Water Body Name: | Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
Water Body ID: | CAR4031200020000228111202 |
Water Body Type: | River & Stream |
DECISION ID |
136554 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Chlordane |
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: | A Source Unknown |
TMDL Name: | Calleguas Creek PCBs (7) |
TMDL Project Code: | 360 |
Date TMDL Approved by USEPA: | 03/24/2006 |
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, 4.1 and 4.5 of the Listing Policy. Under section 4.1 and 4.5 of the Policy, a minimum of one line of evidence is needed to assess listing status. 5 lines of evidence are available in the administrative record to assess this pollutant. 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. 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. 7 of 9 and 7 of 9 samples exceeded the criteria and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The TMDL for Organochlorine (OC) Pesticides, Polychlorinated Biphenyls (PCBs) and Siltation in Calleguas Creek, Its Tributaries, and Mugu Lagoon was approved by USEPA on 03/24/2006. 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. |
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LOE ID: | 83310 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 3 of 5 samples exceed the criterion for Chlordane, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
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LOE ID: | 267649 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 267529 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 4 of the 4 samples exceeded the water quality threshold for Total Chlordane. Although a total of 21 samples were collected, 17 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 83297 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 3 of 5 samples exceed the criterion for Chlordane, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
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LOE ID: | 267654 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 267528 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 4 of the 4 samples exceeded the water quality threshold for Total Chlordane. Although a total of 21 samples were collected, 17 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0043 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 2072 | ||||
Pollutant: | Chlordane (tissue) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
149465 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) |
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: | Nonpoint Source |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 01/01/2005 |
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 3.1 of the Listing Policy. Under 3.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. 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. 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. 0 of 0, 0 of 0, 13 of 13 and 20 of 24 samples exceeded the CRITERIA and these exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. The Calleguas Creek Historic Pesticides TMDL was approved by USEPA on 1/1/2005. 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 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: | |
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LOE ID: | 259856 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 259887 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 8 of the 8 samples exceeded the water quality threshold for DDT(p,p'). Although a total of 21 samples were collected, 13 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 259803 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 8 of the 8 samples exceeded the water quality threshold for DDT(p,p'). Although a total of 21 samples were collected, 13 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 259939 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
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LOE ID: | 4045 | ||||
Pollutant: | DDT (tissue & sediment) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference pre-2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Unspecified | ||||
Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) | ||||
Evaluation Guideline: | Unspecified | ||||
Guideline Reference: | Placeholder reference pre-2006 303(d) | ||||
Spatial Representation: | Unspecified | ||||
Temporal Representation: | Unspecified | ||||
Environmental Conditions: | Unspecified | ||||
QAPP Information: | Unspecified | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 2070 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Eleven water samples, 7 samples exceeding (SWRCB, 2003). | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | California Toxics Rule: 0.001 ug/L. | ||||
Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Three sites. | ||||
Temporal Representation: | Summer, fall, winter, spring in 1998 and 1999. | ||||
Environmental Conditions: | |||||
QAPP Information: | Calleguas Creek Characterization Study | ||||
QAPP Information Reference(s): | |||||
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|||||
LOE ID: | 83173 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 5 of 5 samples exceed the criterion for DDT(p,p). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83187 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 5 of 5 samples exceed the criterion for DDT(p,p). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDT criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136559 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Dieldrin |
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: | A Source Unknown |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 03/04/2006 |
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 4.1 of the Listing Policy. Under section 4.1 a single line of evidence are necessary to assess listing status. Five lines of evidence are available in the administrative record to assess this pollutant. 0 of the 2 samples exceeded the criteria. 0 of the 2 samples exceeded the criteria. 0 of the 26 samples exceeded the criteria. 0 of the 26 samples exceeded the criteria. Line of evidence 2078 is a placeholder for a decision to list made prior to 2006. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for removing this water segment-pollutant combination from 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. 0 of 2, 0 of 2, 0 of 26 and 0 of 26 samples exceeded the criteria and 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 28 samples is needed to determine if a beneficial use is fully supported using table 4.1. 4. The Calleguas Creek Historic Pesticides was approved by USEPA on 03/04/2006. 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: | pollutant combination should not be removed from the section 303(d) list because there was a previous listing and there are not enough data to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | |
|
|||||
LOE ID: | 260347 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Dieldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260633 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Dieldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260407 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Dieldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260588 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Dieldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83227 | ||||
Pollutant: | Dieldrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Dieldrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83236 | ||||
Pollutant: | Dieldrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Dieldrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 2078 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a listing decision made by USEPA for 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
136569 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | PCBs (Polychlorinated biphenyls) |
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: | Nonpoint Source | Point Source |
TMDL Name: | Calleguas Creek PCBs (7) |
TMDL Project Code: | 360 |
Date TMDL Approved by USEPA: | 01/01/2005 |
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 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Five lines of evidence are available in the administrative record to assess this pollutant. 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. 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 of the Policy. 2. The data used satisfies the data quantity requirements of section 6of the Policy. 3. 0 of 0, 0 of 0, 0 of 0, 0 of 0 and 0 of 0 sample exceeded the criteria and this is insufficient to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy A minimum of 28 samples is needed to determine if a beneficial use is fully supported using table 4.1. 4. The Calleguas Creek PCBs TMDL was approved by the RWQCB in July of 2005 and subsequently approved by USEPA. 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 not be removed from the section 303(d) list because there was a previous listing and there are not enough data to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | |
|
|||||
LOE ID: | 264428 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The PCB, total aroclors criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.014 ug/L. This value corresponds to the sum of aroclors 1242, 1254, 1221, 1232, 1248, 1260, and 1016 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 2077 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) (tissue) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 264520 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The PCB, total aroclors criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.014 ug/L. This value corresponds to the sum of aroclors 1242, 1254, 1221, 1232, 1248, 1260, and 1016 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264500 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The PCB, total aroclors criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.014 ug/L. This value corresponds to the sum of aroclors 1242, 1254, 1221, 1232, 1248, 1260, and 1016 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264543 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The PCB, total aroclors criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.014 ug/L. This value corresponds to the sum of aroclors 1242, 1254, 1221, 1232, 1248, 1260, and 1016 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136572 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Toxaphene |
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: | Nonpoint Source |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 01/01/2005 |
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. 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. 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. 0 of 0, 0 of 0, 10 of 10, 10 of 10, and 0 of 0 samples exceeded the OBJECTIVE and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Calleguas Creek Pesticides TMDL was approved by USEPA on 1/1/2005. 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: | |
|
|||||
LOE ID: | 267920 | ||||
Pollutant: | Toxaphene | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 267746 | ||||
Pollutant: | Toxaphene | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 8 of the 8 samples exceeded the water quality threshold for Toxaphene. Although a total of 20 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 Section 6.1.5.5. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83271 | ||||
Pollutant: | Toxaphene | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Toxaphene. Three sample result(s) were 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. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 2076 | ||||
Pollutant: | Toxaphene (tissue & sediment) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 267942 | ||||
Pollutant: | Toxaphene | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 8 of the 8 samples exceeded the water quality threshold for Toxaphene. Although a total of 20 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 Section 6.1.5.5. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 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 (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 267725 | ||||
Pollutant: | Toxaphene | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83289 | ||||
Pollutant: | Toxaphene | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Toxaphene. Three sample result(s) were 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. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0002 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136582 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Aldrin |
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. 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. 0 of 2, 0 of 2, 0 of 26 and 0 of 26 samples exceeded the CRITERIA 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: | |
|
|||||
LOE ID: | 83248 | ||||
Pollutant: | Aldrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Aldrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration to protect aquatic life in freshwater is 3 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 256413 | ||||
Pollutant: | Aldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Aldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in freshwater is 1.5 ug/L. The criterion of 3 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 256428 | ||||
Pollutant: | Aldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Aldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in freshwater is 1.5 ug/L. The criterion of 3 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 256440 | ||||
Pollutant: | Aldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Aldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in freshwater is 1.5 ug/L. The criterion of 3 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 256446 | ||||
Pollutant: | Aldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Aldrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in freshwater is 1.5 ug/L. The criterion of 3 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83262 | ||||
Pollutant: | Aldrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Aldrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The aldrin criterion maximum concentration to protect aquatic life in freshwater is 3 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136551 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 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. 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. 0 of 23 and 0 of 23 samples exceeded the criteria 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: | |
|
|||||
LOE ID: | 257568 | ||||
Pollutant: | Arsenic | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Arsenic. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 257455 | ||||
Pollutant: | Arsenic | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Arsenic. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136552 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 257383 | ||||
Pollutant: | Atrazine | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Atrazine. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of < 1 ug/L for a nonvascular plant (acute). The benchmark was derived from a 'less-than' value (for example, <1,500) and may underestimate toxicity. | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 257405 | ||||
Pollutant: | Atrazine | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Atrazine. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of < 1 ug/L for a nonvascular plant (acute). The benchmark was derived from a 'less-than' value (for example, <1,500) and may underestimate toxicity. | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136586 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 257876 | ||||
Pollutant: | Bensulide | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Bensulide. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 257863 | ||||
Pollutant: | Bensulide | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Bensulide. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
DECISION ID |
151082 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Benthic Community Effects |
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: | Benthic Community Effects are being considered for placement on the CWA section 303(d) List under sections 3.9 of the Listing Policy. Under section 3.9, additional lines of evidence (LOEs) associating the Benthic Community Effects decision with a water or sediment concentration of pollutants other than benthic-macroinvertebrate bioassessment or habitat assessment LOEs are necessary to place a water body on the 303(d) List for Benthic Community Effects. One line of evidence evaluating benthic-macroinvertebrate bioassessment data is/are available in the administrative record to assess this indicator. One of one benthic-macroinvertebrate samples exceed the California Stream Condition Index (CSCI) impairment threshold. However, a minimum of two benthic-macroinvertebrate samples are needed to assess listing status. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing Benthic Community Effects in this waterbody segment 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 one benthic-macroinvertebrate bioassessment samples had CSCI scores below 0.79. The available information is insufficient to determine whether the waterbody/pollutant combination should be placed on the 303(d) List of impaired waters at this time. 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: | |
|
|||||
LOE ID: | 305411 | ||||
Pollutant: | Benthic-Macroinvertebrate Bioassessments | ||||
LOE Subgroup: | Population/Community Degradation | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | Benthic macroinvertebrate surveys | ||||
Data Used to Assess Water Quality: | Water Board staff assessed data for 408CAL004 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.290052583 to 0.290052583. | ||||
Data Reference: | California Stream Condition Index (CSCI) Scores for the 2024 Integrated Report for Region 4. | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use. | ||||
Guideline Reference: | Bioassessment in complex environments: designing an index for consistent meaning in different settings | ||||
Spatial Representation: | Samples were collected from station 408CAL004. | ||||
Temporal Representation: | Samples were collected from 10/31/2001 to 10/31/2001. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data were collected using Surface Water Ambient Monitoring Program protocols | ||||
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 |
136553 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 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. 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. 0 of 23 and 0 of 23 samples exceeded the criteria 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: | |
|
|||||
LOE ID: | 257962 | ||||
Pollutant: | Cadmium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Cadmium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 258128 | ||||
Pollutant: | Cadmium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Cadmium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136555 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Chlorpyrifos |
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 are necessary to assess listing status. 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. 1 of 2, 1 of 2, 0 of 1, 0 of 1, 2 of 26 and 2 of 26 samples exceeded the CRITERIA 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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LOE ID: | 258457 | ||||
Pollutant: | Chlorpyrifos | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
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LOE ID: | 258383 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 21 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 258267 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 258347 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 21 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 258228 | ||||
Pollutant: | Chlorpyrifos | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
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LOE ID: | 258255 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Chlorpyrifos. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
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LOE ID: | 83323 | ||||
Pollutant: | Chlorpyrifos | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chlorpyrifos. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater criterion continuous concentration to protect aquatic organisms is 0.014 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 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
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LOE ID: | 83324 | ||||
Pollutant: | Chlorpyrifos | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chlorpyrifos. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater criterion continuous concentration to protect aquatic organisms is 0.014 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 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136583 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 96218 and 83334 has been replaced by LOE 310136 and 310106 due to reassessment of data using a different Evaluation Guideline. |
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. |
|
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LOE ID: | 310136 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 259425 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 259329 | ||||
Pollutant: | Cyfluthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 259446 | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 259232 | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 310106 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cyfluthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
152551 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 83336 & 83337 has been replaced by LOE 310519 & 310535 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310535 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310519 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Lambda-cyhalothrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136584 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 310033 | ||||
Pollutant: | Deltamethrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310098 | ||||
Pollutant: | Deltamethrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 260212 | ||||
Pollutant: | Deltamethrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260308 | ||||
Pollutant: | Deltamethrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 21 samples were collected, 21 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260117 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260252 | ||||
Pollutant: | Deltamethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for deltamethrin is the USEPA Aquatic Life Benchmark of 0.000026 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136557 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Diazinon |
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 are necessary to assess listing status. 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. 0 of 2, 0 of 2, 1 of 26 and 1 of 26 samples exceeded the CRITERIA 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 260265 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 21 samples exceeded the water quality threshold for Diazinon. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater chronic value for diazinon is 0.10 ug/L (4 day average)(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 | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260300 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Diazinon. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater chronic value for diazinon is 0.10 ug/L (4 day average)(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 | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260260 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 21 samples exceeded the water quality threshold for Diazinon. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater chronic value for diazinon is 0.10 ug/L (4 day average)(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 | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83213 | ||||
Pollutant: | Diazinon | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83214 | ||||
Pollutant: | Diazinon | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 260257 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Diazinon. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The freshwater chronic value for diazinon is 0.10 ug/L (4 day average)(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 | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136558 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 310314 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310346 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 260441 | ||||
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 Surface Water Monitoring Project data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 260401 | ||||
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 Surface Water Monitoring Project data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dichlorvos is the USEPA Aquatic Life Benchmark of 0.0058 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
DECISION ID |
152548 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Dicofol |
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: | 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. LOE 83225 & 83226 has been replaced by LOE 310429 & 310431 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310429 | ||||
Pollutant: | Dicofol | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dicofol. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dicofol is the USEPA Aquatic Life Benchmark of 4.4 ug/L for a fish (chronic). | ||||
Guideline Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310431 | ||||
Pollutant: | Dicofol | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Dicofol. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dicofol is the USEPA Aquatic Life Benchmark of 4.4 ug/L for a fish (chronic). | ||||
Guideline Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136560 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Endosulfan sulfate |
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 are necessary to assess listing status. 4 lines of evidence are available in the administrative record to assess this pollutant. 0 of 2 samples exceeded the CRITERIA. 0 of 2 samples exceeded the CRITERIA. 0 of 26 samples exceeded the CRITERIA. 0 of 26 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 2, 0 of 2, 0 of 26 and 0 of 26 samples exceeded the CRITERIA and 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 fully supported using 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 because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | |
|
|||||
LOE ID: | 260774 | ||||
Pollutant: | Endosulfan sulfate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan Sulfate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA National Recommended Water Quality Criteria toxicity threshold for endosulfan sulfate for freshwater aquatic life protection is 0.056 ug/l (24 hour average) | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83280 | ||||
Pollutant: | Endosulfan sulfate | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endosulfan Sulfate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life 24 hour average maximum for endosulfan sulfate is 0.056 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83279 | ||||
Pollutant: | Endosulfan sulfate | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endosulfan Sulfate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life 24 hour average maximum for endosulfan sulfate is 0.056 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 260930 | ||||
Pollutant: | Endosulfan sulfate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan Sulfate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA National Recommended Water Quality Criteria toxicity threshold for endosulfan sulfate for freshwater aquatic life protection is 0.056 ug/l (24 hour average) | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260733 | ||||
Pollutant: | Endosulfan sulfate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan Sulfate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA National Recommended Water Quality Criteria toxicity threshold for endosulfan sulfate for freshwater aquatic life protection is 0.056 ug/l (24 hour average) | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260819 | ||||
Pollutant: | Endosulfan sulfate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan Sulfate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA National Recommended Water Quality Criteria toxicity threshold for endosulfan sulfate for freshwater aquatic life protection is 0.056 ug/l (24 hour average) | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136561 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status. 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. 0 of 2, 0 of 2, 0 of 26 and 0 of 26 samples exceeded the CRITERIA 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 261232 | ||||
Pollutant: | Endrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 261060 | ||||
Pollutant: | Endrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 261101 | ||||
Pollutant: | Endrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 261138 | ||||
Pollutant: | Endrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endrin. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83287 | ||||
Pollutant: | Endrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83299 | ||||
Pollutant: | Endrin | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endrin. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.036 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
152553 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 83302, 83301, 83312 & 83313 has been replaced by LOE 310331 & 310197 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310197 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310331 | ||||
Pollutant: | Esfenvalerate/Fenvalerate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Esfenvalerate | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136581 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 83315 and 83314 has been replaced by LOE 310513 and 310491 due to reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310513 | ||||
Pollutant: | Ethoprop | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Ethoprop. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 261557 | ||||
Pollutant: | Ethoprop | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 261540 | ||||
Pollutant: | Ethoprop | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ethoprop. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 310491 | ||||
Pollutant: | Ethoprop | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Ethoprop. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
152552 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Fenpropathrin |
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: | 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. LOE 83325 & 83316 has been replaced by LOE 310561 & 310633 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310561 | ||||
Pollutant: | Fenpropathrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310633 | ||||
Pollutant: | Fenpropathrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.0015 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
152547 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Fenvalerate |
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. |
|
|||||
LOE ID: | 310675 | ||||
Pollutant: | Fenvalerate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Fenvalerate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for fenvalerate is the LC50 of 1.13 ug/L for fathead minnow, Pimephales promelas. (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310693 | ||||
Pollutant: | Fenvalerate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Fenvalerate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for fenvalerate is the LC50 of 1.13 ug/L for fathead minnow, Pimephales promelas. (USEPA Office of Pesticide Programs Ecotoxicity database) | ||||
Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136575 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Imidacloprid |
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. |
|
|||||
LOE ID: | 262351 | ||||
Pollutant: | Imidacloprid | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Imidacloprid. 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of imidacloprid does not exceed 0.016 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 262352 | ||||
Pollutant: | Imidacloprid | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Imidacloprid. 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of imidacloprid does not exceed 0.016 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
DECISION ID |
136562 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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. 0 of 23 and 0 of 23 samples exceeded the criteria 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: | |
|
|||||
LOE ID: | 262969 | ||||
Pollutant: | Lead | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Lead. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 263083 | ||||
Pollutant: | Lead | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Lead. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136563 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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. 0 of 2, 0 of 2, 0 of 26 and 0 of 26 samples exceeded the CRITERIA 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: | |
|
|||||
LOE ID: | 262155 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for HCH, gamma-. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane, gamma-HCH) criterion maximum concentration to protect aquatic life in freshwater is 0.95 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83363 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for BHC, gamma(Lindane). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane) criterion maximum concentration to protect aquatic life in freshwater is 0.95 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83350 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for BHC, gamma(Lindane). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane) criterion maximum concentration to protect aquatic life in freshwater is 0.95 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 262177 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for HCH, gamma-. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane, gamma-HCH) criterion maximum concentration to protect aquatic life in freshwater is 0.95 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 262153 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for HCH, gamma-. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane, gamma-HCH) criterion maximum concentration to protect aquatic life in freshwater is 0.95 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 262176 | ||||
Pollutant: | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for HCH, gamma-. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The gamma-BHC (Lindane, gamma-HCH) criterion maximum concentration to protect aquatic life in freshwater is 0.95 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
149463 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Mercury |
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 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. 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. 0 of 23, 0 of 23, 0 of 23 and 0 of 23 samples exceeded the 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 because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | |
|
|||||
LOE ID: | 263443 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Mercury. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 263382 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Mercury. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 263186 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Mercury. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 263187 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Mercury. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L. | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136578 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | Four lines of evidence are available in the administrative record to assess this pollutant. LOEs 83177 and 83176 have been replaced by LOEs 310628 and 310626, respectively, due to a reassessment of data using the U.S. EPA aquatic life benchmark. 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. |
|
|||||
LOE ID: | 263526 | ||||
Pollutant: | Methidathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 263543 | ||||
Pollutant: | Methidathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Methidathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 310626 | ||||
Pollutant: | Methidathion | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methidathion. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-09-16 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310628 | ||||
Pollutant: | Methidathion | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Methidathion. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-09-16 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136565 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(2018) |
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. |
|
|||||
LOE ID: | 264419 | ||||
Pollutant: | Methyl Parathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Parathion, Methyl. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The California Department of Fish and Game instantaneous aquatic life criterion 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: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 264685 | ||||
Pollutant: | Methyl Parathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Parathion, Methyl. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The California Department of Fish and Game instantaneous aquatic life criterion 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: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 83191 | ||||
Pollutant: | Methyl Parathion | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Parathion, methyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The Dept. of Fish and Game instantaneous criteria for methyl parathion is 0.08 ug/L. | ||||
Guideline Reference: | Hazard Assessment of the Synthetic Pyrethroid Insecticides Bifenthrin, Cypermethrin, Esfenvalerate, and Permethrin to Aquatic Organisms in the Sacramento-San Joaquin River System. California Department of Fish and Game. Office of Spill Prevention and Response, Administrative Report 00-6 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83192 | ||||
Pollutant: | Methyl Parathion | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Parathion, methyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The Dept. of Fish and Game instantaneous criteria for methyl parathion is 0.08 ug/L. | ||||
Guideline Reference: | Hazard Assessment of the Synthetic Pyrethroid Insecticides Bifenthrin, Cypermethrin, Esfenvalerate, and Permethrin to Aquatic Organisms in the Sacramento-San Joaquin River System. California Department of Fish and Game. Office of Spill Prevention and Response, Administrative Report 00-6 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136566 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 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. 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. 0 of 23 and 0 of 23 samples exceeded the criteria 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: | |
|
|||||
LOE ID: | 263907 | ||||
Pollutant: | Nickel | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Nickel. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264062 | ||||
Pollutant: | Nickel | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Nickel. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136567 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 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. 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. 0 of 2, 0 of 2, 0 of 1, 0 of 1, 0 of 21 and 0 of 21 samples exceeded the 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 because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | |
|
|||||
LOE ID: | 264398 | ||||
Pollutant: | Organophosphate Pesticides | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 264340 | ||||
Pollutant: | Organophosphate Pesticides | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264339 | ||||
Pollutant: | Organophosphate Pesticides | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264230 | ||||
Pollutant: | Organophosphate Pesticides | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 264359 | ||||
Pollutant: | Organophosphate Pesticides | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264289 | ||||
Pollutant: | Organophosphate Pesticides | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Organophosphorus Pesticides. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for the protection of aquatic life from the additive effects of the organophosphate 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
152549 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 83238 has been replaced by LOE 310906 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310906 | ||||
Pollutant: | Phorate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Phorate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310910 | ||||
Pollutant: | Phorate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Phorate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
152550 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. LOE 83255 & 83256 has been replaced by LOE 310747 & 310781 due to a reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310747 | ||||
Pollutant: | Phosmet | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Phosmet. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for phosmet is the USEPA Aquatic Life Benchmark of 0.75 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-09-16 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310781 | ||||
Pollutant: | Phosmet | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Phosmet. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for phosmet is the USEPA Aquatic Life Benchmark of 0.75 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-09-16 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136579 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 265496 | ||||
Pollutant: | Prometryn | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Prometryn. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 265498 | ||||
Pollutant: | Prometryn | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Prometryn. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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 (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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136571 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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: | 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. |
|
|||||
LOE ID: | 266583 | ||||
Pollutant: | Simazine | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Simazine. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 266544 | ||||
Pollutant: | Simazine | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Simazine. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2010-12-19 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136573 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 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. 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. 0 of 23 and 0 of 23 samples exceeded the OBJECTIVE/GUIDELINE/CRITERIA 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: | |
|
|||||
LOE ID: | 268431 | ||||
Pollutant: | Zinc | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Zinc. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 268381 | ||||
Pollutant: | Zinc | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality threshold for Zinc. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136556 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | alpha-Endosulfan (Endosulfan 1) |
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 section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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. 0 of 2, 0 of 2, 0 of 21 and 0 of 21 samples exceeded the CRITERIA 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: | |
|
|||||
LOE ID: | 260940 | ||||
Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan I. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 261006 | ||||
Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan I. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 261007 | ||||
Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan I. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260959 | ||||
Pollutant: | alpha-Endosulfan (Endosulfan 1) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan I. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136568 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | beta-Endosulfan (Endosulfan 2) |
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 section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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. 0 of 2, 0 of 2, 0 of 21 and 0 of 21 samples exceeded the CRITERIA 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: | |
|
|||||
LOE ID: | 260702 | ||||
Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan II. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260653 | ||||
Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan II. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260724 | ||||
Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality threshold for Endosulfan II. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 260651 | ||||
Pollutant: | beta-Endosulfan (Endosulfan 2) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Endosulfan II. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136576 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Bifenthrin |
Final Listing Decision: | 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 |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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. LOEs 83296 and 83295 have been replaced by LOEs 309946 and 310051, respectively, due to a reassessment of data using the U.S. EPA aquatic life benchmark 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. 3 of 3 and 3 of 3 samples exceed the criteria 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: | |
|
|||||
LOE ID: | 257869 | ||||
Pollutant: | Bifenthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 257787 | ||||
Pollutant: | Bifenthrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 21 samples were collected, 18 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 310051 | ||||
Pollutant: | Bifenthrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 257853 | ||||
Pollutant: | Bifenthrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 21 samples were collected, 18 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 257802 | ||||
Pollutant: | Bifenthrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 309946 | ||||
Pollutant: | Bifenthrin | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Bifenthrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
136577 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Cypermethrin |
Final Listing Decision: | 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 |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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. LOEs 96217 and 83346 have been replaced by LOEs 310142 and 310141, respectively, due to a reassessment of data using the U.S. EPA aquatic life benchmark. 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. 4 of 4 and 4 of 4 samples exceed the CRITERIA 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: | |
|
|||||
LOE ID: | 259614 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 310142 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Cypermethrin. Although a total of 5 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310141 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Cypermethrin. Although a total of 5 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 259469 | ||||
Pollutant: | Cypermethrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 3 of the 3 samples exceeded the water quality threshold for Cypermethrin. Although a total of 21 samples were collected, 18 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 259479 | ||||
Pollutant: | Cypermethrin | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 3 of the 3 samples exceeded the water quality threshold for Cypermethrin. Although a total of 21 samples were collected, 18 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 259244 | ||||
Pollutant: | Cypermethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) 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 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Cypermethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136580 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Dimethoate |
Final Listing Decision: | 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 |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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. 4 lines of evidence are available in the administrative record to assess this pollutant. 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. 2 of 5 and 2 of 5 samples exceed the benchmark listed in the evaluation guideline in water and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy for cold and warm freshwater habitat. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. LOE 83251 and 83250 has been replaced by LOE 310208 and 310209 due to reassessment of data using updated USEPA Aquatic Life Benchmark. |
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. |
|
|||||
LOE ID: | 310208 | ||||
Pollutant: | Dimethoate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 5 samples exceeded the water quality threshold for Dimethoate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310209 | ||||
Pollutant: | Dimethoate | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 5 samples exceeded the water quality threshold for Dimethoate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2008-01-05 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 260639 | ||||
Pollutant: | Dimethoate | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 260359 | ||||
Pollutant: | Dimethoate | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Dimethoate. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The evaluation guideline for dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic). | ||||
Guideline Reference: | OPP Aquatic Life Benchmarks | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-08-09 and 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
DECISION ID |
136564 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Malathion |
Final Listing Decision: | 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 |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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. 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. 0 of 2, 0 of 2, 0 of 0, 0 of 0, 3 of 26 and 3 of 26 samples exceed the CRITERIA 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: | |
|
|||||
LOE ID: | 83365 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 5 samples exceed the criterion for Malathion. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103. | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 262889 | ||||
Pollutant: | Malathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 262871 | ||||
Pollutant: | Malathion | ||||
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 Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2011-08-09 to 2011-08-09 | ||||
Environmental Conditions: | |||||
QAPP Information: | Department of Pesticide Regulation Environmental Monitoring Branch Surface Water Protection Program. 2018. STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern. | ||||
QAPP Information Reference(s): | STUDY 270: Ambient Surface Water and Mitigation Monitoring in Urban Areas in Southern | ||||
|
|||||
LOE ID: | 263022 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Malathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 263130 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Malathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-12-19 and 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 262891 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 21 samples exceeded the water quality threshold for Malathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 83175 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 5 samples exceed the criterion for Malathion. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103. | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 262933 | ||||
Pollutant: | Malathion | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 21 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 2 of 21 samples exceeded the water quality threshold for Malathion. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic life should not be affected unacceptably if the 4-day average concentration of malathion does not exceed 0.028 ug/L (UC Davis Aquatic Life Criteria). | ||||
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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136585 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Permethrin |
Final Listing Decision: | 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 |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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 are necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. LOEs 83228 and 83217 have been replaced by LOEs 310869 and 310934, respectively, due to a reassessment of data using the U.S. EPA aquatic life benchmark. 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 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. 2 of 2 and 2 of 2 samples exceeded the criteria 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: | |
|
|||||
LOE ID: | 310934 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 5 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310869 | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 5 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 264736 | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 21 samples were collected, 20 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264981 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264982 | ||||
Pollutant: | Permethrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 2 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-12-19 to 2012-01-23 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 264815 | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 21 samples were collected, 20 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Water Quality Criteria Report for Permethrin | ||||
Spatial Representation: | The samples were collected at 1 monitoring site (02D_BROOM). | ||||
Temporal Representation: | Data for this waterbody was collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136574 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Pyrethroids |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | New Decision |
Revision Status | Revised |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2037 |
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. 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. 0 of 0, 0 of 0, 6 of 6 and 6 of 6 samples exceed the GUIDELINE 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: | After review of the available data and information, SWRCB 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. |
|
|||||
LOE ID: | 265839 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 6 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 6 of 6 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-03-20 and 2014-12-12 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 265894 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 6 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 6 of 6 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2011-03-20 and 2014-12-12 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 310983 | ||||
Pollutant: | Pyrethroids | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2009-02-06 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 311007 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310903 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. 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: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2008-01-05 to 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 310984 | ||||
Pollutant: | Pyrethroids | ||||
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 ILRP 2007-2009 data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2009-02-06 and 2009-02-06 | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 265671 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 23 samples were collected, 23 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 265457 | ||||
Pollutant: | Pyrethroids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
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 Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 23 samples were collected, 23 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: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used. | ||||
Guideline Reference: | Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges | ||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | Data for this waterbody were collected over the date range 2010-11-09 to 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
149464 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Nitrogen, Nitrate |
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: | A Source Unknown |
TMDL Name: | Calleguas Creek Nitrogen (1) |
TMDL Project Code: | 228 |
Date TMDL Approved by USEPA: | 07/16/2003 |
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. 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. 14 of 15 and 14 of 15 samples exceed the OBJECTIVE 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: | |
|
|||||
LOE ID: | 302327 | ||||
Pollutant: | Nitrogen, Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
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: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 14 of 15 samples exceeded the water quality threshold for Nitrate as N. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2012-02-01 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 302462 | ||||
Pollutant: | Nitrogen, Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
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: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 14 of 15 samples exceeded the water quality threshold for Nitrate as N. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | The samples were collected at 1 monitoring site: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2012-02-01 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
136570 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Selenium |
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 | Major Municipal Point Source-dry and/or wet weather discharge | Natural Sources | Other Urban Runoff | See TMDL documentation |
TMDL Name: | Calleguas Creek Metals (6) |
TMDL Project Code: | 359 |
Date TMDL Approved by USEPA: | 03/26/2007 |
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 4.1of the Policy, a minimum of one line of evidence is needed to assess listing status. 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. 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. 20 of 23, 20 of 23, 20 of 23 and 20 of 23 samples exceed the criteria and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The TMDL for Metals and Selenium in Calleguas Creek, its Tributaries and Mugu Lagoon was approved by USEPA on 3/26/2007. 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: | |
|
|||||
LOE ID: | 266201 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 20 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 20 of 23 samples exceeded the water quality threshold for Selenium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 266189 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 20 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 20 of 23 samples exceeded the water quality threshold for Selenium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 266034 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 20 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 20 of 23 samples exceeded the water quality threshold for Selenium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
|
|||||
LOE ID: | 266147 | ||||
Pollutant: | Selenium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 23 | ||||
Number of Exceedances: | 20 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed Calleguas Creek TMDL Work Plan Monitoring data for Calleguas Creek Reach 2 (Estuary to Potrero Rd.) to determine beneficial use support and results are as follows: 20 of 23 samples exceeded the water quality threshold for Selenium. | ||||
Data Reference: | WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 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: 02D_BROOM (CCWTMP_Discharge to Calleguas Creek at Broome Ranch Rd.). | ||||
Temporal Representation: | The samples were collected between the dates of 2010-11-09 and 2016-05-03 | ||||
Environmental Conditions: | |||||
QAPP Information: | LARRY WALKER ASSOCIATES. 2020. Calleguas Creek Watershed Management Plan. | ||||
QAPP Information Reference(s): | Calleguas Creek Watershed Management Plan | ||||
DECISION ID |
68344 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Indicator Bacteria |
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)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2006 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal from the section 303(d) list under section 4.3 of the Listing Policy. Under section 4.3 a single line of evidence is necessary to assess delisting status. One line of evidence is available in the administrative record to assess this pollutant. A large number of samples exceed the water quality objective.
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. This conclusion is based on the staff findings that: 1. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 2. Twenty-four of 34 samples exceeded the Fecal Coliform water quality objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 3. 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: | 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. 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. |
|
|||||
LOE ID: | 2066 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 34 | ||||
Number of Exceedances: | 24 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Thirty-four bacteria samples, geomean of 934 exceeds standard, 24 samples exceeding at 400/100ml standard (SWRCB, 2003). | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Basin Plan: In waters designated for water contact recreation (REC-1), the fecal coliform concentration shall not exceed a log mean of 200/100 ml (based on a minimum of not less than four samples for any 30-day period), nor shall more than 10 percent of total samples during any 30-day period exceed 400/100 ml. | ||||
Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Three sites. | ||||
Temporal Representation: | Summer, fall, winter, spring. | ||||
Environmental Conditions: | |||||
QAPP Information: | Calleguas Creek Characterization Study. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
100562 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(2016) |
Revision Status | Original |
Sources: | Nonpoint Source | Point Source |
TMDL Name: | Calleguas Creek Nitrogen (1) |
TMDL Project Code: | 228 |
Date TMDL Approved by USEPA: | 06/20/2003 |
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 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Four lines of evidence are available in the administrative record to assess this pollutant. One placeholder decision for a CWA section 303(d) Listing made in a previous assessment cycle exceed the Guideline. Zero of five samples exceed the criteria. Zero of five samples exceed the criteria. Zero of five samples exceed the criteria. 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. 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. One placeholder decision, zero of five, zero of five, and zero of five samples exceeded the guideline and these exceed the allowable fequency listed in Table 4.1 of the Listing Policy. 4. The Calleguas Creek Nitrogen TMDL was approved by USEPA on 06/20/2003. 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 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. |
|
|||||
LOE ID: | 83274 | ||||
Pollutant: | Nitrogen, ammonia (Total Ammonia) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Ammonia as N, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Surface water shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic Life Ambient Water Quality Criteria for Ammonia – Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49. | ||||
Guideline Reference: | Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 2064 | ||||
Pollutant: | Ammonia | ||||
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: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 83264 | ||||
Pollutant: | Nitrogen, ammonia (Total Ammonia) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Ammonia as N, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Surface water shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Aquatic Life Ambient Water Quality Criteria for Ammonia – Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49. | ||||
Guideline Reference: | Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
69565 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Endosulfan |
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)(2016) |
Revision Status | Original |
Sources: | Agriculture-storm runoff |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 03/24/2006 |
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 4.1 of the Listing Policy. Under section 4.1 a single line of evidence are necessary to assess listing status.
4 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 0 samples exceeded the CRITERIA. 0 of the 5 samples exceeded the CRITERIA. 0 of the 5 samples exceeded the CRITERIA. 0 of the 0 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for removing this water segment-pollutant combination from 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. 0 of 0, 0 of 5, 0 of 5 and 0 of 0 samples exceeded the CRITERIA and 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 28 samples is needed to determine if a beneficial use is fully supported using table 4.1. 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. |
|
|||||
LOE ID: | 83266 | ||||
Pollutant: | Endosulfan | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endosulfan, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The endosulfan criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L. This value corresponds to the sum of alpha-endosulfan and beta-endosulfan (USEPA National Recommended Water Quality Criteria, 2006). | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 30123 | ||||
Pollutant: | Endosulfan (tissue) | ||||
LOE Subgroup: | Narrative Description Data | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | A TMDL has been approved for this water segment-pollutant combination. The Calleguas Creek OC Pesticides and PCBs TMDL was adopted by the Los Angeles RWQCB on July 07, 2005 and subsequently approved by USEPA on March 24, 2006. The TMDL was integrated into the Basin Plan as Attachment A of Regional Board Resolution No. 2006-010. | ||||
Data Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA information unavailable. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 83267 | ||||
Pollutant: | Endosulfan | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endosulfan, Total. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The endosulfan criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.056 ug/L. This value corresponds to the sum of alpha-endosulfan and beta-endosulfan (USEPA National Recommended Water Quality Criteria, 2006). | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 2073 | ||||
Pollutant: | Endosulfan | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
93612 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 2 samples exceeded the CRITERIA. 0 of 2 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 2 and 0 of 2 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83276 | ||||
Pollutant: | Azinphos-methyl (Guthion) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Azinphos Methyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/16/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83277 | ||||
Pollutant: | Azinphos-methyl (Guthion) | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Azinphos Methyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/16/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93887 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Chloride |
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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant. 4 of 5 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 4 of 5 samples exceeded the OBJECTIVE and 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 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. |
|
|||||
LOE ID: | 83322 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Four of the 5 samples exceeded the site specific objective. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Chloride site specific objective from table 3-8 of the Los Angeles Region Basin Plan is 150 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples collected at the 02D_BROOM station. | ||||
Temporal Representation: | Samples collected approximately twice a year in 2008 and 2009. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
100322 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
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. |
|
|||||
LOE ID: | 83361 | ||||
Pollutant: | DDD (Dichlorodiphenyldichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 5 of 5 samples exceed the criterion for DDD(p,p). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The DDD(p,p) criterion for the protection of human health from the fish consumption component of water contact recreation (REC-1) use is 0.00084 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
100095 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | DDE (Dichlorodiphenyldichloroethylene) |
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 listing on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under 3.1 of the Policy, a minimum of one line of evidence is needed to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. 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 from 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. 5 of 5 samples exceeded the CRITERIA and these exceed the allowable frequency listed in Table 3.1 of the Listing Policy. However, it was determined that this data came from a tributary to this water body and not the water body itself (see below). 4. The Calleguas Creek Historic Pesticides TMDL was approved by USEPA on 1/1/2005. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
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: | The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 96203 | ||||
Pollutant: | DDE (Dichlorodiphenyldichloroethylene) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 5 of 5 samples exceed the criterion for DDE(p,p). | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The DDE-4,4' criteria for the protection of human health from 30-day average fish consumption component of water contact recreation (REC-1) use is 0.00059 ug/L (California Toxics Rule, 2000). | ||||
Guideline Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93721 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Dacthal |
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 96219 | ||||
Pollutant: | Dacthal | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Dacthal. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that affect beneficial uses. | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | According to the USEPA Office of Pesticide Programs Ecotoxicity database, the aquatic life LC50 for Dacthal is 6600 ug/L. | ||||
Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83348 | ||||
Pollutant: | Dacthal | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Dacthal. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | According to the USEPA Office of Pesticide Programs Ecotoxicity database, the aquatic life LC50 for Dacthal is 6600 ug/L. | ||||
Guideline Reference: | OPP Pesticide Ecotoxicity Database. | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93777 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83203 | ||||
Pollutant: | Demeton | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Demeton. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater 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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83202 | ||||
Pollutant: | Demeton | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Demeton. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater 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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
76924 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 1 of 5 samples exceeded the CRITERIA. 1 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 1 of 5 and 1 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83253 | ||||
Pollutant: | Disulfoton | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 5 samples exceed the criterion for Disulfoton. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life instantaneous maximum for disulfoton is 0.05 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83265 | ||||
Pollutant: | Disulfoton | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 5 samples exceed the criterion for Disulfoton. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life instantaneous maximum for disulfoton is 0.05 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93722 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Endrin aldehyde |
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 are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83300 | ||||
Pollutant: | Endrin aldehyde | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Endrin Aldehyde. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The Endrin Aldehyde criteria for the protection of human health from the fish consumption component of water contact recreation (REC-1) use is 0.81 ug/L (California Toxics Rule, 2000). | ||||
Guideline Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
94044 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Heptachlor |
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83338 | ||||
Pollutant: | Heptachlor | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Heptachlor. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83327 | ||||
Pollutant: | Heptachlor | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Heptachlor. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
94103 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Heptachlor epoxide |
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83349 | ||||
Pollutant: | Heptachlor epoxide | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Heptachlor Epoxide. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Heptachlor Epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83339 | ||||
Pollutant: | Heptachlor epoxide | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Heptachlor Epoxide. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Heptachlor Epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.0038 ug/L (California Toxics Rule, 2000). | ||||
Objective/Criterion Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93343 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Methoxychlor |
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83179 | ||||
Pollutant: | Methoxychlor | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Methoxychlor. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life instantaneous maximum for methoxychlor is 0.03 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83178 | ||||
Pollutant: | Methoxychlor | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Methoxychlor. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The USEPA national ambient water quality criteria for freshwater aquatic life instantaneous maximum for methoxychlor is 0.03 µg/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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93453 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Mirex |
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83194 | ||||
Pollutant: | Mirex | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Mirex. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneifical uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The criterion continuous concentration for Mirex is 0.001 ug/l from the National Recommended Water Quality Criteria. | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83193 | ||||
Pollutant: | Mirex | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Mirex. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneifical uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The criterion continuous concentration for Mirex is 0.001 ug/l from the National Recommended Water Quality Criteria. | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93615 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 1 of 7 samples exceeded the OBJECTIVE. 1 of 7 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 1 of 7 and 1 of 7 samples exceeded the OBJECTIVE and 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 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. |
|
|||||
LOE ID: | 83205 | ||||
Pollutant: | Oxygen, Dissolved | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 7 samples exceed the criterion for Oxygen, dissolved. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges." | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83206 | ||||
Pollutant: | Oxygen, Dissolved | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 1 of 7 samples exceed the criterion for Oxygen, dissolved. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges." | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93503 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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 are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 5 samples exceeded the CRITERIA. 0 of 5 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 5 and 0 of 5 samples exceeded the CRITERIA and 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 fully supported using 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: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 83216 | ||||
Pollutant: | 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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Parathion, Ethyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The criterion continuous concentration for Parathion, Ethyl is 0.013 ug/l from the National Recommended Water Quality Criteria. | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/16/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83207 | ||||
Pollutant: | 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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Parathion, Ethyl. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
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 Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The criterion continuous concentration for Parathion, Ethyl is 0.013 ug/l from the National Recommended Water Quality Criteria. | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/16/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93834 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Sulfates |
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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant. 4 of 5 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 4 of 5 samples exceeded the OBJECTIVE and 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 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. |
|
|||||
LOE ID: | 83258 | ||||
Pollutant: | Sulfates | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 4 of 5 samples exceed the criterion for Sulfate. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Basin Plan recommended objective for Sulfate for agricultural supply beneficial use is 350-600 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93667 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
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)(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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
2 lines of evidence are available in the administrative record to assess this pollutant. 2 of 7 samples exceeded the OBJECTIVE. 0 of 7 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 2 of 7 and 0 of 7 samples exceeded the OBJECTIVE and 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 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. |
|
|||||
LOE ID: | 83268 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 2 of 7 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Basin Plan states that the natural receiving water temperature of all regional 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. Alterations for waters designated COLD shall not be altered by more than 5 degrees Fahrenheit above the natural temperature. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
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 Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83269 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 7 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | For waters designated WARM, water temperature shall not be altered by more than 5 deg. F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 deg. F as a result of waste discharges. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
94109 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Total Dissolved Solids |
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: | The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
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. |
|
|||||
LOE ID: | 83270 | ||||
Pollutant: | Total Dissolved Solids | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 5 of 5 samples exceed the criterion for Dissolved Solids. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Basin Plan recommended objective for TDS for agricultural supply beneficial use is 450-2000 mg/L. | ||||
Objective/Criterion Reference: | Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
100362 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | alpha.-BHC (Benzenehexachloride or alpha-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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
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. |
|
|||||
LOE ID: | 96177 | ||||
Pollutant: | alpha.-BHC (Benzenehexachloride or alpha-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for BHC, alpha. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The BHC, alpha criteria for the protection of human health from 30-day average fish consumption component of water contact recreation (REC-1) use is 0.013 ug/L (California Toxics Rule, 2000). | ||||
Guideline Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
100363 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | beta-BHC (Benzenehexachloride or beta-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)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | The decisions for Calleguas Creek Reach 2 have been revised to not use the data from the tributary monitoring site. The Los Angeles Water Board staff will work with the commenter, and other stakeholders, to purposely determine and document the appropriateness of assessing the tributary monitoring site under section 303(d) of the Clean Water Act. If it is determined that the tributary monitoring site is within a waterbody which should be addressed under section 303(d), then this determination requires that a new tributary be added to the CalQWA underlying map, which is maintained by State Board. It is the intention of the Los Angeles Water Board staff to work with State Board staff to resolve mapping issues prior to the State Board approval of the 2016 303(d) list, or prior to the next Listing Cycle that includes the Los Angeles Region. |
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. |
|
|||||
LOE ID: | 96190 | ||||
Pollutant: | beta-BHC (Benzenehexachloride or beta-HCH) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 5 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Ag waiver data for Boulder Creek (Ventura County) to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for BHC, beta. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | The BHC, beta criteria for the protection of human health from30-day average fish consumption component of water contact recreation (REC-1) use is 0.046 ug/L (California Toxics Rule, 2000). | ||||
Guideline Reference: | Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition | ||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 1/5/2008-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
93400 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | pH |
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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
4 line of evidence is available in the administrative record to assess this pollutant. 0 of 7 samples exceeded the OBJECTIVE. 0 of 7 samples exceeded the OBJECTIVE. 0 of 7 samples exceeded the OBJECTIVE. 0 of 7 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 7, 0 of 7, 0 of 7 and 0 of 7 samples exceeded the OBJECTIVE and 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 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. |
|
|||||
LOE ID: | 83231 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 7 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 7 samples exceed the criterion for pH. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83229 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 7 samples exceed the criterion for pH. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
|
|||||
LOE ID: | 83237 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
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: | State Water Board staff assessed Agwaiver data for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) to determine beneficial use support and results are as follows: 0 of 7 samples exceed the criterion for pH. | ||||
Data Reference: | Data for various Pollutants from the Ag Waiver Program, 2007-2009. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Calleguas Creek Reach 2 (estuary to Potrero Rd- was Calleguas Creek Reaches 1 and 2 on 1998 303d list) was collected at 1 monitoring site [ Discharge to Calleguas Creek at Broome Ranch Rd. - 02D_BROOM] | ||||
Temporal Representation: | Data was collected over the time period 9/11/2007-2/6/2009. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | Data quality is good. A QAPP and monitoring plan was submitted. Data was collected by the Ventura County Agricultural Irrigated Lands Group for Order No. R4- 2005-0080.) | ||||
QAPP Information Reference(s): | Quality Assurance Project Plan from Ventura County Agricultural Irrigated Lands Group. | ||||
DECISION ID |
70556 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Sedimentation/Siltation |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2005 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.
A TMDL and implementation plan has been approved for this water segment-pollutant combination. The Calleguas Creek Historic Pesticides TMDL was approved by the RWQCB in 2005. Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list. USEPA in its final decision for the 2006 303(d) list, has determined that a TMDL has not been approved by USEPA for this pollutant water body combination. Therefore, this water body pollutant combination is being placed back on the 303(d) list (TMDL required list) pending completion and USEPA approval of a TMDL. |
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. 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. |
|
|||||
LOE ID: | 2075 | ||||
Pollutant: | Sedimentation/Siltation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
77088 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
||
Pollutant: | Trash |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2021 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.7 of the Listing Policy. Under section 3.7 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. 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 11 samples exceeded the narrative objectives for trash listed in the Basin Plan, and evaluated using numeric targets derived in Los Angeles River Trash TMDL 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 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. 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. |
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LOE ID: | 30336 | ||||
Pollutant: | Trash | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Three of 11 samples exceeded the numeric target of zero trash. | ||||
Data Reference: | Calleguas Creek Watershed Monitoring Report prepared by Wishtoyo Foundation, Ventura Coastkeeper, 2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
Evaluation Guideline: | Narrative objective evaluated using numeric target of zero trash in Los Angeles River Trash TMDL and other regional trash TMDLs. | ||||
Guideline Reference: | |||||
Spatial Representation: | One monitoring station in Calleguas Creek, Reach 2 (CL1). | ||||
Temporal Representation: | 11 observations and trash counts were taken every month from February to December of 2006. | ||||
Environmental Conditions: | |||||
QAPP Information: | Data was collected in compliance with the sampling and monitoring procedures detailed in Wishtoyo Foundation Volunteer Monitoring Quality Assurance Project Plan. | ||||
QAPP Information Reference(s): | Wishtoyo Foundation Volunteer Monitoring Quality Assurance Project Plan | ||||
DECISION ID |
68806 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
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Pollutant: | ChemA |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Agriculture-storm runoff |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 03/24/2006 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. 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. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been completed and adopted by the Los Angeles RWQCB and approved by USEPA, and is expected to result in attainment of the standard. |
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. 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. |
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LOE ID: | 2071 | ||||
Pollutant: | ChemA (tissue) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 30122 | ||||
Pollutant: | ChemA (tissue) | ||||
LOE Subgroup: | Narrative Description Data | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | A TMDL has been approved for this water segment-pollutant combination. The Calleguas Creek OC Pesticides and PCBs TMDL was adopted by the Los Angeles RWQCB on July 07, 2005 and subsequently approved by USEPA on March 24, 2006. The TMDL was integrated into the Basin Plan as Attachment A of Regional Board Resolution No. 2006-010. | ||||
Data Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA information unavailable. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
68384 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
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Pollutant: | Copper |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Nonpoint Source |
TMDL Name: | Calleguas Creek Metals (6) |
TMDL Project Code: | 359 |
Date TMDL Approved by USEPA: | 03/23/2007 |
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 section 4.1 a single line of evidence is necessary to assess delisting status.
Two lines of evidence are available in the administrative record to assess this pollutant. Seven samples exceed the CTR dissolved copper continuous concentration in water for the protection of aquatic life. 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. This conclusion is based on the staff findings that: 1. It is unknown whether 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 11 samples exceeded the CTR dissolved copper continuous concentration. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met. The USEPA final decision on the 2006 303(d) list was to move this listing to the being addressed by a USEPA approved TMDL portion of the 303(d) list, because the Calleguas Creek Metals TMDL was approved by the RWQCB in June of 2006 and subsequently approved by USEPA in 2007 (USEPA, 2007). |
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. 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. |
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LOE ID: | 2068 | ||||
Pollutant: | Copper | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 11 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Eleven water samples, 7 samples exceeding for chronic standard (SWRCB, 2003). | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | CTR Copper Criterion for continuous concentration in water for the protection of aquatic life is expressed as a function of the total hardness of the water body. | ||||
Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Three sites. | ||||
Temporal Representation: | Summer, fall, winter of 1998 and 1999. | ||||
Environmental Conditions: | |||||
QAPP Information: | Calleguas Creek Characterization Study. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
69566 |
Region 4 |
Calleguas Creek Reach 2 (Estuary to Potrero Rd.) |
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Pollutant: | Toxicity |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Nonpoint Source | Point Source |
TMDL Name: | Calleguas Creek Historic Pesticides (5) |
TMDL Project Code: | 358 |
Date TMDL Approved by USEPA: | 01/01/2005 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.
The Calleguas Creek Historic Pesticides TMDL was approved by the RWQCB in 2005 and subsequently approved by USEPA. Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list. |
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. 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. |
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LOE ID: | 2074 | ||||
Pollutant: | Sediment Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Sediment | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||