Final California 2018 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)
Water Body ID:	CAR5192100020021209150207
Water Body Type:	River & Stream


DECISION ID	92162	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

Pollutant:	Diazinon
Final Listing Decision:	Delist from 303(d) list (being addressed by action other than TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with action other than TMDL)(2016)
Revision Status	Revised
Reason for Delisting:	Applicable WQS attained; reason for recovery unspecified
Expected Attainment Date:	2026
Implementation Action Other than TMDL:	Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek) is primarily an urban drain. Site was listed in the Basin Plan Amendment for the Control of Diazinon and Chlorpyrifos Discharges Final Staff Report, 2014. Sampling indicated that it is no longer impaired due to a reduction of Diazinon in urban settings and updated management practices.
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Zero of the 28 samples exceeded the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient 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. Zero of the 28 samples exceeded the evaluation guideline and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 92162, Diazinon	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

132807

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four water column samples were collected by the Sacramento River Watershed Program from one sampling site in 2004. None of these samples exceeded the CDFW Hazard Assessment Criteria for Diazinon of 0.16 ug/L 1-hr. average.

Data Reference:

Sacramento River Watershed Program Annual Reports for 1999-2000, 2000-2001, 2001-2002, 2002-2003, and 2003-2004; and BDAT data 1998-2003

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. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

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:

CDFG Hazard Assessment Criteria 0.16 ug/L 1-hour average (Siepman & Finlayson, 2000; Finlayson, 2004).

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:

Samples were taken at Natomas East Main Drain.

Temporal Representation:

Samples were taken on 2/4/2004, 2/27/2004, 6/27/2004, and 8/7/2004.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plans prepared for Sacramento River Watershed Program

Line of Evidence (LOE) for Decision ID 92162, Diazinon	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

4492

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

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):

Line of Evidence (LOE) for Decision ID 92162, Diazinon	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

132805

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Twenty-four water column samples were taken from 1/10/2003 to 2/24/2003 from Natomas E. Main Drain at Discovery Park. Of these samples, none exceeded the CDFW Hazard Assessment Criteria for Diazinon of 0.16 ug/L 1-hr. average.

Data Reference:

Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports

SWAMP Data:

Water Quality Objective/Criterion:

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:

CDFG Hazard Assessment Criteria 0.16 ug/L 1-hour average (Siepman & Finlayson, 2000; Finlayson, 2004).

Guideline Reference:

Spatial Representation:

Samples were taken from Natomas E. Main Drain at Discovery Park

Temporal Representation:

Samples were taken daily from 1/10/2003 to 1/15/2003, 1/21/2003 to 1/26/2003, and 2/13/2003 to 2/24/2003.

Environmental Conditions:

QAPP Information:

The Quality Assurance Project Plan by the John Muir Institute of the Environment, UC California at Davis, January 2003-March 2003 was followed.

QAPP Information Reference(s):

Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports


DECISION ID	72907	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

Pollutant:	Mercury
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:	2027
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess pollutant. Eight of the eight samples exceed the evaluation guideline. LOE 22628 was not used in the final listing decision due to the criterion change. The data in LOE 22628 were reassessed in LOE 95513 with the new criterion. LOE 95513 was used in the final listing decision. Additionally, LOE 22629 was not used in the final listing decision due to the criterion change. The data in LOE 22629 were reassessed in LOE 95516 with the new criterion. LOE 95516 was used in the final listing decision. 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. 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. Eight of the eight samples exceed the evaluation guideline and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 72907, Mercury	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

22628

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Fish were sampled for tissue analysis at one location from this reach. A total of 4 out of 6 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.54 ppm for all 6 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Largemouth Bass- 3 composite samples, 0.60-0.68 ppm (average 0.64 ppm), 3 exceedances; Striped Bass- 1 sample, 0.81 ppm, 1 exceedance; White Catfish- 2 composite samples, 0.21 ppm, 0.29 ppm, no exceedances. All 6 composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families.

Data Reference:

Sacramento River Watershed Program Annual Reports for 1999-2000, 2000-2001, 2001-2002, 2002-2003, and 2003-2004; and BDAT data 1998-2003

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. The objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances.

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:

The USEPA Fish Tissue Residue Criterion for methylmercury in fish is 0.3 mg/kg (0.3 ppm) for the protection of human health. This is the concentration in fish tissue that should not be exceeded based on a total fish and shellfish consumption-weighted rate of 0.0175 kg fish/day. (USEPA, 2001)

Guideline Reference:

Water Quality Criterion for the Protection of Human Health: Methylmercury. Final. United States Environmental Protection Agency Office of Science and Technology Office of Water. EPA-823-R-01-001. January 2001

Spatial Representation:

Samples were collected at one location from this reach of Steelhead Creek just downstream of the El Camino Avenue bridge crossing.

Temporal Representation:

Fish samples were collected during three sampling events conducted during 1998, 1999 and 2000.

Environmental Conditions:

Significant gold mining activity occurred during the Gold Rush era within the Steelhead Creek watershed (USGS, 2005).

QAPP Information:

Data quality: Excellent.. Quality Control for all of the elements described in section 6.1.4 of the Policy was conducted in accordance with the Sacramento River Watershed Program QAPP prepared by Larry Walker Associates (LWA, 1998; LWA, 1999; LWA, 2000).

QAPP Information Reference(s):

Quality Assurance Project Plans prepared for Sacramento River Watershed Program

Line of Evidence (LOE) for Decision ID 72907, Mercury	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

95513

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Fish were sampled for tissue analysis at one location from this reach. A total of 6 out of 6 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.54 ppm for all 6 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species:

Largemouth Bass- 3 composite samples, 0.60-0.68 ppm (average 0.64 ppm), 3 exceedances;
Striped Bass- 1 sample, 0.81 ppm, 1 exceedance;
White Catfish- 2 composite samples, 0.21 ppm, 0.29 ppm, 2 exceedances.

All 6 composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families.

Data Reference:

Sacramento River Watershed Program Annual Reports for 1999-2000, 2000-2001, 2001-2002, 2002-2003, and 2003-2004; and BDAT data 1998-2003

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

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:

The U.S. EPA 304(a)-recommended water quality criterion for concentrations of methylmercury in fish tissue of trophic level 4 fish (150 - 500 mm; fillet wet weight) is 0.20 mg/Kg.

Guideline Reference:

Spatial Representation:

Samples were collected at one location from this reach of Steelhead Creek just downstream of the El Camino Avenue bridge crossing.

Temporal Representation:

Fish samples were collected during three sampling events conducted during 1998, 1999 and 2000.

Environmental Conditions:

Significant gold mining activity occurred during the Gold Rush era within the Steelhead Creek watershed (USGS, 2005).

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plans prepared for Sacramento River Watershed Program

Line of Evidence (LOE) for Decision ID 72907, Mercury	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

22629

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Fish were sampled for tissue analysis at one location from this reach. A total of 0 out of 2 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.23 ppm for the 2 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species: Carp- one 3-fish composite sample, 0.20 ppm, no exceedances; Sacramento Sucker- one 3-fish composite sample, 0.26 ppm, no exceedances. Both composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families.

Data Reference:

Toxic Substances Monitoring Program: Freshwater Bioaccumulation Monitoring: TSM Program Data 1978-2000. State Water Resources Control Board, Division of Water Quality

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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 at one location from this reach of Steelhead Creek just downstream of the El Camino Ave. bridge crossing.

Temporal Representation:

Fish samples were collected during one sampling event on 5/15/1985.

Environmental Conditions:

Significant gold mining activity occurred during the Gold Rush era within the Steelhead Creek watershed (USGS, 2005).

QAPP Information:

Data quality: Excellent.. Quality Control for the fish sampling, tissue preparation, mercury analysis, and QA sample analysis portions of this study was conducted as described in the Toxic Substance Monitoring Report for 1985 (Rasmussen et al., 1987).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 72907, Mercury	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

95516

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Fish were sampled for tissue analysis at one location from this reach. A total of 2 out of 2 samples exceeded the USEPA fish tissue criterion for human health. The average wet weight mercury concentration in fish tissue was 0.23 ppm for the 2 samples collected. The number of fish collected per sample, the measured mercury concentrations in fish tissue, and the number of exceedances are, by species:

Carp- one 3-fish composite sample, 0.20 ppm, 1 exceedance;
Sacramento Sucker- one 3-fish composite sample, 0.26 ppm, 1 exceedance.

Both composite samples were collected from fish with average total lengths greater than 150 mm, which represent fish most commonly caught and consumed by sport fishers and their families.

Data Reference:

Toxic Substances Monitoring Program: Freshwater Bioaccumulation Monitoring: TSM Program Data 1978-2000. State Water Resources Control Board, Division of Water Quality

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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:

The U.S. EPA 304(a)-recommended water quality criterion for concentrations of methylmercury in fish tissue of trophic level 4 fish (150 - 500 mm; fillet wet weight) is 0.20 mg/Kg.

Guideline Reference:

Spatial Representation:

Samples were collected at one location from this reach of Steelhead Creek just downstream of the El Camino Ave. bridge crossing.

Temporal Representation:

Fish samples were collected during one sampling event on 5/15/1985.

Environmental Conditions:

Significant gold mining activity occurred during the Gold Rush era within the Steelhead Creek watershed (USGS, 2005).

QAPP Information:

QAPP Information Reference(s):


DECISION ID	70493	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

Pollutant:	PCBs (Polychlorinated biphenyls)
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:	2020
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data or information was available during the 2014 Integrated Report cycle to reassess this water body segment and pollutant. The decision has not changed. 303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.

Regional Board Decision Recommendation:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data or information was available during the 2014 Integrated Report cycle to reassess this water body segment and pollutant. The decision has not changed. This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 70493, PCBs (Polychlorinated biphenyls)	Region 5
Natomas East Main Drainage Canal (aka Steelhead Creek, downstream of confluence with Arcade Creek)

LOE ID:

4493

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

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:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):