Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name:	Santa Ysabel Creek
Water Body ID:	CAR9055200020020306092327
Water Body Type:	River & Stream


DECISION ID	17021

Pollutant:	Alkalinity, Carbonate as CaCO3 \| Ammonia \| Biodiversity impacts \| Manganese \| Nickel \| Orthophosphate \| Total Kjeldahl Nitrogen (TKN) \| Total Suspended Solids (TSS)
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

Weight of Evidence:	These pollutants are being considered for placement on the section 303(d) list under section 3.1 and 3.2 and 3.9 of the Listing Policy. Under section 3.1 and 3.2 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess these pollutants. None of the samples exceed the Basin Plan water quality objective for these multiple pollutants. 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. None of the samples exceed the Basin Plan water quality objective for these multiple pollutants and this does not exceed the allowable frequency listed in Table 3.1 and 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.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 17021


LOE ID:	26468

Pollutant:	Biodiversity impacts
LOE Subgroup:	Adverse Biological Responses
Matrix:	Water
Fraction:	None

Beneficial Use:	Warm Freshwater Habitat

Number of Samples:	6
Number of Exceedances:	5

Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Six samples of IBI data were taken from June 2000 to June 2005 at three sampling sites. Of the total number of samples, five of the samples exceeded the IBI impairment threshold.
Data Reference:	Fish and Game IBI Data

Water Quality Objective/Criterion:	From the San Diego Basin Plan the objective is: 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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board. (SDRWQCB, 1995)
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:	The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9)
Guideline Reference:	"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.

Spatial Representation:	Samples were collected at three sites: 905SYCH79, 905SYCNTx, and 905WE0679 on Santa Ysabel Creek.
Temporal Representation:	Sampling occurred during one to two events every other year from June 2000 to June 2005.
Environmental Conditions:
QAPP Information:	Quality Control for collection and identification was conducted in accordance with the Quality Assurance Project Plan for the California Stream Bioassessment Procedure and the State of California, California Monitoring an Assessment Program: "CMAP", Quality Assurance Project Plan.
QAPP Information Reference(s):	State of California, California Monitoring and Assessment Program: "CMAP".
	Quality Assurance Project Plan for the California Stream Bioassessment Pocedure
	The San Diego Stream Team Quality Assurance Project Plan


LOE ID:	26397

Pollutant:	Alkalinity, Carbonate as CaCO3 \| Ammonia \| Manganese \| Nickel \| Orthophosphate \| Total Kjeldahl Nitrogen (TKN) \| Total Suspended Solids (TSS)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Municipal & Domestic Supply

Number of Samples:	30
Number of Exceedances:	0

Data and Information Type:	Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:	30 samples were collected at Santa Ysabel Creek station 911TLAP04 during the months of January 2003, April 2003, and May 2003 for conventional inorganics analyses, none of the 30 samples exceeded evaluation concentrations (SWAMP, 2007).
Data Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Water Quality Objective/Criterion:	Alkalinity as CaCO3 20 mg/l, ammonia as N 0.025 mg/l, nitrite as N 1.mg/l, nitrogen total Kjeldahl (If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used), ortho phosphate as P total 0.05 mg/l, sulfate 250 mg/l, total suspended solids narrative: Waters shall not contain suspended solids in concentrations of solids that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	Samples were collected at Santa Ysabel Creek station 911TLAP04; (Latitude 33.1277, Longitude -116.6790).
Temporal Representation:	Samples were collected during the months of January 2003, April 2003, and May 2003.
Environmental Conditions:
QAPP Information:	Quality controls for chemical analyses were conducted in accordance with the California Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):


DECISION ID	17022

Pollutant:	Metals
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

Weight of Evidence:	These pollutants are 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. One line of evidence is available in the administrative record to assess these pollutants. None of the samples exceed the Basin Plan water quality objectives for these metal pollutants. 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. None of the samples exceed the Basin Plan water quality objectives for these metal pollutants 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.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 17022


LOE ID:	26395

Pollutant:	Metals
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Municipal & Domestic Supply

Number of Samples:	33
Number of Exceedances:	0

Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:	33 samples were collected at Santa Ysabel Creek station 905SDYSA4 during the months of January 2003, April 2003, and May 2003 for metals analyses, none of the 33 samples exceeded evaluation concentrations (SWAMP, 2007).
Data Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Water Quality Objective/Criterion:	The Maximum Contaminant Level (MCL) for aluminum is 1. mg /l (ppb). Water Quality Control for the San Diego Basin. 2007. The dissolved chronic criterion for the following metals applies: arsenic 150 µg/l (ppb), cadmium 2.2 µg/l (ppb), copper 9.0 µg/l (ppb), selenium 5.0 µg/l (ppb), zinc 120 µg/l (ppb), chromium 11 µg/l (ppb), manganese 0.05 mg/l, nickel 52 µg/l (ppb), lead 2.5 µg/l (ppb), and silver 3.4µg/l (ppb). California Toxics Rule. 2007.
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	Water samples were collected at Santa Ysabel Creek station 905SDYSA4; (Latitude 33.1276, Longitude -116.6791).
Temporal Representation:	Samples were collected during the months of January 2003, April 2003, and May 2003.
Environmental Conditions:
QAPP Information:	Quality controls for chemical analyses were conducted in accordance with the California Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):


DECISION ID	17014

Pollutant:	PAHs (Polycyclic Aromatic Hydrocarbons)
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

Weight of Evidence:	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. One line of evidence is available in the administrative record to assess this pollutant. None of the 129 samples exceed the Basin Plan water quality objective for polycyclic aromatic hydrocarbons. 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. None of the 129 samples exceed the Basin Plan water quality objective for polycyclic aromatic hydrocarbons 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.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 17014


LOE ID:	26394

Pollutant:	PAHs (Polycyclic Aromatic Hydrocarbons)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Municipal & Domestic Supply

Number of Samples:	129
Number of Exceedances:	0

Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:	129 samples were collected at Santa Ysabel Creek station 901SJBEL2 during the months of January 2003, April 2003, and May 2003 for Polycyclic Aromatic Hydrocarbons (PAHs) analyses, none of the 129 samples exceeded evaluation concentrations (SWAMP, 2007).
Data Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Water Quality Objective/Criterion:	Water designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the maximum contaminant levels (MCL 0.0002mg/l) specified in California Code of Regulations, Title 22, Table 64444-A of section 64444 (Organic Chemicals) which is incorporated by reference into this plan.
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:
Guideline Reference:

Spatial Representation:	Samples were collected at Santa Ysabel Creek station 901SJBEL2; (Latitude 33.0862, Longitude -116.9166).
Temporal Representation:	Samples were collected during the months of January 2003, April 2003, and May 2003.
Environmental Conditions:
QAPP Information:	Quality controls for chemical analyses were conducted in accordance with the California Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):


DECISION ID	17013

Pollutant:	Toxicity
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Unknown Nonpoint Source \| Unknown Point Source \| Urban Runoff/Storm Sewers
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Weight of Evidence:	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 and 3.9 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Five of the eight samples exceed the water quality objective for toxicity. 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 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. Five of the eight samples exceed the water quality objective for toxicity 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.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 17013


LOE ID:	21396

Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None

Beneficial Use:	Warm Freshwater Habitat

Number of Samples:	6
Number of Exceedances:	5

Data and Information Type:	Ambient toxicity testing (chronic)
Data Used to Assess Water Quality:	Six samples were collected at Santa Ysabel Creek stations 905SDYSA4 and 905SDYSA7 from January to May 2003, they showed significant toxicity levels (SL) in the following tests: Selenastrum algae growth test - five of the six samples. Ceriodaphnia dubia survival/reproductive test - two of the six samples.
Data Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Water Quality Objective/Criterion:	From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:	According to SWAMP, waters are considered toxic when samples show significant toxicity levels (SWAMP code SL) when compared to a negative control. Significant toxicity is determined when statistical tests result in an alpha of less than 5% and percent control values less than the evaluation threshold.
Guideline Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Spatial Representation:	Water samples were collected at a station on Santa Ysabel Creek 4 (905SDYSA4) and Santa Ysabel Creek 4 (905SDYSA7).
Temporal Representation:	Water samples from Santa Ysabel Creek were collected on January 2003, April 2003, and May 2003.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):


LOE ID:	30289

Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Sediment
Fraction:	None

Beneficial Use:	Warm Freshwater Habitat

Number of Samples:	2
Number of Exceedances:	0

Data and Information Type:	Ambient toxicity testing (chronic)
Data Used to Assess Water Quality:	Two samples were collected at Santa Ysabel Creek station 905SDYSA4 in January and April 2003, they showed significant toxicity levels (SL) in the following tests: Hyalella azteca survival and growth- None of the two samples were toxic.
Data Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Water Quality Objective/Criterion:	From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:	According to SWAMP, waters are considered toxic when samples show significant toxicity levels (SWAMP code SL) when compared to a negative control. Significant toxicity is determined when statistical tests result in an alpha of less than 5% and percent control values less than the evaluation threshold.
Guideline Reference:	Surface Water Ambient Monitoring Program. 2007. Monitoring data for Region 9.

Spatial Representation:	Sediment samples were collected at a station on Santa Ysabel Creek 4 (905SDYSA4).
Temporal Representation:	Sample from Santa Ysabel Creek were collected on January 2003 and April 2003.
Environmental Conditions:
QAPP Information:	Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s):


LOE ID:	26468

Pollutant:	Biodiversity impacts
LOE Subgroup:	Adverse Biological Responses
Matrix:	Water
Fraction:	None

Beneficial Use:	Warm Freshwater Habitat

Number of Samples:	6
Number of Exceedances:	5

Data and Information Type:	Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:	Six samples of IBI data were taken from June 2000 to June 2005 at three sampling sites. Of the total number of samples, five of the samples exceeded the IBI impairment threshold.
Data Reference:	Fish and Game IBI Data

Water Quality Objective/Criterion:	From the San Diego Basin Plan the objective is: 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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board. (SDRWQCB, 1995)
Objective/Criterion Reference:	Regional Water Quality Control Board, 2007. Water Quality Control Plan for the San Diego Basin (9).

Evaluation Guideline:	The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9)
Guideline Reference:	"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.

Spatial Representation:	Samples were collected at three sites: 905SYCH79, 905SYCNTx, and 905WE0679 on Santa Ysabel Creek.
Temporal Representation:	Sampling occurred during one to two events every other year from June 2000 to June 2005.
Environmental Conditions:
QAPP Information:	Quality Control for collection and identification was conducted in accordance with the Quality Assurance Project Plan for the California Stream Bioassessment Procedure and the State of California, California Monitoring an Assessment Program: "CMAP", Quality Assurance Project Plan.
QAPP Information Reference(s):	State of California, California Monitoring and Assessment Program: "CMAP".
	Quality Assurance Project Plan for the California Stream Bioassessment Pocedure
	The San Diego Stream Team Quality Assurance Project Plan