Draft California 2026 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Village West Marina (in Delta Waterways, eastern portion)
Water Body ID:	CAE5440000020110406223035
Water Body Type:	Estuary


DECISION ID	156829	Region 5
Village West Marina (in Delta Waterways, eastern portion)

Pollutant:	Copper
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This decision was updated during the Delta Remapping Project, where data was reassociated to a Delta Waterbody from the Delta Subarea. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 156829, Copper	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

321597

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the hardness adjusted CTR value for dissolved copper in freshwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a hardness of 100 mg/L was used.

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:

A total of four separate grab samples were collected from inside the Village West marina basin (Sites 1, 2, 3, & 4) these sites were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

QAPP Information:

Samples were collected and analyzed in accordance with a Quality Assurance Project Plan that was prepared per State Water Resources Control Board Agreement No. 05-218-250 California Department of Pesticide Regulation, Sacramento, CA. (Available online at http://www.cdpr.ca.gov/docs/emon/surfwtr/protocols/qapp_study236.pdf)

QAPP Information Reference(s):

This is a placeholder for previously assessed data that does not have quality assurance information but would require it under newly developed policies. These LOEs were previously assessed and approved at the Regional, State and Federal level in past cycles. The LOEs needed to be moved and/or reassessed but required this reference code for movement within the decision making database.

Line of Evidence (LOE) for Decision ID 156829, Copper	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

321598

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the hardness adjusted CTR value for dissolved copper in freshwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

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:

A total of four separate grab samples were collected from outside the Village West marina basin (Sites 5, 6, 7, & 8), these sites were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):


DECISION ID	156830	Region 5
Village West Marina (in Delta Waterways, eastern portion)

Pollutant:	Oxygen, Dissolved
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This decision was developed as part of the Sacramento-San Joaquin Delta remapping project. Data has been reassessed and decisions revised due to their spatial representation. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 156830, Oxygen, Dissolved	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

321612

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of three daily minimum water sample measurements do not meet the DO water quality objective of 5.0 mg/L.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Within the legal boundaries of the Delta, the dissolved oxygen concentration shall not be reduced below: 7.0 mg/l in the Sacramento River (below the I Street Bridge) and in all Delta waters west of the Antioch Bridge; 6.0 mg/l in the San Joaquin River (between Turner Cut and Stockton, 1 September through 30 November); and 5.0 mg/l in all other Delta waters except for those bodies of water which are constructed for special purposes and from which fish have been excluded or where the fishery is not important as a beneficial use. The objective of 5.0 mg/l applies to Fourteenmile Slough in the eastern Delta.Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the following stations on the southeastern portion of Fourteenmile Slough in the eastern Delta: Village West Marina 5.1 Village West Marina 5.2 Village West Marina 5.3 Village West Marina 6.1 Village West Marina 6.2 Village West Marina 6.3 Village West Marina 7.1 Village West Marina 7.2 Village West Marina 7.3 Village West Marina 8.2 Village West Marina 8.3. Village West Marina denotes the study region, the first number denotes the station number, and the second number denotes the sampling event number. The four sampling stations are close enough to be considered the same location per section 6.1.5.2 of the Listing Policy. Further, the California Department of Pesticide Regulation (DPR) report that describes the monitoring design states, The four samples taken inside each marina and the four samples taken for each LRS area during each sampling event represented sub-samples for that particular marina and LRS area. (DPR, 2009, page 15) This provides additional justification for considering the four Fourteenmile Slough stations to be considered the same location. As a result, staff assessed the Fourteenmile Slough data collected during each sampling event as one location.

Temporal Representation:

Samples were collected once a month from July 2006 to September 2006 from the southeastern portion of Fourteenmile Slough in [Delta Waterways (eastern portion)].

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 156830, Oxygen, Dissolved	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

72098

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of three daily minimum water sample measurements do not meet the DO water quality objective of 5.0 mg/L.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Within the legal boundaries of the Delta, the dissolved oxygen concentration shall not be reduced below:
7.0 mg/l in the Sacramento River (below the I Street Bridge) and in all Delta waters west of the Antioch Bridge; 6.0 mg/l in the San Joaquin River (between Turner Cut and Stockton, 1 September through 30 November); and 5.0 mg/l in all other Delta waters except for those bodies of water which are constructed for special purposes and from which fish have been excluded or where the fishery is not important as a beneficial use. The objective of 5.0 mg/l applies to Fourteenmile Slough and the Village West Marina in the eastern Delta.
Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the following stations: Village West Marina 1.1 Village West Marina 1.2 Village West Marina 1.3 Village West Marina 2.1 Village West Marina 2.2 Village West Marina 2.3 Village West Marina 3.1 Village West Marina 3.2 Village West Marina 3.3 Village West Marina 4.1 Village West Marina 4.2 Village West Marina 4.3. "Village West Marina" denotes the study region, the first number denotes the station number, and the second number denotes the sampling event number.
The four sampling stations are close enough to be considered the same location per section 6.1.5.2 of the Listing Policy. Further, the California Department of Pesticide Regulation (DPR) report that describes the monitoring design states, ¿The four samples taken inside each marina and the four samples taken for each LRS area during each sampling event represented sub-samples for that particular marina and LRS area.¿ (DPR, 2009, page 15) This provides additional justification for considering the four Village West Marina stations to be considered the same location. As a result, staff assessed the Village West Marina data collected during each sampling event as one location.

Temporal Representation:

Samples were collected once a month from July 2006 to September 2006 at Village West Marina (part of Delta Waterways (eastern portion)).

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):


DECISION ID	156832	Region 5
Village West Marina (in Delta Waterways, eastern portion)

Pollutant:	Zinc
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 decision was updated during the Delta Remapping Project, where data was reassociated to a Delta Waterbody from the Delta Subarea. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 156832, Zinc	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

321616

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the hardness adjusted CTR value for dissolved zinc in freshwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

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:

A total of four separate grab samples were collected from outside the Village West marina basin (Sites 5, 6, 7, & 8), these sites were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 156832, Zinc	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

72113

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the hardness adjusted CTR value for dissolved zinc in freshwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

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:

A total of four separate grab samples were collected from inside the Village West marina basin (Sites 1, 2, 3, & 4) these sites were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

Samples were collected during the dry season only.

QAPP Information:

QAPP Information Reference(s):


DECISION ID	156831	Region 5
Village West Marina (in Delta Waterways, eastern portion)

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)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This decision was developed as part of the Sacramento-San Joaquin Delta remapping project. Data has been reassessed and decisions revised due to their spatial representation. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 156831, pH	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

321618

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Numeric data generated from 11 minimums and maximums had no exceedences.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pH shall not be depressed below 6.5 nor raised above 8.5.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the following stations: Village West Marina 5.1 Village West Marina 5.2 Village West Marina 5.3 Village West Marina 6.1 Village West Marina 6.2 Village West Marina 6.3 Village West Marina 7.1 Village West Marina 7.2 Village West Marina 7.3 Village West Marina 8.2 Village West Marina 8.3

Temporal Representation:

Samples were collected once a month from July 2006 to September 2006.

Environmental Conditions:

QAPP Information:

NPDES quality assurance.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 156831, pH	Region 5
Village West Marina (in Delta Waterways, eastern portion)

LOE ID:

72099

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the 6 samples exceeded the objective.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pH shall not be depressed below 6.5 nor raised above 8.5.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected once a month from July 2006 to September 2006.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):