ug/L, frequently exceeding the screening threshold of 15 ug/L (R3 NNE Technical Report, 2010). Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of 32 of the 53 nitrate and 133 of the 162 nitrate/nitrite samples exceeded the water quality objective for Municipal and Domestic Supply. In addition, 144 of the 146 nitrate/nitrite samples exceed the evaluation guideline for Cold and Warm Freshwater Habitats. These exceed the allowable frequency listed in Table 4.1 of the Listing Policy and in accordance with section 4.11 of the Listing Policy, there is evidence in support of the conclusion that nitrate contributes to or causes a bio stimulatory effect in this water segment. 4. The Santa Maria River Watershed Nutrients TMDL has been approved by USEPA on March 8, 2016. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:	This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of 32 of the 53 nitrate and 133 of the 162 nitrate/nitrite samples exceeded the water quality objective for Municipal and Domestic Supply. In addition, 144 of the 146 nitrate/nitrite samples exceed the evaluation guideline for Cold and Warm Freshwater Habitats. These exceed the allowable frequency listed in Table 4.1 of the Listing Policy and in accordance with section 4.11 of the Listing Policy, there is evidence in support of the conclusion that nitrate contributes to or causes a bio stimulatory effect in this water segment. 4. The Santa Maria River Watershed Nutrients TMDL has been approved by USEPA on March 8, 2016. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	172141
Pollutant:	Nitrogen, Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	11
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 11 of 11 samples exceeded the water quality threshold for Nitrate as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	27863
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	14
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data for this assessment unit was collected by one monitoring project: CCAMP Santa Maria (SantaMaria)
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	27861
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data for this assessment unit was collected by one monitoring project: CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth)
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/29/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49472
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	10
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 10 of 11 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48112
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	39
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 39 of 39 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49490
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	8
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 8 of 11 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	15216
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	16
Number of Exceedances:	13
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 13 of 16 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	OEHHA public Health Goals for Nitrate and Nitrogen in Drinking Water (December 1997). Page 6.
Objective/Criterion Reference:	Public health goals for nitrate and nitrite in drinking water
Evaluation Guideline:	OEHHA Public Health Goal states that sum of the concentration of nitrate + nitrite shall not exceed 10 mg/L (NO3+NO2 expressed as N).
Guideline Reference:	Public health goals for nitrate and nitrite in drinking water
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 3/22/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48113
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	39
Number of Exceedances:	29
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 29 of 39 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49453
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	10
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 10 of 11 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48114
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	39
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 39 of 39 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48099
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 12 of 12 samples exceed the criterion for Nitrate as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 10/29/2008-12/9/2009.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	27860
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	5
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data for this assessment unit was collected by one monitoring project: CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth)
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/29/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48097
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 12 of 12 samples exceed the criterion for Nitrate as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 10/29/2008-12/9/2009.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49462
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	10
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 10 of 11 samples exceed the criterion for Nitrate as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	27862
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	14
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Data for this assessment unit was collected by one monitoring project: CCAMP Santa Maria (SantaMaria)
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	14336
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 5 samples exceed the criterion for Nitrate as N.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/29/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	9592
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	15
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 15 samples exceed the criterion for Nitrate as N.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49489
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	7
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 7 of 11 samples exceed the criterion for Nitrate as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	48098
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	12
Number of Exceedances:	7
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 7 of 12 samples exceed the criterion for Nitrate as N.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 10/29/2008-12/9/2009.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	49452
Pollutant:	Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	10
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 10 of 11 samples exceed the criterion for Nitrate as N.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	171869
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	93
Number of Exceedances:	92
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 92 of 93 samples exceeded the water quality threshold for Nitrate + Nitrite as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	149622
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	171662
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	93
Number of Exceedances:	92
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 92 of 93 samples exceeded the water quality threshold for Nitrate + Nitrite as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	171788
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	93
Number of Exceedances:	81
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 81 of 93 samples exceeded the water quality threshold for Nitrate + Nitrite as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for nitrate + nitrite (as N) is 10. mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-08-29
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	149623
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 3 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for nitrate + nitrite (as N) is 10. mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	149624
Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference:	CMP water quality data 10/17/2018--12/20/2018.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	Data were collected from 1 station. Station Code(s): 312BCJ
Temporal Representation:	Data for this waterbody were collected between 2018-10-18 and 2018-12-17
Environmental Conditions:
QAPP Information:	Data was collected verified in accordance with the Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program,
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	172573
Pollutant:	Nitrogen, Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	11
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 11 of 11 samples exceeded the water quality threshold for Nitrate as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N.
Guideline Reference:	Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 121597, Nitrate Region 3      Bradley Channel
LOE ID:	172301
Pollutant:	Nitrogen, Nitrate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	11
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 11 of 11 samples exceeded the water quality threshold for Nitrate as N.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for nitrate (as N) 10.0 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110041	Region 3
Bradley Channel

Pollutant:	Toxicity
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	Agriculture | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) List under sections 2.2, 4.1 and 4.6 of the Listing Policy. Under 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Thirty-seven lines of evidence are available in the administrative record to assess this pollutant. One sample can have multiple toxicity test results (or endpoints) but will be counted only once. One sample is defined as being collected on the same day at the same location. Twenty-three LOEs summarize water samples. Thirty-nine out of 50 were toxic to test organisms (exhibited a significant increase in mortality, decrease in cell density, decrease in growth or reproduction compared to the laboratory control) and therefore exceeded the narrative general water quality objective for toxicity, set to protect for aquatic life beneficial uses. Fourteen LOEs summarize sediment samples. Fifteen out of 15 samples were toxic to test organisms (exhibited a significant increase in mortality, decrease in cell density, decrease in growth or reproduction compared to the laboratory control) and therefore exceeded the narrative general water quality objective for toxicity, set to protect for aquatic life beneficial uses. Based on the readily available data and information, the weight of evidence indicates that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Thirty-nine out of 50 water samples, and fifteen out of 15 sediment samples, were toxic to test organisms relative to the control and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The TMDL for toxicity and pesticides in the Santa Maria River Watershed has been approved by the USEPA on August 31, 2015. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) List because applicable water quality standards for the pollutant are being exceeded. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23709
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 5/16/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23688
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Ceriodaphnia dubia Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23687
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 7 of 7 samples exceed the criterion for Toxicity, Ceriodaphnia dubia Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 3/22/2005-9/27/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23689
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Ceriodaphnia dubia Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23726
Pollutant:	Plant Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceed the criterion for Toxicity, Selenastrum capricornutum Growth (Cell Density) 4 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction in cell count of test organism relative to the control (alpha < 0.05) and cell count <80% of control.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23728
Pollutant:	Plant Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Selenastrum capricornutum Growth (Cell Density) 4 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction in cell count of test organism relative to the control (alpha < 0.05) and cell count <80% of control.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23729
Pollutant:	Plant Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Selenastrum capricornutum Growth (Cell Density) 4 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction in cell count of test organism relative to the control (alpha < 0.05) and cell count <80% of control.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	149025
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Salinas Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia, for Young/female, Selenastrum capricornutum, for Total Cell Count, Ceriodaphnia dubia, for Survival
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2019-02-26 and 2019-02-26.
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148604
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP SpecialStudies for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Chironomus dilutus, for Survival, Chironomus dilutus, for Ash Free Dry Mass, Ceriodaphnia dubia, for Survival, Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148595
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Selenastrum capricornutum, for Total Cell Count, Ceriodaphnia dubia, for Young/female, Ceriodaphnia dubia, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148638
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Selenastrum capricornutum, for Total Cell Count, Ceriodaphnia dubia, for Young/female, Ceriodaphnia dubia, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53745
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53656
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53657
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	78944
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	78943
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	78945
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53746
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate water toxicity. The sample exhibited significant toxicity to Ceriodaphnia dubia. The toxicity test included survival and reproduction of Ceriodaphnia dubia, survival and biomass of Pimephales promelas, and total cell count of Selenastrum capricornutum. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at station 312BCUxxx.
Temporal Representation:	The samples were collected in June 2007.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53744
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	10
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Eleven samples were collected to evaluate water toxicity. Ten of the 11 samples exhibited significant toxicity. The toxicity tests for the samples included survival and reproduction of Ceriodaphnia dubia, Pimephales promelas survival and growth, Selenastrum capricornutum growth and Hyalella azteca growth. The eleven samples exhibited significant toxicity to Ceriodaphnia dubia reproduction and survival(1/23/08-1/20/10), Pimephales promelas survival and growth (10/23/07-1/20/10), and Selanastrum capricornutum growth (3/30/10).
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. A statistical test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from February 2007 to March 2010.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	53743
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	5
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Six samples were collected to evaluate water toxicity. Five of the six samples exhibited significant toxicity. The toxicity tests included survival of Ceriodaphnia dubia. Statistically significant effects on Ceriodaphnia dubia were observed in five samples 10/21/2008, 3/3/2009, 3/31/2009, 6/10/2009, 8/26/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Guideline Reference:	Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in October and December of 2008 and February, March, June and August of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23724
Pollutant:	Vertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Pimephales promelas Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23695
Pollutant:	Vertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Toxicity, Pimephales promelas Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 3/22/2005-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23725
Pollutant:	Vertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Pimephales promelas Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: SWAMP Toxicity Data 2001-06
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected on a single day 2/27/2007. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23723
Pollutant:	Vertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Toxicity, Pimephales promelas Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 3/22/2005-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23727
Pollutant:	Plant Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceed the criterion for Toxicity, Selenastrum capricornutum Growth (Cell Density) 4 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction in cell count of test organism relative to the control (alpha < 0.05) and cell count <80% of control.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23710
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 4/20/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23708
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 5/16/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23711
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 4/20/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148698
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	21
Number of Exceedances:	13
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	13 of the 21 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Chironomus dilutus, for Survival, Ceriodaphnia dubia, for Survival, Ceriodaphnia dubia, for Young/female, Selenastrum capricornutum, for Total Cell Count, Pimephales promelas, for Biomass (wt/orig indiv), Pimephales promelas, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148647
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148835
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Salinas Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia, for Young/female, Selenastrum capricornutum, for Total Cell Count, Ceriodaphnia dubia, for Survival
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2019-02-26 and 2019-02-26.
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148639
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148582
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	21
Number of Exceedances:	13
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	13 of the 21 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Chironomus dilutus, for Survival, Ceriodaphnia dubia, for Survival, Ceriodaphnia dubia, for Young/female, Selenastrum capricornutum, for Total Cell Count, Pimephales promelas, for Biomass (wt/orig indiv), Pimephales promelas, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	148605
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP SpecialStudies for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Chironomus dilutus, for Survival, Chironomus dilutus, for Ash Free Dry Mass, Ceriodaphnia dubia, for Survival, Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110041, Toxicity Region 3      Bradley Channel
LOE ID:	23686
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 7 of 7 samples exceed the criterion for Toxicity, Ceriodaphnia dubia Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street].
Temporal Representation:	Data was collected over the time period 3/22/2005-9/27/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	110024	Region 3
Bradley Channel

Pollutant:	2,4,6-Trichlorophenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110024, 2,4,6-Trichlorophenol Region 3      Bradley Channel
LOE ID:	183369
Pollutant:	2,4,6-Trichlorophenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Trichlorophenol, 2,4,6-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2, 4, 6-Trichlorophenol criteria for the protection of human health from the consumption of water and organisms is 2.1 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110027	Region 3
Bradley Channel

Pollutant:	2,4-Dichlorophenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110027, 2,4-Dichlorophenol Region 3      Bradley Channel
LOE ID:	164041
Pollutant:	2,4-Dichlorophenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dichlorophenol, 2,4-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2, 4-Dichlorophenol criteria for the protection of human health from the consumption of water and organisms is 93 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110028	Region 3
Bradley Channel

Pollutant:	2,4-Dimethylphenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110028, 2,4-Dimethylphenol Region 3      Bradley Channel
LOE ID:	164815
Pollutant:	2,4-Dimethylphenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dimethylphenol, 2,4-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2, 4-Dimethylphenol criteria for the protection of human health from the consumption of water and organisms is 540 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110030	Region 3
Bradley Channel

Pollutant:	2,4-Dinitrophenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110030, 2,4-Dinitrophenol Region 3      Bradley Channel
LOE ID:	165007
Pollutant:	2,4-Dinitrophenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dinitrophenol, 2,4-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2, 4-Dinitrophenol criteria for the protection of human health from the consumption of water and organisms is 70 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110036	Region 3
Bradley Channel

Pollutant:	2-Chlorophenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110036, 2-Chlorophenol Region 3      Bradley Channel
LOE ID:	160964
Pollutant:	2-Chlorophenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Chlorophenol, 2-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2-Chlorophenol criteria for the protection of human health from the consumption of water and organisms is 120 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110081	Region 3
Bradley Channel

Pollutant:	Abamectin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110081, Abamectin Region 3      Bradley Channel
LOE ID:	157036
Pollutant:	Abamectin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Abamectin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Abamectin is the USEPA Aquatic Life Benchmark of 0.17 ug/L for an invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110081, Abamectin Region 3      Bradley Channel
LOE ID:	157035
Pollutant:	Abamectin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Abamectin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Abamectin is the USEPA Aquatic Life Benchmark of 0.17 ug/L for an invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110062	Region 3
Bradley Channel

Pollutant:	Aldicarb
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110062, Aldicarb Region 3      Bradley Channel
LOE ID:	157145
Pollutant:	Aldicarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aldicarb.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 0.46 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-03-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110062, Aldicarb Region 3      Bradley Channel
LOE ID:	157320
Pollutant:	Aldicarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aldicarb.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 0.46 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-03-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110001	Region 3
Bradley Channel

Pollutant:	Arsenic
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the CWA section 303(d) List. A total of seven lines of evidence are available in the administrative record to assess this pollutant. For the water matrix, a total of zero of one sample exceeds the dissolved fraction water quality objective and zero of zero samples exceed the total fraction water quality objective for the cold freshwater habitat beneficial use, zero of one sample exceeds the dissolved fraction evaluation guideline and zero of eight samples exceed the total fraction evaluation guideline for the municipal and domestic supply beneficial use and zero of one sample exceeds the dissolved fraction water quality objective and zero of zero samples exceed the total fraction water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. These data are insufficient to determine the applicable beneficial use support rating with the power and confidence required by the Listing Policy. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. For the water matrix, a total of zero of one sample exceeds the dissolved fraction water quality objective and zero of zero samples exceed the total fraction water quality objective for the cold freshwater habitat beneficial use, zero of one sample exceeds the dissolved fraction evaluation guideline and zero of eight samples exceed the total fraction evaluation guideline for the municipal and domestic supply beneficial use and zero of one sample exceeds the dissolved fraction water quality objective and zero of zero samples exceed the total fraction water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	158074
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Arsenic.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Arsenic is 10 ug/L.
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	151397
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for arsenic is 33 mg/Kg dry weight (MacDonald et al. 2000a).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	151295
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for arsenic is 33 mg/Kg dry weight (MacDonald et al. 2000a).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	158347
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration for dissolved arsenic in freshwater is 0.150 mg/L. (California Toxics Rule, 2000)
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2018-01-09 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	158072
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration for dissolved arsenic in freshwater is 0.150 mg/L. (California Toxics Rule, 2000)
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2018-01-09 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	158280
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Arsenic is 10 ug/L.
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2018-01-09 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110001, Arsenic Region 3      Bradley Channel
LOE ID:	158453
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Arsenic is 10 ug/L.
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110002	Region 3
Bradley Channel

Pollutant:	Atrazine
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of three lines of evidence are available in the administrative record to assess this pollutant. A total of zero of five samples exceed the evaluation guideline for the cold freshwater habitat beneficial use; zero of five samples exceed the evaluation guideline for the municipal and domestic supply beneficial use; and zero of five samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of five samples exceed the evaluation guideline for the cold freshwater habitat beneficial use, zero of five samples exceed the evaluation guideline for the municipal and domestic supply beneficial use, and zero of five samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110002, Atrazine Region 3      Bradley Channel
LOE ID:	158542
Pollutant:	Atrazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Atrazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Atrazine is 1 ug/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110002, Atrazine Region 3      Bradley Channel
LOE ID:	158526
Pollutant:	Atrazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Atrazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of <1 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110002, Atrazine Region 3      Bradley Channel
LOE ID:	158712
Pollutant:	Atrazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Atrazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of <1 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110019	Region 3
Bradley Channel

Pollutant:	Azinphos-methyl (Guthion)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Zero of the 10 samples did not exceed the evaluation guideline (National Recommended Water Quality Criteria, 2009) used to interpret the narrative water quality objective for aquatic life. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 10 samples did not exceed the evaluation guideline (National Recommended Water Quality Criteria, 2009) used to interpret the narrative water quality objective for aquatic life and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	53624
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Azinphos Methyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Azinphos methyl (Guthion) criteria for the protection of freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, 2009).
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	158571
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Azinphos Methyl. Although a total of 5 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2013-03-28 to 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	158756
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	53623
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Azinphos Methyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Azinphos methyl (Guthion) criteria for the protection of freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, 2009).
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	158739
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Azinphos Methyl. Although a total of 5 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2013-03-28 to 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110019, Azinphos-methyl (Guthion) Region 3      Bradley Channel
LOE ID:	158528
Pollutant:	Azinphos-methyl (Guthion)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 0.01 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110079	Region 3
Bradley Channel

Pollutant:	Azoxystrobin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110079, Azoxystrobin Region 3      Bradley Channel
LOE ID:	158946
Pollutant:	Azoxystrobin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Azoxystrobin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Azoxystrobin is the USEPA Aquatic Life Benchmark of 44 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110079, Azoxystrobin Region 3      Bradley Channel
LOE ID:	158994
Pollutant:	Azoxystrobin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Azoxystrobin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Azoxystrobin is the USEPA Aquatic Life Benchmark of 44 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110082	Region 3
Bradley Channel

Pollutant:	Bensulide
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of eight samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of eight samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110082, Bensulide Region 3      Bradley Channel
LOE ID:	158929
Pollutant:	Bensulide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Bensulide.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Bensulide is the USEPA Aquatic Life Benchmark of 11 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110082, Bensulide Region 3      Bradley Channel
LOE ID:	158977
Pollutant:	Bensulide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Bensulide.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Bensulide is the USEPA Aquatic Life Benchmark of 11 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110003	Region 3
Bradley Channel

Pollutant:	Cadmium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Nine lines of evidence are available in the administrative record to assess this pollutant. Zero of 7 water samples exceed the evaluation guidelines used to interpret the narrative water quality objective for aquatic life protection, zero of 9 water samples exceed the evaluation guidelines used for protection of municipal or domestic water supply, and zero of 1 sediment samples exceed the evaluation guidelines used to interpret the narrative water quality objective for aquatic habitat beneficial uses. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support ratings are set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 7 water samples exceed the evaluation guidelines used to interpret the narrative water quality objective for aquatic life protection, zero of 9 water samples exceed the evaluation guidelines used for protection of municipal or domestic water supply, and zero of 1 sediment samples exceed the evaluation guidelines used to interpret the narrative water quality objective for aquatic habitat beneficial uses and these sample sizes are insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 16 samples is needed for application of table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159878
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for cadmium is 0.005 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	151730
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for cadmium in 4.98 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159398
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159615
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159494
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for cadmium is 0.005 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159449
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	151710
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for cadmium in 4.98 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159616
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for cadmium is 0.005 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110003, Cadmium Region 3      Bradley Channel
LOE ID:	159352
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110004	Region 3
Bradley Channel

Pollutant:	Carbaryl
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160379
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 2.1 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160694
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 2.1 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160622
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for carbaryl is 40 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160324
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 2.1 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160764
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for carbaryl is 40 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110004, Carbaryl Region 3      Bradley Channel
LOE ID:	160741
Pollutant:	Carbaryl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbaryl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Criterion Continuous Concentration for freshwater aquatic life is 2.1 ug/L (National Recommended Water Quality Criteria, EPA 2016)
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110005	Region 3
Bradley Channel

Pollutant:	Carbofuran
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110005, Carbofuran Region 3      Bradley Channel
LOE ID:	160629
Pollutant:	Carbofuran
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbofuran.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Carbofuran is the USEPA Aquatic Life Benchmark of 0.75 ug/L for an invertibrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110005, Carbofuran Region 3      Bradley Channel
LOE ID:	160610
Pollutant:	Carbofuran
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbofuran.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Carbofuran is 0.018 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110005, Carbofuran Region 3      Bradley Channel
LOE ID:	160532
Pollutant:	Carbofuran
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Carbofuran.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Carbofuran is the USEPA Aquatic Life Benchmark of 0.75 ug/L for an invertibrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110063	Region 3
Bradley Channel

Pollutant:	Carbophenothion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110063, Carbophenothion Region 3      Bradley Channel
LOE ID:	160499
Pollutant:	Carbophenothion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Carbophenothion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Carbophenothion (Trithion) is 0.007 mg/L.
Guideline Reference:	CDPH Archived Advisory Levels for Drinking Water. Archived Advisory Levels are currently considered Notification Levels.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110006	Region 3
Bradley Channel

Pollutant:	Chlordane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity. Six lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Zero of the three sediment samples exceeded the evaluation guideline for Cold and Warm Freshwater Habitats. This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero sediment samples exceed the evaluation guidelines for aquatic life protection and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	151617
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chlordane .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Chlordane from MacDonald et al., 2000a which states that the probable effect concentration for Chlordane is 17.6 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	151822
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chlordane .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Chlordane from MacDonald et al., 2000a which states that the probable effect concentration for Chlordane is 17.6 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	53630
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlordane, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for Chlordane is 17.6 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	151904
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chlordane .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Chlordane from MacDonald et al., 2000a which states that the probable effect concentration for Chlordane is 17.6 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	152049
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chlordane .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Chlordane from MacDonald et al., 2000a which states that the probable effect concentration for Chlordane is 17.6 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110006, Chlordane Region 3      Bradley Channel
LOE ID:	53629
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlordane, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for Chlordane is 17.6 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	110070	Region 3
Bradley Channel

Pollutant:	Chromium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110070, Chromium Region 3      Bradley Channel
LOE ID:	161919
Pollutant:	Chromium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for total chromium is 0.05 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110070, Chromium Region 3      Bradley Channel
LOE ID:	152023
Pollutant:	Chromium
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for chromium in 111 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110070, Chromium Region 3      Bradley Channel
LOE ID:	152019
Pollutant:	Chromium
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for chromium in 111 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110076	Region 3
Bradley Channel

Pollutant:	Clothianidin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110076, Clothianidin Region 3      Bradley Channel
LOE ID:	162193
Pollutant:	Clothianidin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Clothianidin.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Clothianidin is the USEPA Aquatic Life Benchmark of 0.05 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-09-26 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110076, Clothianidin Region 3      Bradley Channel
LOE ID:	162263
Pollutant:	Clothianidin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Clothianidin.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Clothianidin is the USEPA Aquatic Life Benchmark of 0.05 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-09-26 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110009	Region 3
Bradley Channel

Pollutant:	Copper
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. A total of nine lines of evidence are available in the administrative record to assess this pollutant. For the water matrix, a total of one of 18 samples exceed the water quality objective for the cold freshwater habitat beneficial use, zero of seven samples exceed the dissolved fraction water quality objective and zero of 18 samples exceed the total fraction water quality objective for the municipal and domestic supply beneficial use and one of 18 samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. For the water matrix, a total of one of 18 samples exceed the water quality objective for the cold freshwater habitat beneficial use, zero of seven samples exceed the dissolved fraction water quality objective and zero of 18 samples exceed the total fraction water quality objective for the municipal and domestic supply beneficial use and one of 18 samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162344
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Copper criteria for the protection of human health from the consumption of water and organisms is 1.300 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162294
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162249
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 11 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162552
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 11 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162060
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The Copper criteria for the protection of human health from the consumption of water and organisms is 1.300 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	152381
Pollutant:	Copper
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for copper in 149 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162245
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	152233
Pollutant:	Copper
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for copper in 149 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110009, Copper Region 3      Bradley Channel
LOE ID:	162059
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Copper.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Copper criteria for the protection of human health from the consumption of water and organisms is 1.300 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110078	Region 3
Bradley Channel

Pollutant:	Coumaphos
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110078, Coumaphos Region 3      Bradley Channel
LOE ID:	163338
Pollutant:	Coumaphos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Coumaphos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Coumaphos is the USEPA Aquatic Life Benchmark of 0.037 ug/L for invertabretes (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110078, Coumaphos Region 3      Bradley Channel
LOE ID:	163421
Pollutant:	Coumaphos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Coumaphos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Coumaphos is the USEPA Aquatic Life Benchmark of 0.037 ug/L for invertabretes (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110057	Region 3
Bradley Channel

Pollutant:	Cyanazine
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110057, Cyanazine Region 3      Bradley Channel
LOE ID:	163171
Pollutant:	Cyanazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Cyanazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyanazine is the EC50 of 4.8 ug/L for Navicula pelliculosa (freshwater diatom) (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110057, Cyanazine Region 3      Bradley Channel
LOE ID:	163386
Pollutant:	Cyanazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Cyanazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyanazine is the EC50 of 4.8 ug/L for Navicula pelliculosa (freshwater diatom) (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110067	Region 3
Bradley Channel

Pollutant:	Cyfluthrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Ten lines of evidence are available in the administrative record to assess this pollutant. Zero of 6 sediment samples exceed the evaluation guideline and zero of zero water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	152363
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the evaluation guideline for Cyfluthrin, total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	152301
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the evaluation guideline for Cyfluthrin, total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	163414
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of cyfluthrin does not exceed 0.00005 ug/L (0.05 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	152177
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	152594
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	53639
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyfluthrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	53640
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyfluthrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	53642
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Cyfluthrin. The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of cyfluthrin does not exceed 0.00005 ug/L and if the 1-h average concentration does not exceed 0.0003 ug/L. For this assessment the 4-day average guideline was used. Mixtures of cyfluthrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	53641
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Cyfluthrin. The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of cyfluthrin does not exceed 0.00005 ug/L and if the 1-h average concentration does not exceed 0.0003 ug/L. For this assessment the 4-day average guideline was used. Mixtures of cyfluthrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110067, Cyfluthrin Region 3      Bradley Channel
LOE ID:	163253
Pollutant:	Cyfluthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of cyfluthrin does not exceed 0.00005 ug/L (0.05 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110069	Region 3
Bradley Channel

Pollutant:	Cyhalothrin, Lambda
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Ten lines of evidence are available in the administrative record to assess this pollutant. Zero of five sediment samples exceed the evaluation guideline and zero of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	152467
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	53644
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyhalothrin, Lambda, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	53643
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyhalothrin, Lambda, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	53646
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyhalothrin, lambda, total. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Cyhalothrin, lambda, total does not exceed 0.0005 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	53645
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cyhalothrin, lambda, total. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Cyhalothrin, lambda, total does not exceed 0.0005 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	152630
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	167509
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of lambda-cyhalothrin does not exceed 0.0005 ug/L (0.5 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	152533
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	167470
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of lambda-cyhalothrin does not exceed 0.0005 ug/L (0.5 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110069, Cyhalothrin, Lambda Region 3      Bradley Channel
LOE ID:	152542
Pollutant:	Cyhalothrin, Lambda
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110052	Region 3
Bradley Channel

Pollutant:	Cypermethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Eleven lines of evidence are available in the administrative record to assess this pollutant. One of seven sediment samples exceed the evaluation guideline and that sample (also tested for toxicity to invertebrates) resulted in significant toxic effects. Zero of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. However, the sediment and water sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	53745
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	152955
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	53648
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Cypermethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	53647
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Cypermethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	53650
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Cypermethrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Cypermethrin; Cypermethrin, total does not exceed 0.0002 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	53649
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Cypermethrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Cypermethrin; Cypermethrin, total does not exceed 0.0002 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	163558
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of cypermethrin does not exceed 0.0002 ug/L (0.2 ng/L) more than once every three years on the average (Fojut et al. ,2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	152818
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	152956
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the evaluation guideline for Cypermethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	152798
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the evaluation guideline for Cypermethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al. (2002).
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110052, Cypermethrin Region 3      Bradley Channel
LOE ID:	163796
Pollutant:	Cypermethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of cypermethrin does not exceed 0.0002 ug/L (0.2 ng/L) more than once every three years on the average (Fojut et al. ,2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110083	Region 3
Bradley Channel

Pollutant:	Cyprodinil
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110083, Cyprodinil Region 3      Bradley Channel
LOE ID:	163562
Pollutant:	Cyprodinil
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cyprodinil.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Cyprodinil is the USEPA Aquatic Life Benchmark of 8.2 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110083, Cyprodinil Region 3      Bradley Channel
LOE ID:	163543
Pollutant:	Cyprodinil
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cyprodinil.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Cyprodinil is the USEPA Aquatic Life Benchmark of 8.2 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	130036	Region 3
Bradley Channel

Pollutant:	DDD (Dichlorodiphenyldichloroethane)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the 303(d) List. Six lines of evidence are available in the administrative record to assess this pollutant. Six LOEs summarize sediment samples. One of three sediment samples exceed the DDD evaluation guideline (MacDonald et al., 2000a) set to protect for aquatic life beneficial uses. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of three sediment samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	152964
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDD (Dichlorodiphenyldichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDD from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDD is 28 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	152867
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDD (Dichlorodiphenyldichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDD from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDD is 28 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	152843
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDD (Dichlorodiphenyldichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDD from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDD is 28 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	153060
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDD (Dichlorodiphenyldichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDD from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDD is 28 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	53651
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDD.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDD is 28.0 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 130036, DDD (Dichlorodiphenyldichloroethane) Region 3      Bradley Channel
LOE ID:	53652
Pollutant:	DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDD.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDD is 28.0 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	129581	Region 3
Bradley Channel

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under section 3.1 and section 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the 303(d) List. Twelve lines of evidence are available in the administrative record to assess this pollutant. Note that this decision combines the pollutant ‘DDT’ and ‘total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD).’ Twelve LOEs summarize sediment samples. Zero of three sediment sample exceeds the DDT evaluation guideline (MacDonald et al., 2000a) set to protect for aquatic life beneficial uses. Zero of three sediment sample exceeds the total DDT evaluation guideline (MacDonald et al., 2000a) set to protect for aquatic life beneficial uses. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. No sediment samples exceeded the evaluation guidelines set to protect aquatic life beneficial uses and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	53737
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDT, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for total DDTs is 572 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	53655
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDT.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDT is 62.9 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	53598
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDT.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDT is 62.9 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	155549
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Total DDTs from MacDonald et al., 2000a which states that the probable effect concentration for Total DDTs is 572 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	155944
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Total DDTs from MacDonald et al., 2000a which states that the probable effect concentration for Total DDTs is 572 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	153194
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDT (Dichlorodiphenyltrichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDT from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDT is 62.9 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	155837
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Total DDTs from MacDonald et al., 2000a which states that the probable effect concentration for Total DDTs is 572 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	53736
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for DDT, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for total DDTs is 572 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	153076
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDT (Dichlorodiphenyltrichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDT from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDT is 62.9 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	153056
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDT (Dichlorodiphenyltrichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDT from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDT is 62.9 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	153169
Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for DDT (Dichlorodiphenyltrichloroethane) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDT from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDT is 62.9 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 129581, DDT (Dichlorodiphenyltrichloroethane) Region 3      Bradley Channel
LOE ID:	155902
Pollutant:	Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Total DDTs from MacDonald et al., 2000a which states that the probable effect concentration for Total DDTs is 572 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110068	Region 3
Bradley Channel

Pollutant:	Deltamethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Eight lines of evidence are available in the administrative record to assess this pollutant. Zero of thre sediment samples exceed the evaluation guideline and zero of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	53599
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Deltamethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	53602
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Deltamethrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the maximum acceptable toxicant concentration (MATC) of 0.02 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is the geometric mean of the lowest observed effect concentration (LOEC) of 0.03 ug/L and the no observed effect concentration (NOEC) of 0.017 ug/L as determined in a 280 day toxicity study with the fathead minnow, Pimephales promelas. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	53601
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Deltamethrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the maximum acceptable toxicant concentration (MATC) of 0.02 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is the geometric mean of the lowest observed effect concentration (LOEC) of 0.03 ug/L and the no observed effect concentration (NOEC) of 0.017 ug/L as determined in a 280 day toxicity study with the fathead minnow, Pimephales promelas. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	153346
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	153589
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	53600
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Deltamethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	153404
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110068, Deltamethrin Region 3      Bradley Channel
LOE ID:	153519
Pollutant:	Deltamethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110011	Region 3
Bradley Channel

Pollutant:	Dichlorvos
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Eleven lines of evidence (LOEs) are available in the administrative record to assess this pollutant. LOEs 53688, 53689, 53690, and 53694 have been removed from this decision and replaced with new LOEs that assess the data using the USEPA aquatic life benchmarks. LOEs 53618 and 53687 were not evaluated using the USEPA aquatic life benchmarks, and therefore are summarized separately. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Zero of one water sample exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). Although a total of 13 samples were collected, 12 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy. Zero of one water sample exceeded the evaluation guideline for aquatic life uses (maximum acceptable toxicant concentration MATC - USEPA Office of Pesticide Programs, 2011). Zero of ten water samples exceeded the evaluation guidelines set to protect the municipal and domestic supply beneficial use. These sample sizes are insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	225071
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dichlorvos. Although a total of 5 samples were collected, 5 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Date for this waterbody was collected over the date range 2006-08-22 to 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164433
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dichlorvos.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164232
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dichlorvos. Although a total of 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-03-28 to 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164415
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dichlorvos. Although a total of 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-03-28 to 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164435
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dichlorvos.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	225111
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dichlorvos. Although a total of 5 samples were collected, 5 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Date for this waterbody was collected over the date range 2006-08-22 to 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164123
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dichlorvos.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA IRIS one-in-a-million cancer risk estimate from oral exposure for dichlorvos is 0.1 ug/L.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	53687
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dichlorvos. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for ddvp (dichlorvos) is the maximum acceptable toxicant concentration (MATC) of 7.2 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 10.1 ug/L and the no observed effect concentration (NOEC) of 5.2 ug/L as determined in a 61 day toxicity study with rainbow trout, Oncorhynchus mykiss. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	53695
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dichlorvos.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA IRIS one-in-a-million cancer risk estimate from oral exposure for dichlorvos is 0.1 ug/L.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	53618
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dichlorvos. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for ddvp (dichlorvos) is the maximum acceptable toxicant concentration (MATC) of 7.2 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 10.1 ug/L and the no observed effect concentration (NOEC) of 5.2 ug/L as determined in a 61 day toxicity study with rainbow trout, Oncorhynchus mykiss. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110011, Dichlorvos Region 3      Bradley Channel
LOE ID:	164396
Pollutant:	Dichlorvos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Dichlorvos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA IRIS one-in-a-million cancer risk estimate from oral exposure for dichlorvos is 0.1 ug/L.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110012	Region 3
Bradley Channel

Pollutant:	Dieldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity. Four lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Zero of the two sediment samples exceeded the evaluation guideline for Cold and Warm Freshwater Habitats. This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero sediment samples exceed the evaluation guidelines for aquatic life protection and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110012, Dieldrin Region 3      Bradley Channel
LOE ID:	53697
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dieldrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for dieldrin is 61.8 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110012, Dieldrin Region 3      Bradley Channel
LOE ID:	153691
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Dieldrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dieldrin from MacDonald et al., 2000a which states that the probable effect concentration for Dieldrin is 61.8 ug/kg dw. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110012, Dieldrin Region 3      Bradley Channel
LOE ID:	153792
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Dieldrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dieldrin from MacDonald et al., 2000a which states that the probable effect concentration for Dieldrin is 61.8 ug/kg dw. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110012, Dieldrin Region 3      Bradley Channel
LOE ID:	53696
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dieldrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for dieldrin is 61.8 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	110085	Region 3
Bradley Channel

Pollutant:	Diflubenzuron
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110085, Diflubenzuron Region 3      Bradley Channel
LOE ID:	164230
Pollutant:	Diflubenzuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Diflubenzuron. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Diflubenzuron is the USEPA Aquatic Life Benchmark of 0.00025 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2017-07-18 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110085, Diflubenzuron Region 3      Bradley Channel
LOE ID:	164664
Pollutant:	Diflubenzuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Diflubenzuron. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Diflubenzuron is the USEPA Aquatic Life Benchmark of 0.00025 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Date for this waterbody was collected over the date range 2017-07-18 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110055	Region 3
Bradley Channel

Pollutant:	Dimethoate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Fifteen lines of evidence (LOEs) are available in the administrative record to assess this pollutant. LOEs 53705, 53707, 53710, and 53715 have been removed from this decision and replaced with new LOEs that assess the data using the USEPA aquatic life benchmarks. LOEs 53708 and 53709 were not evaluated using the USEPA aquatic life benchmarks, and therefore are summarized separately. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: One of 17 water samples exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). Zero of one water sample exceeded the evaluation guideline for aquatic life uses (maximum acceptable toxicant concentration MATC - USEPA Office of Pesticide Programs, 2011). One of six water samples exceeded the evaluation guidelines set to protect the municipal and domestic supply beneficial use. This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One sample exceeded the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	225039
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 5 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164657
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164593
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164523
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164679
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164656
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	53708
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dimethoate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the median lethal concentration (LC50) of 43 ug/L, as determined in a 96 hour toxicity test with the stonefly, Pteronarcys californica (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	53709
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dimethoate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the median lethal concentration (LC50) of 43 ug/L, as determined in a 96 hour toxicity test with the stonefly, Pteronarcys californica (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164829
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164581
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	53703
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Dimethoate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Health Services notification level for dimethoate is 1 µg/L.
Guideline Reference:	Drinking Water Notification Levels and Response Levels
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	53704
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dimethoate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Health Services notification level for dimethoate is 1 µg/L.
Guideline Reference:	Drinking Water Notification and Response Levels: An Overview
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	53702
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Dimethoate.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Health Services notification level for dimethoate is 1 µg/L.
Guideline Reference:	Drinking Water Notification and Response Levels: An Overview
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at Jones - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	164852
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110055, Dimethoate Region 3      Bradley Channel
LOE ID:	224999
Pollutant:	Dimethoate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 5 samples exceeded the water quality threshold for Dimethoate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110013	Region 3
Bradley Channel

Pollutant:	Dinitro-o-cresol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110013, Dinitro-o-cresol Region 3      Bradley Channel
LOE ID:	165175
Pollutant:	Dinitro-o-cresol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dinitro-2-methylphenol, 4,6-.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The 2-Methyl-4, 6-dinitrophenol criteria for the protection of human health from the consumption of water and organisms is 13.4 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110014	Region 3
Bradley Channel

Pollutant:	Disulfoton
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 12 lines of evidence are available in the administrative record to assess this pollutant. Zero of the 7 water samples exceed the evaluation guideline Cold Freshwater Habitat and Warm Freshwater Habitat. Zero of the 14 water samples exceeded the evaluation guideline set to protect drinking water (California Department of Health Services notification level). A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 7 water samples exceed the evaluation guideline Cold Freshwater Habitat and Warm Freshwater Habitat. Zero of the 14 water samples exceeded the evaluation guideline set to protect drinking water (California Department of Health Services notification level). However, this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	165063
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	165185
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	164913
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Disulfoton. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	165212
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	164942
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	164945
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	165241
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	164966
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Disulfoton.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	53717
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Disulfoton.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	53723
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Disulfoton. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	53718
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Disulfoton.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for disulfoton is 0.7 µg/L.
Guideline Reference:	2011 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110014, Disulfoton Region 3      Bradley Channel
LOE ID:	165232
Pollutant:	Disulfoton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Disulfoton. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110015	Region 3
Bradley Channel

Pollutant:	Diuron
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165345
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diuron.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Diuron, 1.3 ug/L, is not exceeded more than once every three years on the average (Fojut et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165491
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Diuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA health advisory for one-in-a-million incremental cancer risk estimate calculated as a drinking water standard for diuron is 2 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165422
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Diuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Diuron, 1.3 ug/L, is not exceeded more than once every three years on the average (Fojut et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165469
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Diuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Diuron, 1.3 ug/L, is not exceeded more than once every three years on the average (Fojut et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165322
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diuron.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA health advisory for one-in-a-million incremental cancer risk estimate calculated as a drinking water standard for diuron is 2 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110015, Diuron Region 3      Bradley Channel
LOE ID:	165398
Pollutant:	Diuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Diuron.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Diuron, 1.3 ug/L, is not exceeded more than once every three years on the average (Fojut et al., 2010).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: III. Diuron. Reviews of Environmental Contamination and Toxicology 216:105-141.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110016	Region 3
Bradley Channel

Pollutant:	Dyfonate (Fonofos or Fonophos)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110016, Dyfonate (Fonofos or Fonophos) Region 3      Bradley Channel
LOE ID:	166858
Pollutant:	Dyfonate (Fonofos or Fonophos)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fonofos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fonofos is the maximum acceptable toxicant concentration (MATC) of 0.45 ug/L. The MATC is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 0.64 ug/L and the no observed effect concentration (NOEC) of 0.31 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110016, Dyfonate (Fonofos or Fonophos) Region 3      Bradley Channel
LOE ID:	166841
Pollutant:	Dyfonate (Fonofos or Fonophos)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fonofos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fonofos is the maximum acceptable toxicant concentration (MATC) of 0.45 ug/L. The MATC is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 0.64 ug/L and the no observed effect concentration (NOEC) of 0.31 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110017	Region 3
Bradley Channel

Pollutant:	Endrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity. Four lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Zero of the two sediment samples exceeded the evaluation guideline for Cold and Warm Freshwater Habitats. This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero sediment samples exceed the evaluation guidelines for aquatic life protection and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110017, Endrin Region 3      Bradley Channel
LOE ID:	53725
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Endrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of endrin is 207 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110017, Endrin Region 3      Bradley Channel
LOE ID:	153662
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Endrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Endrin from MacDonald et al., 2000a which states that the probable effect concentration for Endrin is 207 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110017, Endrin Region 3      Bradley Channel
LOE ID:	53724
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Endrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of endrin is 207 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110017, Endrin Region 3      Bradley Channel
LOE ID:	153782
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Endrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Endrin from MacDonald et al., 2000a which states that the probable effect concentration for Endrin is 207 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110072	Region 3
Bradley Channel

Pollutant:	Esfenvalerate/Fenvalerate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Ten lines of evidence are available in the administrative record to assess this pollutant. Zero of three sediment samples exceed the evaluation guideline and zero of two water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53732
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Fenvalerate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.13 ug/L, as determined in a 96 hour toxicity test using the fathead minnow, Pimephales promelas (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53731
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Esfenvalerate/Fenvalerate.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	154240
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	153940
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	154055
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53734
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Esfenvalerate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.13 ug/L, as determined in a 96 hour toxicity test using the fathead minnow, Pimephales promelas (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	153991
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53733
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Fenvalerate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.13 ug/L, as determined in a 96 hour toxicity test using the fathead minnow, Pimephales promelas (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53739
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Esfenvalerate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.13 ug/L, as determined in a 96 hour toxicity test using the fathead minnow, Pimephales promelas (USEPA Office of Pesticide Programs Ecotoxicity database).
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110072, Esfenvalerate/Fenvalerate Region 3      Bradley Channel
LOE ID:	53726
Pollutant:	Esfenvalerate/Fenvalerate
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Esfenvalerate/Fenvalerate.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	110058	Region 3
Bradley Channel

Pollutant:	Ethalfluralin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110058, Ethalfluralin Region 3      Bradley Channel
LOE ID:	165910
Pollutant:	Ethalfluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Ethalfluralin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethalfluralin is the USEPA Aquatic Life Benchmark of 0.4 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110058, Ethalfluralin Region 3      Bradley Channel
LOE ID:	165824
Pollutant:	Ethalfluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Ethalfluralin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethalfluralin is the USEPA Aquatic Life Benchmark of 0.4 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110046	Region 3
Bradley Channel

Pollutant:	Ethion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110046, Ethion Region 3      Bradley Channel
LOE ID:	165765
Pollutant:	Ethion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Ethion. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethion is the USEPA Aquatic Life Benchmark of 0.028 ug/L for invertebrates (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110046, Ethion Region 3      Bradley Channel
LOE ID:	165701
Pollutant:	Ethion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Ethion. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethion is the USEPA Aquatic Life Benchmark of 0.028 ug/L for invertebrates (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110046, Ethion Region 3      Bradley Channel
LOE ID:	165869
Pollutant:	Ethion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA expected safe lifetime exposure limit in drinking water for Ethion, calculated using the IRIS Reference Dose, is 3.5 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.0005 mg/kg/day as the reference dose.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110059	Region 3
Bradley Channel

Pollutant:	Ethoprop
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Ten lines of evidence (LOEs) are available in the administrative record to assess this pollutant. LOEs 53740, 53741, 53742, and 53658 have been removed from this decision and replaced with new LOEs that assess the data using the USEPA aquatic life benchmarks. LOEs 53659 and 53660 were not evaluated using the USEPA aquatic life benchmarks, and therefore are summarized separately. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Zero of ten water samples exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). Zero of one water sample exceeded the evaluation guideline for aquatic life uses (maximum acceptable toxicant concentration MATC - USEPA Office of Pesticide Programs, 2011). These sample sizes are insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	224964
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	165947
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-09-19
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	166269
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-09-19
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	166118
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	225005
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	165927
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	165656
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	53659
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Ethoprop. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the maximum acceptable toxicant concentration (MATC) of 1.4 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 2.4 ug/L and the no observed effect concentration (NOEC) of 0.80 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	53660
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Ethoprop. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the maximum acceptable toxicant concentration (MATC) of 1.4 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 2.4 ug/L and the no observed effect concentration (NOEC) of 0.80 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110059, Ethoprop Region 3      Bradley Channel
LOE ID:	165945
Pollutant:	Ethoprop
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110064	Region 3
Bradley Channel

Pollutant:	Fenitrothion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110064, Fenitrothion Region 3      Bradley Channel
LOE ID:	166186
Pollutant:	Fenitrothion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenitrothion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenitrothion is the USEPA Aquatic Life Benchmark of 0.087 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110064, Fenitrothion Region 3      Bradley Channel
LOE ID:	165994
Pollutant:	Fenitrothion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenitrothion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenitrothion is the USEPA Aquatic Life Benchmark of 0.087 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110071	Region 3
Bradley Channel

Pollutant:	Fenpropathrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Eight lines of evidence are available in the administrative record to assess this pollutant. One of four sediment samples exceed the evaluation guideline and that sample (also tested for toxicity to invertebrates) resulted in significant toxic effects. Zero of three water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. However, the sediment and water sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of the three sediment samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	166265
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Fenpropathrin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.06 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	154134
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al. ( 2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	166312
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Fenpropathrin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.06 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	153979
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al. ( 2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	154244
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Fenpropathrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al. ( 2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110071, Fenpropathrin Region 3      Bradley Channel
LOE ID:	154003
Pollutant:	Fenpropathrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Fenpropathrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al. ( 2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110065	Region 3
Bradley Channel

Pollutant:	Fenthion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166644
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenthion. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166597
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenthion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166594
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenthion. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166693
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Fenthion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166673
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Fenthion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-09-19
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110065, Fenthion Region 3      Bradley Channel
LOE ID:	166669
Pollutant:	Fenthion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Fenthion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-09-19
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110018	Region 3
Bradley Channel

Pollutant:	Glyphosate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of three lines of evidence are available in the administrative record to assess this pollutant. A total of zero of six samples exceed the evaluation guideline for the cold freshwater habitat beneficial use; zero of six samples exceed the evaluation guideline for the municipal and domestic supply beneficial use; and zero of six samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of six samples exceed the evaluation guideline for the cold freshwater habitat beneficial use, zero of six samples exceed the evaluation guideline for the municipal and domestic supply beneficial use, and zero of six samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110018, Glyphosate Region 3      Bradley Channel
LOE ID:	166928
Pollutant:	Glyphosate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Glyphosate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Glyphosate is the USEPA Aquatic Life Benchmark of 11900 ug/L for a vascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110018, Glyphosate Region 3      Bradley Channel
LOE ID:	166714
Pollutant:	Glyphosate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Glyphosate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Glyphosate is the USEPA Aquatic Life Benchmark of 11900 ug/L for a vascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110018, Glyphosate Region 3      Bradley Channel
LOE ID:	166927
Pollutant:	Glyphosate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Glyphosate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Glyphosate is 0.7 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110086	Region 3
Bradley Channel

Pollutant:	Indoxacarb
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110086, Indoxacarb Region 3      Bradley Channel
LOE ID:	167603
Pollutant:	Indoxacarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Indoxacarb.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Indoxacarb is the USEPA Aquatic Life Benchmark of 75 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110086, Indoxacarb Region 3      Bradley Channel
LOE ID:	167605
Pollutant:	Indoxacarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Indoxacarb.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Indoxacarb is the USEPA Aquatic Life Benchmark of 75 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110020	Region 3
Bradley Channel

Pollutant:	Lead
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. Nine lines of evidence are available in the administrative record to assess this pollutant. One of the eight dissolved lead samples and zero of one sediment samples exceed the evaluation guidelines for the aquatic life beneficial uses. Zero of the five dissolved lead samples and one- of the seven total lead samples exceed the evaluation guideline for Municipal and Domestic Supply beneficial use. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information.' After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of the seven total lead water samples exceeds the evaluation guideline for Municipal and Domestic Supply beneficial use and one of eight dissolved water samples exceeds the evaluation guideline for the aquatic life beneficial use. However, this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	154603
Pollutant:	Lead
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for lead in 128 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	168083
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	233239
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 6 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for lead is 15 ug/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	233248
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for lead is 15 ug/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	233238
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for lead is 15 ug/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	154832
Pollutant:	Lead
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for lead in 128 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	168267
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	167864
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 7 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110020, Lead Region 3      Bradley Channel
LOE ID:	168161
Pollutant:	Lead
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 7 samples exceeded the water quality threshold for Lead.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110021	Region 3
Bradley Channel

Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity. Six lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Zero of the three sediment samples exceeded the evaluation guideline for Cold and Warm Freshwater Habitats. This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero sediment samples exceed the evaluation guidelines for aquatic life protection and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	154759
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for HCH, gamma- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Lindane from MacDonald et al., 2000a which states that the probable effect concentration for Lindane is 4.99 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	53661
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for HCH, gamma.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for Lindane (gamma-HCH) is 4.99 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	53662
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for HCH, gamma.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for Lindane (gamma-HCH) is 4.99 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	154799
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for HCH, gamma- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Lindane from MacDonald et al., 2000a which states that the probable effect concentration for Lindane is 4.99 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	154865
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for HCH, gamma- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Lindane from MacDonald et al., 2000a which states that the probable effect concentration for Lindane is 4.99 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110021, Lindane/gamma Hexachlorocyclohexane (gamma-HCH) Region 3      Bradley Channel
LOE ID:	154806
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for HCH, gamma- .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Lindane from MacDonald et al., 2000a which states that the probable effect concentration for Lindane is 4.99 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	109999	Region 3
Bradley Channel

Pollutant:	Methamidophos
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 109999, Methamidophos Region 3      Bradley Channel
LOE ID:	169696
Pollutant:	Methamidophos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Methamidophos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methamifophos is the USEPA Aquatic Life Benchmark of 4.5 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 109999, Methamidophos Region 3      Bradley Channel
LOE ID:	169112
Pollutant:	Methamidophos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Methamidophos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methamifophos is the USEPA Aquatic Life Benchmark of 4.5 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110053	Region 3
Bradley Channel

Pollutant:	Methidathion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under sections 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Fifteen lines of evidence are available in the administrative record to assess this pollutant. For lines of evidence where the fraction is “not recorded” staff assumed that the fraction is “total” and the sample and exceedance counts are summed for the purpose of making this decision. Zero of 11 water samples exceeded the USEPA aquatic life evaluation guideline. Zero of 11 water samples exceed the USEPA drinking water health advisory level for municipal and domestic water supply. These sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported using table 3.1. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List because applicable water quality standards are not being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	169612
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170095
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2016-07-13
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170139
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2016-07-13
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	169734
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170026
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170163
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methidathion is 0.7 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2016-07-13
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170166
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methidathion is 0.7 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	53673
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Methidathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the maximum acceptable toxicant concentration (MATC) of 0.86 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 1.13 ug/L and the no observed effect concentration (NOEC) of 0.66 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	53672
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Methidathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methidathion is 0.7 µg/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water.  An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170003
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methidathion is 0.7 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	53674
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Methidathion. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the maximum acceptable toxicant concentration (MATC) of 0.86 ug/L. The MATC (or Chronic Value as defined in USEPA 1985, P20 section F) is calculated as the geometric mean of the lowest observed effect concentration (LOEC) of 1.13 ug/L and the no observed effect concentration (NOEC) of 0.66 ug/L, as determined in a 21 day toxicity study with the water flea, Daphnia magna. Threshold values (LOEC and NOEC) are from USEPA Office of Pesticide Programs Ecotoxicity database.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Guideline Reference:	Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170096
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170117
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170144
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110053, Methidathion Region 3      Bradley Channel
LOE ID:	170073
Pollutant:	Methidathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methidathion is 0.7 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110048	Region 3
Bradley Channel

Pollutant:	Methiocarb
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of three samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of two samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of three samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of two samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110048, Methiocarb Region 3      Bradley Channel
LOE ID:	169906
Pollutant:	Methiocarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methiocarb.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methiocarb is the USEPA Aquatic Life Benchmark of 2.75 ug/L for a invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110048, Methiocarb Region 3      Bradley Channel
LOE ID:	169948
Pollutant:	Methiocarb
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methiocarb.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methiocarb is the USEPA Aquatic Life Benchmark of 2.75 ug/L for a invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110049	Region 3
Bradley Channel

Pollutant:	Methomyl
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	170112
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The life-time health advisory for methomyl is 200 ug/L (USEPA 2018).
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	169872
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	170379
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The life-time health advisory for methomyl is 200 ug/L (USEPA 2018).
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	170377
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	169895
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110049, Methomyl Region 3      Bradley Channel
LOE ID:	170113
Pollutant:	Methomyl
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methomyl.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110087	Region 3
Bradley Channel

Pollutant:	Methoxyfenozide
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110087, Methoxyfenozide Region 3      Bradley Channel
LOE ID:	170263
Pollutant:	Methoxyfenozide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methoxyfenozide.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methoxyfenozide is the USEPA Aquatic Life Benchmark of 3.1 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110087, Methoxyfenozide Region 3      Bradley Channel
LOE ID:	170240
Pollutant:	Methoxyfenozide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methoxyfenozide.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Methoxyfenozide is the USEPA Aquatic Life Benchmark of 3.1 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110000	Region 3
Bradley Channel

Pollutant:	Metolachlor, S-
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110000, Metolachlor, S- Region 3      Bradley Channel
LOE ID:	170315
Pollutant:	Metolachlor, S-
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Metolachlor, S-.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Metolachlor, S- is the USEPA Aquatic Life Benchmark of 8 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110000, Metolachlor, S- Region 3      Bradley Channel
LOE ID:	170312
Pollutant:	Metolachlor, S-
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Metolachlor, S-.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Metolachlor, S- is the USEPA Aquatic Life Benchmark of 8 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110025	Region 3
Bradley Channel

Pollutant:	Nickel
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. A total of nine lines of evidence are available in the administrative record to assess this pollutant. For the water matrix, a total of zero of eight samples exceed the water quality objective for the cold freshwater habitat beneficial use, zero of seven samples exceed the dissolved fraction evaluation guideline and zero of eight samples exceed the total fraction evaluation guideline for the municipal and domestic supply beneficial use and zero of eight samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of use. These data are insufficient to determine the applicable beneficial use support rating with the power and confidence required by the Listing Policy. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. For the water matrix, a total of zero of eight samples exceed the water quality objective for the cold freshwater habitat beneficial use, zero of seven samples exceed the dissolved fraction evaluation guideline and zero of eight samples exceed the total fraction evaluation guideline for the municipal and domestic supply beneficial use and zero of eight samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of use. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171117
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171182
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171288
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2 (Water Quality Control Plan, Central Coast Basin)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The maximum contaminant level of nickel in public water systems shall be 0.1 mg/L (California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	154964
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for nickel in 48.6 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171088
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171187
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2 (Water Quality Control Plan, Central Coast Basin)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The maximum contaminant level of nickel in public water systems shall be 0.1 mg/L (California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	155188
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for nickel in 48.6 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171134
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110025, Nickel Region 3      Bradley Channel
LOE ID:	171225
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2 (Water Quality Control Plan, Central Coast Basin)
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The maximum contaminant level of nickel in public water systems shall be 0.1 mg/L (California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110029	Region 3
Bradley Channel

Pollutant:	Organophosphate Pesticides
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. Zero of 13 water samples exceeded the aquatic life evaluation guideline for additive effects of chlorpyrifos and diazinon (Bailey et al., 1997). Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of 13 samples exceeded the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173480
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173762
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173653
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173627
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173824
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173609
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173814
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110029, Organophosphate Pesticides Region 3      Bradley Channel
LOE ID:	173455
Pollutant:	Organophosphate Pesticides
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Organophosphorus Pesticides.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from the additive effects of the organophophate pesticides chlorpyrifos and diazinon is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of chlorpyrifos and diazinon from a single sample, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample is considered to be in exceedance of the water quality standard. (Bailey et al., 1997).
Guideline Reference:	Joint acute toxicity of Diazinon and Chlorpyrifos to Ceriodaphnia dubia.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110050	Region 3
Bradley Channel

Pollutant:	Oryzalin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Zero of four water samples exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). Zero of four water samples exceeded the evaluation guidelines set to protect the municipal and domestic supply beneficial use. These sample sizes are insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110050, Oryzalin Region 3      Bradley Channel
LOE ID:	173678
Pollutant:	Oryzalin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oryzalin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Oryzalin is the USEPA Aquatic Life Benchmark of 13 ug/L for a vascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110050, Oryzalin Region 3      Bradley Channel
LOE ID:	173680
Pollutant:	Oryzalin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oryzalin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Oryzalin is the USEPA Aquatic Life Benchmark of 13 ug/L for a vascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110050, Oryzalin Region 3      Bradley Channel
LOE ID:	173658
Pollutant:	Oryzalin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oryzalin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for Oryzalin is 35 ug/L.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110031	Region 3
Bradley Channel

Pollutant:	Oxamyl (Vydate)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110031, Oxamyl (Vydate) Region 3      Bradley Channel
LOE ID:	173882
Pollutant:	Oxamyl (Vydate)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxamyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Oxamyl is the USEPA Aquatic Life Benchmark of 27 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110031, Oxamyl (Vydate) Region 3      Bradley Channel
LOE ID:	173840
Pollutant:	Oxamyl (Vydate)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxamyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Oxamyl is the USEPA Aquatic Life Benchmark of 27 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110031, Oxamyl (Vydate) Region 3      Bradley Channel
LOE ID:	173580
Pollutant:	Oxamyl (Vydate)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxamyl.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of organic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 5.5, Section 64444, Table 64444-A.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Oxamyl is 0.05 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-05-28
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110056	Region 3
Bradley Channel

Pollutant:	Oxyfluorfen
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110056, Oxyfluorfen Region 3      Bradley Channel
LOE ID:	174071
Pollutant:	Oxyfluorfen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oxyfluorfen.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Oxyfluorfen does not exceed 0.14 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water quality criteria report for Oxyfluorfen. Phase III: application of the pesticide water quality criteria methodology.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110056, Oxyfluorfen Region 3      Bradley Channel
LOE ID:	174043
Pollutant:	Oxyfluorfen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Oxyfluorfen.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Oxyfluorfen does not exceed 0.14 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water quality criteria report for Oxyfluorfen. Phase III: application of the pesticide water quality criteria methodology.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110032	Region 3
Bradley Channel

Pollutant:	Oxygen, Dissolved
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Nineteen lines of evidence are available in the administrative record to assess this pollutant. Eleven of the 200 samples exceed the dissolved oxygen water quality objective for cold freshwater habitat (Basin Plan) and four of 116 samples exceeds the water quality objective for fish spawning (Basin Plan). Eight of the 200 samples exceed the dissolved oxygen water quality objective for warm freshwater habitat (Basin Plan). Note that there is no difference between samples fractions ‘dissolved’ and ‘total,’ therefore sample and exceedance counts will be summed for the purpose of this decision. Previous decisions (pre-2020) included dissolved oxygen saturation LOEs as ancillary evidence. This decision will no longer include dissolved oxygen saturation and these LOEs will be retired next cycle. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) List in the Water Quality Limited Segments category. A minimum of 26 samples is needed to determine if a beneficial use is supported using table 3.2 of the Listing Policy. Therefore, the data support the conclusion that the aquatic life and fish spawning beneficial uses are fully supported. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eleven of the 200 samples exceed objective for cold freshwater habitat, four of 116 samples exceed the objective for fish spawning, and eight of the 200 samples exceed the objective for warm freshwater habitat. None of these exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174194
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	102
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 102 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	173924
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 12 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174808
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Fish Spawning
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-26 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174801
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 12 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174058
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-26 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	175132
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	102
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 102 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174825
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Fish Spawning
Number of Samples:	12
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 12 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174810
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-26 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	174826
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Fish Spawning
Number of Samples:	102
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 102 samples exceeded the water quality threshold for Oxygen, Dissolved.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	14419
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	13438
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	48116
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 36 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	49463
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 11 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	49473
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 11 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	14405
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 20 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	48115
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 36 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	13403
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 14 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, dissolved oxygen concentration shall not be reduced below 5.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	13402
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 14 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110032, Oxygen, Dissolved Region 3      Bradley Channel
LOE ID:	13437
Pollutant:	Oxygen, Dissolved
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 3 samples exceed the criterion for Oxygen, Dissolved.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	110073	Region 3
Bradley Channel

Pollutant:	Paraquat
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110073, Paraquat Region 3      Bradley Channel
LOE ID:	176554
Pollutant:	Paraquat
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Paraquat.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Paraquat is the USEPA Aquatic Life Benchmark of 0.396 ug/L for a nonvascular plant (acute) for Paraquat dichloride.
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-12-16
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110073, Paraquat Region 3      Bradley Channel
LOE ID:	176459
Pollutant:	Paraquat
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Paraquat.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Paraquat is the USEPA Aquatic Life Benchmark of 0.396 ug/L for a nonvascular plant (acute) for Paraquat dichloride.
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2013-12-16
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110060	Region 3
Bradley Channel

Pollutant:	Pendimethalin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of two lines of evidence are available in the administrative record to assess this pollutant. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of four samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of four samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110060, Pendimethalin Region 3      Bradley Channel
LOE ID:	176533
Pollutant:	Pendimethalin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pendimethalin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Pendimethalin is the USEPA Aquatic Life Benchmark of 5.2 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110060, Pendimethalin Region 3      Bradley Channel
LOE ID:	176559
Pollutant:	Pendimethalin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pendimethalin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Pendimethalin is the USEPA Aquatic Life Benchmark of 5.2 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110033	Region 3
Bradley Channel

Pollutant:	Pentachlorophenol (PCP)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110033, Pentachlorophenol (PCP) Region 3      Bradley Channel
LOE ID:	176456
Pollutant:	Pentachlorophenol (PCP)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Pentachlorophenol.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criteria has a value of 15 ug/L when based on a default pH of 7.8. (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110033, Pentachlorophenol (PCP) Region 3      Bradley Channel
LOE ID:	176750
Pollutant:	Pentachlorophenol (PCP)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Pentachlorophenol.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criteria has a value of 15 ug/L when based on a default pH of 7.8. (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110033, Pentachlorophenol (PCP) Region 3      Bradley Channel
LOE ID:	176390
Pollutant:	Pentachlorophenol (PCP)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the water quality threshold for Pentachlorophenol. Although a total of 6 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The Pentachlorophenol criteria for the protection of human health from the consumption of water and organisms is 0.28 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ).
Temporal Representation:	Data for this waterbody was collected over the date range 2013-03-28 to 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110075	Region 3
Bradley Channel

Pollutant:	Permethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Six lines of evidence are available in the administrative record to assess this pollutant. Zero of six sediment samples exceed the evaluation guideline and one of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	155163
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the evaluation guideline for Permethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110075	Region 3
Bradley Channel

Pollutant:	Permethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Six lines of evidence are available in the administrative record to assess this pollutant. Zero of six sediment samples exceed the evaluation guideline and one of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	176779
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Permethrin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of permethrin does not exceed 0.002 ug/L (2 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-05-16
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	155201
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the evaluation guideline for Permethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	53706
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Permethrin. The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of permethrin does not exceed 0.002 ug/L and if the 1-h average concentration does not exceed 0.01 ug/L. In this assessment, the 4-day value was used. Mixtures of permethrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	53699
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Permethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	53701
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of permethrin does not exceed 0.002 ug/L and if the 1-h average concentration does not exceed 0.01 ug/L. In this assessment, the 4-day value was used. Mixtures of permethrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	53700
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Permethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	110075	Region 3
Bradley Channel

Pollutant:	Permethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 at least one line of evidence is necessary to assess listing status, but under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the section 303(d) List. Six lines of evidence are available in the administrative record to assess this pollutant. Zero of six sediment samples exceed the evaluation guideline and one of one water samples exceed the evaluation guideline used to interpret the narrative water quality objective for aquatic life protection. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the samples exceed the evaluation guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	155432
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	176898
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Permethrin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of permethrin does not exceed 0.002 ug/L (2 ng/L) more than once every three years on the average (Fojut et al., 2012).
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-05-16
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110075, Permethrin Region 3      Bradley Channel
LOE ID:	155486
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110035	Region 3
Bradley Channel

Pollutant:	Phenol
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110035, Phenol Region 3      Bradley Channel
LOE ID:	179838
Pollutant:	Phenol
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Phenol.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The phenol criteria for the protection of human health from the consumption of water and organisms is 21,000 ug/L (Basin Plan).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110061	Region 3
Bradley Channel

Pollutant:	Phorate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Sixteen lines of evidence (LOEs) are available in the administrative record to assess this pollutant. LOEs 53711, 53712, 53713, and 53714 have been removed from this decision and replaced with new LOEs that assess the data using the USEPA aquatic life benchmarks. LOEs 53719 and 53720 were not evaluated using the USEPA aquatic life benchmarks, and therefore are summarized separately. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Zero of 13 water samples exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). Zero of one water sample exceeded the evaluation guideline for aquatic life uses (maximum acceptable toxicant concentration MATC - USEPA Office of Pesticide Programs, 2011). Zero of 14 water samples exceeded the evaluation guidelines set to protect the municipal and domestic supply beneficial use. These sample sizes are insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	53722
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Phorate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The national health advisory level for phorate is 0.7 µg/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	53727
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phorate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The national health advisory level for phorate is 0.7 µg/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	53720
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phorate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the median lethal concentration (LC50; 2 ug/L). This is based on a 96 hour toxicity study of bluegill sunfish (Lepomis macrochirus)
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179843
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179922
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	225483
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Phorate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	225202
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Phorate.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2006-08-22 and 2007-09-25
Environmental Conditions:
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	53719
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phorate. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the median lethal concentration (LC50; 2 ug/L). This is based on a 96 hour toxicity study of bluegill sunfish (Lepomis macrochirus)
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179846
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179897
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The National Academy of Sciences health advisory for phorate is 0.7 ug/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179773
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179720
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The National Academy of Sciences health advisory for phorate is 0.7 ug/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179793
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	53721
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Phorate.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The National Academy of Sciences health advisory for phorate is 0.7 µg/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179721
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110061, Phorate Region 3      Bradley Channel
LOE ID:	179975
Pollutant:	Phorate
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phorate.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The National Academy of Sciences health advisory for phorate is 0.7 ug/L. This was calculated using the no-adverse-effect dosage of 0.01 mg/kg, assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and divided by 100 for a factor of safety.
Guideline Reference:	National Academy of Sciences - Volume I Drinking Water and Health
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110066	Region 3
Bradley Channel

Pollutant:	Phosmet
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Twelve lines of evidence are available in the administrative record to assess this pollutant. Zero of nine water samples exceed the USEPA aquatic life evaluation guideline. Zero of nine samples exceed the USEPA drinking water health advisory. These sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported using table 3.1. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List because applicable water quality standards are not being exceeded. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180379
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180681
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180138
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180113
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for phosmet is 140 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180273
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for phosmet is 140 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180740
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for phosmet is 140 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180380
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP SpecialStudies data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2018-01-17 and 2018-01-17
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180677
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	180240
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Phosmet.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	53728
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phosmet. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	According to the USEPA Office of Pesticide Programs Ecotoxicity database, the aquatic life EC50 for Phosmet is 5.6 ug/L.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	53730
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phosmet. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for phosmet is 140 µg/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water.  An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110066, Phosmet Region 3      Bradley Channel
LOE ID:	53729
Pollutant:	Phosmet
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phosmet. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	According to the USEPA Office of Pesticide Programs Ecotoxicity database, the aquatic life EC50 for Phosmet is 5.6 ug/L.
Guideline Reference:	OPP Pesticide Ecotoxicity Database.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	110074	Region 3
Bradley Channel

Pollutant:	Prodiamine
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. The following is a summary of the sample and exceedances for each beneficial use: Zero of four water samples exceeded the USEPA aquatic life evaluation guideline (USEPA benchmark). This sample size is insufficient to determine an applicable beneficial use support rating with the power and confidence of the Listing Policy. In accordance with Table 3.1 of the Listing Policy, a minimum of 16 samples is needed to determine if a beneficial use is fully supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero samples exceed the evaluation guidelines. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110074, Prodiamine Region 3      Bradley Channel
LOE ID:	180576
Pollutant:	Prodiamine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Prodiamine.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Prodiamine is the USEPA Aquatic Life Benchmark of 1.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110074, Prodiamine Region 3      Bradley Channel
LOE ID:	180510
Pollutant:	Prodiamine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Prodiamine.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Prodiamine is the USEPA Aquatic Life Benchmark of 1.5 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110054	Region 3
Bradley Channel

Pollutant:	Prometryn
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of three lines of evidence are available in the administrative record to assess this pollutant. A total of zero of two samples exceed the evaluation guideline for the cold freshwater habitat beneficial use; zero of two samples exceed the evaluation guideline for the municipal and domestic supply beneficial use; and zero of two samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of two samples exceed the evaluation guideline for the cold freshwater habitat beneficial use, zero of two samples exceed the evaluation guideline for the municipal and domestic supply beneficial use, and zero of two samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110054, Prometryn Region 3      Bradley Channel
LOE ID:	180666
Pollutant:	Prometryn
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Prometryn.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Prometryn does not exceed 0.562 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Prometryn Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110054, Prometryn Region 3      Bradley Channel
LOE ID:	180447
Pollutant:	Prometryn
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Prometryn.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Prometryn does not exceed 0.562 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Prometryn Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110054, Prometryn Region 3      Bradley Channel
LOE ID:	180750
Pollutant:	Prometryn
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Prometryn.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	For drinking water, it was based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for prometryn is 28 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water. An additional uncertainty factor of 10 is used for Class C carcinogens
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-05-16 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110077	Region 3
Bradley Channel

Pollutant:	Pyraclostrobin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110077, Pyraclostrobin Region 3      Bradley Channel
LOE ID:	180546
Pollutant:	Pyraclostrobin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pyraclostrobin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Pyraclostrobin is the USEPA Aquatic Life Benchmark of 1.5 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110077, Pyraclostrobin Region 3      Bradley Channel
LOE ID:	180496
Pollutant:	Pyraclostrobin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pyraclostrobin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Pyraclostrobin is the USEPA Aquatic Life Benchmark of 1.5 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110088	Region 3
Bradley Channel

Pollutant:	Quinoxyfen
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110088, Quinoxyfen Region 3      Bradley Channel
LOE ID:	181044
Pollutant:	Quinoxyfen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Quinoxyfen.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Quinoxyfen is the USEPA Aquatic Life Benchmark of 13 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110088, Quinoxyfen Region 3      Bradley Channel
LOE ID:	181045
Pollutant:	Quinoxyfen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Quinoxyfen.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Quinoxyfen is the USEPA Aquatic Life Benchmark of 13 ug/L for a fish (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110037	Region 3
Bradley Channel

Pollutant:	Selenium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	180762
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for selenium is 0.05 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	180950
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	181178
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All inland surface waters, enclosed bays, and estuaries shall not contain concentrations of inorganic chemicals in excess of the maximum contaminant levels for primary drinking water standards specified in California Code of Regulations, Title 22, Division 4, Chapter 15, Sections 64431 and 64433.2.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for selenium is 0.05 mg/L (California Code of Regulations, Title 22).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	181103
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-12-12
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	181365
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110037, Selenium Region 3      Bradley Channel
LOE ID:	181033
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	The criterion continuous concentration to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110038	Region 3
Bradley Channel

Pollutant:	Silver
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110038, Silver Region 3      Bradley Channel
LOE ID:	181881
Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110038, Silver Region 3      Bradley Channel
LOE ID:	181832
Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110039	Region 3
Bradley Channel

Pollutant:	Simazine
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of six lines of evidence are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. Once summed, a total of zero of five samples exceed the evaluation guideline for the cold freshwater habitat beneficial use; zero of five samples exceed the evaluation guideline for the municipal and domestic supply beneficial use; and zero of five samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of five samples exceed the evaluation guideline for the cold freshwater habitat beneficial use, zero of five samples exceed the evaluation guideline for the municipal and domestic supply beneficial use, and zero of five samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181910
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Simazine.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 6 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181888
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Simazine.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 6 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181867
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Simazine.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Simazine incorporated by reference in the Basin Plan is 4 ug/L (Basin Plan).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2017-07-18 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181977
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Simazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 6 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181979
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Simazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 6 ug/L for a nonvascular plant (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110039, Simazine Region 3      Bradley Channel
LOE ID:	181978
Pollutant:	Simazine
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Simazine.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Maximum Contaminant Level for Simazine incorporated by reference in the Basin Plan is 4 ug/L (Basin Plan).
Guideline Reference:	California MCLs - Title 17 and Title 22 documents for 2019 - California Regulations Related to Drinking Water
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	126174	Region 3
Bradley Channel

Pollutant:	Temperature, water
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. However the evaluation guideline (Moyle, 1976) is specific to steelhead trout tolerance and does it flow to or connect with steelhead habitat. Therefore the evaluation guideline (which is specific for steelhead) is not applicable in this water segment. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Therefore the evaluation guideline (which is specific for steelhead) is not applicable in this water segment. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because the evaluation guideline is not applicable.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	13458
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Water Temperature.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 6/30/2000-9/8/2000. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	216958
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 12 samples exceeded the water quality threshold for Temperature.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	14453
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	12
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 12 of 20 samples exceed the criterion for Water Temperature.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	48144
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	39
Number of Exceedances:	16
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 16 of 39 samples exceed the criterion for Water Temperature.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-6/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	49486
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	11
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 11 samples exceed the criterion for Water Temperature.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Basin Plan).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-12/4/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	13420
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for Water Temperature.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	216789
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Salinas Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Data Reference:	Field, Habitat, Sediment, Tissue, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2019-02-27 and 2019-02-27
Environmental Conditions:
QAPP Information:	SWAMP 2008, SWAMP 2017
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 126174, Temperature, water Region 3      Bradley Channel
LOE ID:	216834
Pollutant:	Temperature, water
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	101
Number of Exceedances:	57
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 57 of 101 samples exceeded the water quality threshold for Temperature.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976).
Guideline Reference:	Inland Fishes of California
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2010-04-28 and 2018-12-17
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110040	Region 3
Bradley Channel

Pollutant:	Terbufos
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110040, Terbufos Region 3      Bradley Channel
LOE ID:	156079
Pollutant:	Terbufos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Terbufos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Terbufos is the USEPA Aquatic Life Benchmark of 0.03 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110040, Terbufos Region 3      Bradley Channel
LOE ID:	156057
Pollutant:	Terbufos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Terbufos.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA drinking water health advisory for terbufos is 0.4 ug/L.
Guideline Reference:	2018 Edition of the Drinking Water Standards and Health Advisories
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110040, Terbufos Region 3      Bradley Channel
LOE ID:	156046
Pollutant:	Terbufos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Terbufos. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Terbufos is the USEPA Aquatic Life Benchmark of 0.03 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU).
Temporal Representation:	Date for this waterbody was collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110080	Region 3
Bradley Channel

Pollutant:	Thiamethoxam
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:	This decision was made by SWRCB staff.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 110080, Thiamethoxam Region 3      Bradley Channel
LOE ID:	156530
Pollutant:	Thiamethoxam
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Thiamethoxam.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Thiamethoxam is the USEPA Aquatic Life Benchmark of 0.74 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-12-12 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110080, Thiamethoxam Region 3      Bradley Channel
LOE ID:	156751
Pollutant:	Thiamethoxam
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Thiamethoxam.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Thiamethoxam is the USEPA Aquatic Life Benchmark of 0.74 ug/L for an invertebrate (chronic).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-12-12 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110042	Region 3
Bradley Channel

Pollutant:	Trifluralin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of four lines of evidence are available in the administrative record to assess this pollutant. Sample and exceedance counts for the lines of evidence with the fraction identified as “none” or “not recorded” are grouped together with those having the fraction “total”, based on the analytical method used. Once summed, a total of zero of nine samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of nine samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. The readily available data and information are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of zero of nine samples exceed the evaluation guideline for the cold freshwater habitat beneficial use and zero of nine samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110042, Trifluralin Region 3      Bradley Channel
LOE ID:	183270
Pollutant:	Trifluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Trifluralin.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Trifluralin does not exceed 0.33 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Trifluralin Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110042, Trifluralin Region 3      Bradley Channel
LOE ID:	183293
Pollutant:	Trifluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Trifluralin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Trifluralin does not exceed 0.33 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Trifluralin Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110042, Trifluralin Region 3      Bradley Channel
LOE ID:	156311
Pollutant:	Trifluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Trifluralin.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Trifluralin does not exceed 0.33 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Trifluralin Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110042, Trifluralin Region 3      Bradley Channel
LOE ID:	156270
Pollutant:	Trifluralin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Trifluralin.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the four-day average concentration of Trifluralin does not exceed 0.33 ug/L in the water column more than once every three years on average (Bower, et al. 2017).
Guideline Reference:	Water Quality Criteria Report for Trifluralin Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology University of California, Davis.
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110044	Region 3
Bradley Channel

Pollutant:	Zinc
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. A total of six lines of evidence are available in the administrative record to assess this pollutant. For the water matrix, a total of zero of 17 samples exceed the water quality objective for the cold freshwater habitat beneficial use and zero of 17 samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. For the water matrix, a total of zero of 17 samples exceed the water quality objective for the cold freshwater habitat beneficial use and zero of 17 samples exceed the water quality objective for the warm freshwater habitat beneficial use. For the sediment matrix, a total of zero of one sample exceeds the evaluation guideline for the cold freshwater habitat beneficial use and zero of one sample exceeds the evaluation guideline for the warm freshwater habitat beneficial use. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	155861
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for zinc in 459 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	155863
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for zinc in 459 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	182795
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Zinc.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	182709
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Zinc.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	182764
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 12 samples exceeded the water quality threshold for Zinc.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110044, Zinc Region 3      Bradley Channel
LOE ID:	156600
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 12 samples exceeded the water quality threshold for Zinc.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site (312BCU)
Temporal Representation:	The samples were collected between the dates of 2013-01-08 and 2013-11-06
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	110047	Region 3
Bradley Channel

Pollutant:	Imidacloprid
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	No Source Analysis Available
Expected TMDL Completion Date:	2027
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. Six of the six water samples exceed the evaluation guideline applied to protect aquatic life beneficial uses. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Six of the six water samples exceed the evaluation guideline. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110047, Imidacloprid Region 3      Bradley Channel
LOE ID:	167195
Pollutant:	Imidacloprid
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 4 samples exceeded the water quality threshold for Imidacloprid.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Imidacloprid does not exceed 0.016 ug/L. (UC Davis Water Quality Criteria)
Guideline Reference:	Water Quality Criteria Report for Imidacloprid Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110047, Imidacloprid Region 3      Bradley Channel
LOE ID:	167048
Pollutant:	Imidacloprid
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Imidacloprid.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Imidacloprid does not exceed 0.016 ug/L. (UC Davis Water Quality Criteria)
Guideline Reference:	Water Quality Criteria Report for Imidacloprid Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-12-12 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110047, Imidacloprid Region 3      Bradley Channel
LOE ID:	167029
Pollutant:	Imidacloprid
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Imidacloprid.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Imidacloprid does not exceed 0.016 ug/L. (UC Davis Water Quality Criteria)
Guideline Reference:	Water Quality Criteria Report for Imidacloprid Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2017-12-12 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110047, Imidacloprid Region 3      Bradley Channel
LOE ID:	167287
Pollutant:	Imidacloprid
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	4
Number of Exceedances:	4
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and results are as follows: 4 of 4 samples exceeded the water quality threshold for Imidacloprid.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the 4-day average concentration of Imidacloprid does not exceed 0.016 ug/L. (UC Davis Water Quality Criteria)
Guideline Reference:	Water Quality Criteria Report for Imidacloprid Phase III: Application of the pesticide water quality criteria methodology. Department of Environmental Toxicology. University of California, Davis
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119)
Temporal Representation:	The samples were collected between the dates of 2016-05-17 and 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

DECISION ID	110022	Region 3
Bradley Channel

Pollutant:	Linuron
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	No Source Analysis Available
Expected TMDL Completion Date:	2035
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. A total of three lines of evidence are available in the administrative record to assess this pollutant. A total of three of six samples exceed the evaluation guideline for the cold freshwater habitat beneficial use; one of six samples exceed the evaluation guideline for the municipal and domestic supply beneficial use; and three of six samples exceed the evaluation guideline for the warm freshwater habitat beneficial use. After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. A total of three of six samples exceed the evaluation guideline for the cold freshwater habitat beneficial use, one of six samples exceed the evaluation guideline for the municipal and domestic supply beneficial use, and three of six samples exceed the evaluation guideline for the warm freshwater habitat beneficial use and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110022, Linuron Region 3      Bradley Channel
LOE ID:	168135
Pollutant:	Linuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	6
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 6 samples exceeded the water quality threshold for Linuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for linuron is 1.4 ug/L.
Guideline Reference:	IRIS Reference Summary (Various Pollutants)
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110022, Linuron Region 3      Bradley Channel
LOE ID:	168115
Pollutant:	Linuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 6 samples exceeded the water quality threshold for Linuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Linuron is the USEPA Aquatic Life Benchmark of 0.09 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110022, Linuron Region 3      Bradley Channel
LOE ID:	168424
Pollutant:	Linuron
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	6
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and results are as follows: 3 of 6 samples exceeded the water quality threshold for Linuron.
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Linuron is the USEPA Aquatic Life Benchmark of 0.09 ug/L for a invertebrate (acute).
Guideline Reference:	OPP Aquatic Life Benchmarks
Spatial Representation:	The samples were collected at 1 monitoring site (312BCJ)
Temporal Representation:	The samples were collected between the dates of 2013-03-28 and 2018-01-09
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110051	Region 3
Bradley Channel

Pollutant:	Bifenthrin
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Sources:	Agriculture | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. Eleven lines of evidence are available in the administrative record to assess this pollutant. Three of the five sediment samples exceed the evaluation guideline. These samples are associated with sediment toxicity. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. Three of four sample exceeded the evaluation guideline for water. However for water, insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of the five sediment samples exceed the evaluation guideline and these samples are associated with sediment toxicity. In addition, and three of four water samples exceed the water guideline. Both exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) List. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	53628
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Bifenthrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Bifenthrin does not exceed 0.0006 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	53625
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Bifenthrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of three toxicity LC50 values from Amweg et al. (2005) and one toxicity LC50 value from Amweg and Weston (2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	151526
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin from Amweg et al. (2005) and Amweg and Weston (2007).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	151404
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Bifenthrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin from Amweg et al. (2005) and Amweg and Weston (2007).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	151639
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the evaluation guideline for Bifenthrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin from Amweg et al. (2005) and Amweg and Weston (2007).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2017-09-26
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	159031
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and the results are as follows: 3 of the 3 samples exceeded the water quality threshold for Bifenthrin. Although a total of 4 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of bifenthrin does not exceed 0.0006 ug/L (Fojut et al., 2012).
Guideline Reference:	Water quality criteria report for Bifenthrin. Phase III: application of the pesticide water quality criteria methodology.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Data for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	158933
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed Surface Water Monitoring Project data for Bradley Channel to determine beneficial use support and the results are as follows: 3 of the 3 samples exceeded the water quality threshold for Bifenthrin. Although a total of 4 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:	Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses (Water Quality Control Plan, Central Coast Basin).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Aquatic life should not be affected unacceptably if the four-day average concentration of bifenthrin does not exceed 0.0006 ug/L (Fojut et al., 2012).
Guideline Reference:	Water quality criteria report for Bifenthrin. Phase III: application of the pesticide water quality criteria methodology.
Spatial Representation:	The samples were collected at 1 monitoring site (Santa Barbara 119).
Temporal Representation:	Data for this waterbody was collected over the date range 2016-05-17 to 2017-07-18
Environmental Conditions:
QAPP Information:	Data is exempt from QAPP requirement
QAPP Information Reference(s):	This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	53627
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Bifenthrin. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Bifenthrin does not exceed 0.0006 ug/L.
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	53745
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	151245
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin from Amweg et al. (2005) and Amweg and Weston (2007).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	148647
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	53626
Pollutant:	Bifenthrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Bifenthrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Evaluation Guideline:	The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of three toxicity LC50 values from Amweg et al. (2005) and one toxicity LC50 value from Amweg and Weston (2007).
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110051, Bifenthrin Region 3      Bradley Channel
LOE ID:	148639
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

DECISION ID	130095	Region 3
Bradley Channel

Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Sources:	Agriculture | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) List under section 3.1 and section 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the 303(d) List. Sixteen lines of evidence are available in the administrative record to assess this pollutant. Six LOEs summarize sediment samples. Three of three sediment samples exceed the DDE evaluation guideline (MacDonald et al., 2000a) set to protect for aquatic life beneficial uses. These samples are associated with sediment toxicity. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of three sediment samples exceed the evaluation guidelines and these samples are associated with sediment toxicity. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. The TMDL for toxicity and pesticides in the Santa Maria River Watershed has been approved by the USEPA on August 31, 2015. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) List because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. Furthermore, this pollutant waterbody combination should be placed in the 'Being Addressed' portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	53745
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	148647
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	53657
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	78944
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	78945
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	148639
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	78943
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	53656
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	153264
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDE (Dichlorodiphenyldichloroethylene) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDE from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDE is 31.3 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	153257
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDE (Dichlorodiphenyldichloroethylene) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDE from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDE is 31.3 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	153238
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDE (Dichlorodiphenyldichloroethylene) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDE from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDE is 31.3 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	53653
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for DDE.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDE is 31.3 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	53654
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for DDE.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDE is 31.3 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 130095, DDE (Dichlorodiphenyldichloroethylene) Region 3      Bradley Channel
LOE ID:	153280
Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for DDE (Dichlorodiphenyldichloroethylene) .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for Sum DDE from MacDonald et al., 2000a which states that the probable effect concentration for Sum DDE is 31.3 ug/kg. (dw = Dry Weight)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2010-05-25
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	110045	Region 3
Bradley Channel

Pollutant:	Pyrethroids
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Agriculture | Urban Runoff/Storm Sewers
TMDL Name:	Santa Maria River Watershed Toxicity and Pesticides TMDL
TMDL Project Code:	1081
Date TMDL Approved by USEPA:	08/31/2015
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) List. 28 lines of evidence are available in the administrative record to assess this pollutant. Three of the six sediment samples exceed the evaluation guideline. These samples are associated with sediment toxicity. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of the six sediment samples exceed the evaluation guideline and these samples are associated with sediment toxicity. This exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. The Santa Maria River Watershed Toxicity and Pesticides TMDL was approved by the USEPA on 8/31/2015. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) List because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. Furthermore, this pollutant waterbody combination should be placed in the 'Being Addressed' portion of the 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	53657
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	155752
Pollutant:	Pyrethroids
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 2 of the 5 samples exceeded the evaluation guideline for Pyrethroids .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Guideline Reference:	Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706
Guideline Reference:	Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	78943
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	148558
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	148639
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	148647
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	1 of the 1 samples collected by SWAMP RWB3 CCAMP Santa Maria Rotation for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Survival, Hyalella azteca, for Growth (wt/surv indiv)
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCU )
Temporal Representation:	The samples were collected between the dates of 2013-06-24 and 2013-06-24.
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	148799
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	7
Number of Exceedances:	7
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	7 of the 7 samples collected by RWB3 Cooperative Monitoring Program for Bradley Channel exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Central Coastal Basin Plan 2019).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 station. Monitoring site: ( 312BCJ )
Temporal Representation:	The samples were collected between the dates of 2013-05-28 and 2018-04-18.
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	78944
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	53745
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The one sample exhibited significant toxicity. The toxicity tests included survival and growth of Hyalella azteca. Statistically significant effects on the survival of Hyalella azteca was observed on 6/10/2009.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Spatial Representation:	The samples were collected at Bradley Channel at River Oaks (312BRO).
Temporal Representation:	The samples were collected in and June of 2009.
Environmental Conditions:
QAPP Information:	The data was collected for Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study and analyzed at the Marine Pollution Studies Laboratory. Sampling and analysis was conducted following the SWAMP QAPrP 2008. This is a SWAMP field crew and lab working under contract for the RB.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	78945
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	3
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Three samples were collected to evaluate sediment toxicity. Three of the three samples exhibited significant toxicity to Hyalella Azteca survival and growth.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Spatial Representation:	The samples were collected at Bradley Channel site 312BCJ.
Temporal Representation:	The samples were collected quarterly from April 2007 to April 2009.
Environmental Conditions:
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	23711
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 4/20/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	23710
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 4/20/2005. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	23708
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 5/16/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	23709
Pollutant:	Invertebrate Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPsouth) data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met).
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival.
Guideline Reference:	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected on a single day 5/16/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	155599
Pollutant:	Pyrethroids
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Guideline Reference:	Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706
Guideline Reference:	Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	155723
Pollutant:	Pyrethroids
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed SWAMP RWB3 CCAMP Santa Maria Rotation data for Bradley Channel to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Guideline Reference:	Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706
Guideline Reference:	Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCU.
Temporal Representation:	Data for this waterbody were collected over the date range 2013-06-24 to 2013-06-24
Environmental Conditions:
QAPP Information:	SWAMP 2008
QAPP Information Reference(s):	Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	155706
Pollutant:	Pyrethroids
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	2
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed RWB3 Cooperative Monitoring Program data for Bradley Channel to determine beneficial use support and the results are as follows: 2 of the 5 samples exceeded the evaluation guideline for Pyrethroids .
Data Reference:	Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 3.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Guideline Reference:	Partitioning, bioavailability, and toxicity of the pyrethroid insecticide cypermethrin in sediments. Environmental Toxicology and Chemistry 21:9-15
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Guideline Reference:	Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Guideline Reference:	Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee. Environmental Science and Technology, 40(5): 1700-1706
Guideline Reference:	Compilation of freshwater OC-normalized sediment toxicity data for pyrethroids
Spatial Representation:	Data were collected from 1 station(s). Station Code(s): 312BCJ.
Temporal Representation:	Data for this waterbody were collected over the date range 2010-05-25 to 2018-04-18
Environmental Conditions:
QAPP Information:	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110045, Pyrethroids Region 3      Bradley Channel
LOE ID:	53656
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to evaluate sediment toxicity. The sample exhibited significant toxicity to both growth and survival of Hyalella azteca. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
Data Reference:	Santa Maria Rotation 2007 2008
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 3 Basin Plan.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates, Second Edition. U.S. Environmental Protection Agency Office of Research and Development, Duluth, MI , U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-600/R-99/064
Guideline Reference:	SWAMP_Memo_Toxicity_Data_Intrepretation
Spatial Representation:	The sample was collected at station 312BCUxxx.
Temporal Representation:	The sample was collected in April 2008.
Environmental Conditions:
QAPP Information:	The SWAMP QAPP (2002) was followed.
QAPP Information Reference(s):

DECISION ID	110007	Region 3
Bradley Channel

Pollutant:	Chlorophyll-a
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	No new data were assessed for the 2020 listing cycle. This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. One of the 81 samples exceed the evaluation guideline used to interpret the narrative water quality objective for bio-stimulation risk. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of the 81 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	14403
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Chlorophyll a.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water quality standards table
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	9897
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Aquatic Life Use:	Cold Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Chlorophyll a.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Objective/Criterion Reference:	Water quality standards table
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	49461
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	10
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 10 samples exceed the criterion for Chlorophyll a.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	Water quality standards table
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-11/8/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	48080
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 36 samples exceed the criterion for Chlorophyll a.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	Water quality standards table
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	14404
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	20
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCWQP Southern Area Ag-Waiver Monitoring (R3_CMPSouth) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Chlorophyll a.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc toxicity data
	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Objective/Criterion Reference:	Water quality standards table
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones Street]
Temporal Representation:	Data was collected over the time period 2/21/2005-11/15/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	49451
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	10
Number of Exceedances:	1
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 1 of 10 samples exceed the criterion for Chlorophyll a.
Data Reference:	Santa Maria Rotation field data 2007-2008
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009.
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	Water quality standards table
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/30/2007-11/8/2007.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	48081
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Water Board Staff assessed public submissions data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 36 samples exceed the criterion for Chlorophyll a.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	Water quality standards table
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCJ - Bradley Channel at Jones St.]
Temporal Representation:	Data was collected over the time period 1/30/2007-3/30/2010.
Environmental Conditions:	Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 110007, Chlorophyll-a Region 3      Bradley Channel
LOE ID:	9898
Pollutant:	Chlorophyll-a
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Aquatic Life Use:	Warm Freshwater Habitat
Number of Samples:	15
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Central Coast Regional Board Staff assessed CCAMP Santa Maria (SantaMaria) data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Chlorophyll a.
Data Reference:	Final Data File used for assessment: CCAMP Water Quality Data_file1
	Final Data File used for assessment: CCAMP Water Quality Data_file2
	Final Data File used for assessment: CCAMP Water Quality Data_file3
SWAMP Data:	SWAMP
Water Quality Objective/Criterion:	Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3)
Objective/Criterion Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Objective/Criterion Reference:	Water quality standards table
Evaluation Guideline:	North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Guideline Reference:	North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ 312BCU-Bradley Channel u/s of ponds at Magellan Drive]
Temporal Representation:	Data was collected over the time period 1/11/2000-2/28/2001. Santa Maria watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. Toxicity monitoring is conducted twice during the rotation year (winter and summer) at a subset of sites.
Environmental Conditions:	Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):

DECISION ID	80575	Region 3
Bradley Channel

Pollutant:	Demeton
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Zero of the 6 water samples exceed the evaluation guideline (National Recommended Water Quality Criteria, 2009) used to interpret the narrative water quality objective for aquatic life. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 6 water samples exceed the evaluation guideline (National Recommended Water Quality Criteria, 2009) used to interpret the narrative water quality objective for aquatic life and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53606
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Demeton.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA National Recomm. WQ criteria, 4-day avg. is 0.1 ug/L.
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 2 monitoring sites [ Bradley Channel at Culvert - 312BCC, Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53607
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Demeton. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA National Recomm. WQ criteria, 4-day avg. is 0.1 ug/L.
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53603
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Demeton.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Demeton criterion continuous concentration for the protection of freshwater aquatic life is 0.1 ug/L (National Recommended Water Quality Criteria, 2009).
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53605
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Demeton.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA National Recomm. WQ criteria, 4-day avg. is 0.1 ug/L.
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53608
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Demeton. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The USEPA National Recomm. WQ criteria, 4-day avg. is 0.1 ug/L.
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80575, Demeton Region 3      Bradley Channel
LOE ID:	53604
Pollutant:	Demeton
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Demeton.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The Demeton criterion continuous concentration for the protection of freshwater aquatic life is 0.1 ug/L (National Recommended Water Quality Criteria, 2009).
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6

DECISION ID	81203	Region 3
Bradley Channel

Pollutant:	Methyl Parathion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment and the pollutant concentration must be associated with toxicity to result in addition of the pollutant to the Section 303(d) list. Four lines of evidence are available in the administrative record to assess this pollutant. Zero of the 6 water samples exceed the evaluation guidelines for aquatic life uses (CDFW, 1992) and drinking water (USEPA drinking water health advisory level). The single sediment sample did not exceed the evaluation guideline (Ding et al., 2011). This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 6 water samples exceed the evaluation guidelines for aquatic life uses (CDFW, 1992) and drinking water (USEPA drinking water health advisory level). The single sediment sample did not exceed the evaluation guideline (Ding et al., 2011). None of these exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53685
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Parathion, methyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53678
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Parathion, methyl.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for Parathion, methyl is 1.8 µg/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water.  An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53676
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Methyl Parathion.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for methyl parathion is the median lethal concentration (LC50) of 6 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 6 ug/g is the geometric mean of LC50 values for methyl parathion from Ding et al. (2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53681
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Parathion, methyl.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game (now called California Department of Fish and Wildlife) instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System. California Department of Fish and Game. Environmental Services Division. Administrative Report 92-1
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53680
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Parathion, methyl.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for Paration, methyl is 1.8 µg/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water.  An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53683
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: None of the three samples exceed the criterion for Parathion, methyl.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game (now called the California Department of Fish and Wildlife) instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [Bradley Channel at Jones - 312BCJ].
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format. The QAPP was provided.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53679
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Municipal & Domestic Supply
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Parathion, methyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for Parathion, methyl is 1.8 µg/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, and 20% relative source contribution from drinking water.  An additional uncertainty factor of 10 is used for Class C carcinogens.
Guideline Reference:	IRIS Database Calculations (summary)
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53686
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Parathion, methyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53684
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	3
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	State Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Parathion, methyl.
Data Reference:	Data from Region 3 Conditional Waiver Cooperative Monitoring Program, Jan. 2007-Jun. 2010
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game (now called the California Department of Fish and Wildlife) instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 2/13/2007-9/25/2007.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The data was collected for the CCRWQCB Cooperative Monitoring Program for Agriculture data and provided in SWAMP format.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53682
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	2
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed CMP data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Parathion, methyl.
Data Reference:	Final Data File used for assessment: Central Coast Water Quality Preservation Inc water quality data
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The California Department of Fish and Game (now called California Department of Fish and Wildlife) instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference:	Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System. California Department of Fish and Game. Environmental Services Division. Administrative Report 92-1
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel - 312BCJ]
Temporal Representation:	Data was collected over the time period 8/22/2006-9/26/2006. Cooperative Monitoring Program (CMP) staff conduct monitoring for conventional pollutants at all Ag Waiver monitoring sites monthly. CMP staff also conduct water toxicity monitoring quarterly and sediment toxicity monitoring annually (in spring).
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the Cooperative Monitoring Program QAPP, (Clark and Ogle 2006). QA data are included in submission. All data are flagged as appropriate.
QAPP Information Reference(s):	Quality Assurance Project Plan for Monitoring for the Region 3 Conditional Ag Waiver Cooperative Monitoring Program, Revision 6
Line of Evidence (LOE) for Decision ID 81203, Methyl Parathion Region 3      Bradley Channel
LOE ID:	53675
Pollutant:	Methyl Parathion
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Methyl Parathion.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for methyl parathion is the median lethal concentration (LC50) of 6 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 6 ug/g is the geometric mean of LC50 values for methyl parathion from Ding et al. (2011).
Guideline Reference:	Toxicity of Sediment-Associated Pesticides to Chironomus dilutus and Hyalella azteca. Arch. Environ. Contam. Toxicol. 61:83¿92.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	80518	Region 3
Bradley Channel

Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status and the pollutant concentration in sediment must be associated with a toxicity to result. Two lines of evidence are available in the administrative record to assess this pollutant. The single sediment sample did not exceed the evaluation guideline (MacDonald et al. 2000) used to protect aquatic life beneficial uses. However, this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sediment sample did not exceed the evaluation guideline for aquatic life protection and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 80518, PCBs (Polychlorinated biphenyls) Region 3      Bradley Channel
LOE ID:	53698
Pollutant:	PCBs (Polychlorinated biphenyls)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for PCB, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of PCBs is 676 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80518, PCBs (Polychlorinated biphenyls) Region 3      Bradley Channel
LOE ID:	53693
Pollutant:	PCBs (Polychlorinated biphenyls)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for PCB, Total.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of PCBs is 676 ug/Kg dry weight (MacDonald et al. 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	80724	Region 3
Bradley Channel

Pollutant:	Parathion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. The single sample did not exceed the evaluation guideline (USEPA National Recommended Water Quality Criteria, 2006) used to interpret the narrative water quality objective for aquatic life. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 80724, Parathion Region 3      Bradley Channel
LOE ID:	53691
Pollutant:	Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Parathion, Ethyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The criterion continuous concentration for Parathion, Ethyl is 0.013 ug/l from the National Recommended Water Quality Criteria. Parathion is synonymous with diethyl parathion and parathion-ethyl
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80724, Parathion Region 3      Bradley Channel
LOE ID:	53692
Pollutant:	Parathion
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Parathion, Ethyl. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The criterion continuous concentration for Parathion, Ethyl is 0.013 ug/l from the National Recommended Water Quality Criteria. Parathion is synonymous with diethyl parathion and parathion-ethyl
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	80517	Region 3
Bradley Channel

Pollutant:	Permethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 of the Listing Policy, a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) list. Five lines of evidence are available in the administrative record to assess this pollutant. The single water sample result was not used in the assessment because the result was a ¿non detect¿ but the laboratory data reporting limit was above the objective and therefore the results could not be quantified. The single sediment sample did not exceed the evaluation guideline (Amweg et al., 2005) used to protect aquatic life. Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification to add this water segment-pollutant combination from the section 303(d) list. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sediment sample did not exceed the evaluation guideline (Amweg et al., 2005) used to protect aquatic life and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 80517, Permethrin Region 3      Bradley Channel
LOE ID:	53701
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of permethrin does not exceed 0.002 ug/L and if the 1-h average concentration does not exceed 0.01 ug/L. In this assessment, the 4-day value was used. Mixtures of permethrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan

DECISION ID	80517	Region 3
Bradley Channel

Pollutant:	Permethrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 of the Listing Policy, a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) list. Five lines of evidence are available in the administrative record to assess this pollutant. The single water sample result was not used in the assessment because the result was a ¿non detect¿ but the laboratory data reporting limit was above the objective and therefore the results could not be quantified. The single sediment sample did not exceed the evaluation guideline (Amweg et al., 2005) used to protect aquatic life. Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification to add this water segment-pollutant combination from the section 303(d) list. This sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sediment sample did not exceed the evaluation guideline (Amweg et al., 2005) used to protect aquatic life and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 80517, Permethrin Region 3      Bradley Channel
LOE ID:	53700
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Permethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80517, Permethrin Region 3      Bradley Channel
LOE ID:	53699
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project Data data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Permethrin.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Water Quality Control Plan for the Central Coastal Basin (CCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. No individual pesticide or combination of pesticides shall reach concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life (Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin from Amweg et al. (2005).
Guideline Reference:	Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan
Line of Evidence (LOE) for Decision ID 80517, Permethrin Region 3      Bradley Channel
LOE ID:	53706
Pollutant:	Permethrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Cold Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed TMDL Project data for Bradley Channel to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Permethrin. The single sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. An arithmetic mean is calculated when replicates, such as field duplicates, are reported. If a non-detect is one of the results, then one half the reporting limit is used in this calculation.
Data Reference:	Data from Santa Maria River Watershed and Oso Flaco Creek Watershed TMDL Monitoring Study
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries).
Objective/Criterion Reference:	Water Quality Control Plan for the Central Coastal Basin
Evaluation Guideline:	UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of permethrin does not exceed 0.002 ug/L and if the 1-h average concentration does not exceed 0.01 ug/L. In this assessment, the 4-day value was used. Mixtures of permethrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference:	Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
Spatial Representation:	Data for this line of evidence for Bradley Channel was collected at 1 monitoring site [ Bradley Channel at River Oaks - 312BRO]
Temporal Representation:	Data was collected on a single day 6/10/2009.
Environmental Conditions:	Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information:	Sampling and analysis was conducted following the SWAMP QAPP 2008.
QAPP Information Reference(s):	Surface Water Ambient Monitoring Program Quality Assurance Program Plan