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

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)
Water Body ID:	CAR4021001119990203085715
Water Body Type:	River & Stream


DECISION ID	13398	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

Pollutant:	Total Dissolved Solids
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 section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Two of the 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 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. Two of 92 samples exceeded the Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--of 1000 mg/L for TDS, and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 13398, Total Dissolved Solids	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

25739

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic 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:

Data collected for the Santa Barbara Channel Keeper Water Quality Monitoring Program (2001 to 2007). A total of two out of 64 exceeded the water quality objective of 1000 mg/L for TDS.

Data Reference:

Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--is 1000 mg/L for TDS.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

VR6 sampling site is located below the Ventura Countys Foster Park, slightly downstream of the Casitas Vista Drive bridge (Lat 34.422022, Long -119.263552).

Temporal Representation:

Grab samples taken and analyzed on monthly basis from August 2001 to January 2007.

Environmental Conditions:

QAPP Information:

Data collected and analyzed according to the provisions of the Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channel keeper, October 2004).

QAPP Information Reference(s):

Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004)

Line of Evidence (LOE) for Decision ID 13398, Total Dissolved Solids	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

25742

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic 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:

Data collected for the Ventura County Stormwater Monitoring Program (2000-2004), Permit No. CAS004002. A total of zero of 28 samples exceeded the water quality objective of 1000 mg/L for TDS.

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 Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--is 1000 mg/L for TDS.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

ME-VR sampling site is located at Casitas Vista Rd at Foster Park (Lat 34.35194, Long -119.30722, NAD 27).

Temporal Representation:

Grab samples taken from ME-VR and analyzed on wet-weather and dry-weather events from January 2000 to May 2004.

Environmental Conditions:

QAPP Information:

Data collected and analyzed according to the provisions of the Ventura County MS4 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.

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


DECISION ID	13171	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

Pollutant:	Indicator Bacteria
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 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary 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 in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Fourteen of 84 geometric mean calculations exceeded the Basin Plan Water Quality Objects for indicator bacteria in fresh water, and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are 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 13171, Indicator Bacteria	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

25707

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Other Agencies/Organizations provided monitoring data

Data Used to Assess Water Quality:

Data collected for the Santa Barbara Channelkeeper Water Quality Monitoring Program (2001 to 2007). A total of six out of 72 single samples and eight of 72 geometric means for E. coli exceeded the single sample and geometric mean criteria, respectively (Santa Barbara Channel Keeper, 2007).

Data Reference:

Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan bacteria objectives state that to protect water contact recreation in fresh waters individual samples shall not exceed the following limits: fecal coliform density shall not exceed 400/100 ml; and E. coli density shall not exceed 235/100 ml. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the fecal coliform density shall not exceed 200/100 ml; and the E. coli density shall not exceed 126/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

VR06 sampling site is located below the Ventura Countys Foster Park, slightly downstream of the Casitas Vista Drive bridge (Lat 34.351825, Long -119.307995).

Temporal Representation:

Grab samples taken and analyzed on monthly basis from January 2001 to February 2007.

Environmental Conditions:

QAPP Information:

Data collected and analyzed according to the provisions of the Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channel keeper, October 2004).

QAPP Information Reference(s):

Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004)

Line of Evidence (LOE) for Decision ID 13171, Indicator Bacteria	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

25708

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Other Agencies/Organizations provided monitoring data

Data Used to Assess Water Quality:

Data collected for the Ventura County Stormwater Monitoring Program (2002-2004), Permit No. CAS004002. A total of eight out of 16 single samples and six of 12 geometric means for E. coli exceeded the single sample and geometric mean criteria, respectively (Ventura County Stormwater Monitoring, 2002-2004).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

ME-VR sampling site is located at Casitas Vista Rd at Foster Park (Lat 34.35194, Long -119.30722, NAD 27).

Temporal Representation:

Grab samples taken from ME-VR and analyzed on wet-weather and dry-weather events from November 2002 to December 2004.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):


DECISION ID	7306	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

Pollutant:	Pumping
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)(2006)
Revision Status	Original
Sources:	Nonpoint Source
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	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:	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):	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 7306, Pumping	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

4261

Pollutant:

Pumping

LOE Subgroup:

Pollution

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:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	7307	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

Pollutant:	Water Diversion
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)(2006)
Revision Status	Original
Sources:	Nonpoint Source
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	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:	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):	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 7307, Water Diversion	Region 4
Ventura River Reach 3 (Weldon Canyon to Confl. w/ Coyote Cr)

LOE ID:

4262

Pollutant:

Water Diversion

LOE Subgroup:

Pollution

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:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):