Final California 2010 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Santa Clara River Reach 3 (Freeman Diversion to A Street)
Water Body ID:	CAR4032100019990203101738
Water Body Type:	River & Stream


DECISION ID	5708	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

Pollutant:	Total Dissolved Solids
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)(2006)
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2015
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under section 4.2 a one line of evidence is necessary to assess delisting status. Four lines of evidence are available in the administrative record to assess this pollutant. A sufficient 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 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. 38 of 139 United Water Conservation District samples exceeded the TDS water quality objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 5. 13 of 51 County Sanitation District of Los Angeles County samples exceeded the TDS water quality objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 6. Two of 24 MS4 samples exceed the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties and this does not exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 7. Zero of one SWAMP sample exceed the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties and there are insufficient data to determine whether this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 8. 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.

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 5708, Total Dissolved Solids	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

2097

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Agricultural Supply

Number of Samples:

139

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One hundred and eighty-nine samples, 38 samples exceeding.

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Basin Plan: 1,300 mg/L.

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples representative of Reach.

Temporal Representation:

Quarterly sampling events.

Environmental Conditions:

QAPP Information:

POTW, United Water Conservation District, Department of Water
Resources.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 5708, Total Dissolved Solids	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

30241

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Agricultural Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

Zero of one sample exceeded the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties.

Data Reference:

Surface Water Ambient Monitoring Program data for all watersheds in the Los Angeles Region 2001-2005.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The Basin Plan lists specific water quality criterion of 1300 mg/L for total dissolved solids (TDS) for Santa Clara River Reach 3.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

One monitoring station: 403STC082

Temporal Representation:

Grab sample taken on 2/24/2003

Environmental Conditions:

QAPP Information:

Data collected for compliance with SWAMP.

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 5708, Total Dissolved Solids	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

30240

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Agricultural Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

Two of 24 samples exceeded the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties.

Data Reference:

Monitoring Reports, containing Data for Physical, Water Quality, Biological Constituents, for the Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan lists specific water quality criterion of 1300 mg/L for total dissolved solids (TDS) for Santa Clara River Reach 3.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Ventura County Watershed Protect District conducted receiving water monitoring at the mass emission station, ME-SCR located at the Freeman Diversion.

Temporal Representation:

Grab samples were taken during wet- and dry-weather events about six times a year from 2000 to 2006.

Environmental Conditions:

QAPP Information:

Data collected for compliance with MS4.

QAPP Information Reference(s):

Monitoring and reporting program No. CI 7388 for Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002

Line of Evidence (LOE) for Decision ID 5708, Total Dissolved Solids	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

7874

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Agricultural Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

13 of 51 samples exceed Basin Plan objectives. Semi-annual ambient water quality samples for TDS were taken in compliance with the Santa Paula Water Reclamation Facility NDPES permit monitoring requirements.

Data Reference:

NPDES receiving water monitoring reports for Santa Paula Water Reclamation Facility (NPDES No. CA0054224).

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan lists specific water quality criterion of 1300 mg/L for total dissolved solids (TDS) for Santa Clara River Reach 3.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The County Sanitation District of Los Angeles County conducted sampling at Santa Clara Reach 5 at the following monitoring stations : R1 located at Peck drain at Converse Road Bridge at the edge of the river bed about half a mile above the confluence with the low flow river stream; R2 located about 300 feet upstream from confluence with Peck drain; and R3 located approximately 300 feet downstream from the confluence with Peck Drain.

Three monitoring stations: River 1, River 2, River 3

Temporal Representation:

Grab samples were taken and analyzed on semi-annual basis from August 1999 to February 2007.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and monitoring procedures detailed in NPDES Permit No. CA0054224 Monitoring and Reporting Program.

QAPP Information Reference(s):

Santa Paul Wastewater Reclamation Facility Monitoring and Reporting Program for NDPES No. CA0054224

Santa Paul Wastewater Reclamation Facility Time Schedule Order for NDPES No. CA0054224


DECISION ID	10524	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

Pollutant:	Toxicity
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	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 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. One line(s) 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 22 samples exceed the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties 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:	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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 10524, Toxicity	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

21470

Pollutant:

Toxicity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Aquatic Life Use:

Fish Migration | Preservation of Rare & Endangered Species | Wildlife Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Three of 22 samples exceeded the water quality objective from the Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan states at there shall be no acute or chronic toxicity in ambient waters outside mixing zones.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Toxicity was defined as a reduction of the NOEC below 100% and was considered significant if the effect on the sample exposure was greater than 25%. Chronic toxicity is further expressed as toxic units (TUc), where TUc = 100/NOEC.
The No Observable Effect Concentration (NOEC) is expressed as the maximum percent of receiving water that causes no observable effect on a test organism, as determined by the result of a critical life stage toxicity test. The NOEC is defined, in USEPA, 2002 as the the lowest concentration of toxicant to which organisms are exposed in a life-cycle or partial life-cycle (short-term) test, which causes adverse effects on the test organisms (i.e., where the values for the observed responses are statistically significantly different from the controls).

Guideline Reference:

FINAL Calleguas Creek Watershed Toxicity, Chlorpyrifos and Diazinon TMDL Technical Report. 2005. Submitted to Los Angeles Regional Water Quality Control Board. Prepared by Larry Walker Associates on behalf of the Calleguas Creek Watershed Management Plan. June 21, 2005.

Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fourth Edition. EPA 600/4-90/27.

Spatial Representation:

Ventura County Watershed Protect District conducted receiving water monitoring at the mass emission station, ME-SCR located at the Freeman Diversion.

Temporal Representation:

Grab samples were taken during wet- and dry-weather events about six times a year from 2000 to 2006.

Environmental Conditions:

QAPP Information:

Data collected for compliance with MS4.

QAPP Information Reference(s):


DECISION ID	4210	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

Pollutant:	Ammonia
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)(2006)
Revision Status	Original
Sources:	Nonpoint Source \| Point Source
TMDL Name:	Santa Clara River Nitrogen (32)
TMDL Project Code:	227
Date TMDL Approved by USEPA:	03/18/2004
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. One line of evidence is available in the administrative record to assess this pollutant. Based on the applicable factor, a TMDL has been developed and approved by USEPA and an approved implementation plan is expected to result in attainment of the standard. The Santa Clara River Nitrogen TMDL was approved by RWQCB on August 7, 2003 and subsequently approved by USEPA on March 18, 2004. This water segment-pollutant combination was moved off the section 303(d) list during the 2002 listing cycle. 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 in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list.

Regional Board Decision Recommendation:	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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 4210, Ammonia	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

2096

Pollutant:

Ammonia

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 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	7142	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

Pollutant:	Chloride
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)(2006)
Revision Status	Original
Sources:	Nonpoint Source \| Point Source
TMDL Name:	Santa Clara River Chloride (31)
TMDL Project Code:	226
Date TMDL Approved by USEPA:	01/01/2002
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. One line of evidence is available in the administrative record to assess this pollutant. A TMDL has been developed and approved by USEPA and an approved implementation plan is expected to result in attainment of the standard. The Santa Clara River Reach 3 Chloride TMDL and implementation plan has been approved for this water segment-pollutant combination. The TMDL was approved by the RWQCB in 2002 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:	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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 7142, Chloride	Region 4
Santa Clara River Reach 3 (Freeman Diversion to A Street)

LOE ID:

2098

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Agricultural Supply

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 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):