Final California 2012 Integrated Report( 303(d) List/305(b) Report)

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)
Water Body ID:	CAR4034100020050918185447
Water Body Type:	River & Stream


DECISION ID	18941	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

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)(2010)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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. One line of evidence is available in the administrative record to assess this pollutant. An insufficient number of samples exceed the exceed the Inland Surface Waters Site Specific Water Quality Objectives of 60 mg/l for Chloride on table 3.8 of the Basin Plan. Based on the readily available data and information, the weight of evidence indicates that there is insufficient 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.Three of nine samples exceeded the Site Specific Water Quality Objective. More data is needed to determine if the water quality standard is exceeded. 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:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.

State Board Staff Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 18941, Chloride	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

LOE ID:

2109

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Nine samples with three samples exceeding. Surface water data presented within the report "Water Quality in the Calleguas Creek and Santa Clara River Watersheds Under the Surface Water Ambient Monitoring Program Fiscal Year 2000-2001" as prepared by the Marine Pollution Studies Laboratory Moss Landing Marine Laboratories for the Laos Angeles Regional Water Quality Control Board (SWAMP, 2004).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Objectives for Selected Constituents in Inland Surface Waters shown in Table 3-8 of the Basin Plan (60 mg/l).

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Nine sampling stations.

Temporal Representation:

Samples were collected in February through June 2003.

Environmental Conditions:

Santa Clara River Segment 11. Piru Creek above gauging station below Santa Felicia Dam.

QAPP Information:

SWAMP Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	19151	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

Pollutant:	Boron
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)(2010)
Revision Status	Original
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. This pollutant is being considered for placement on the 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. One line of evidence is available in the administrative record to assess this pollutant. A sufficient number of samples exceed the Inland Surface Waters Site Specific Water Quality Objectives of 1.0 mg/L for boron on Table 3.8 of the Basin Plan. 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. Three of 3 samples exceeded the Site Specific Water Quality 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:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.

State Board Staff Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 19151, Boron	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

LOE ID:

2108

Pollutant:

Boron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Agricultural Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Three water samples; three samples exceeding the objective (SWAMP, 2004).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Objectives for Selected Constituents in Inland Surface Waters shown in the Basin Plan on Table 3-8 (1.0 mg/L).

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Three sampling stations.

Temporal Representation:

Samples were collected in February through June 2003.

Environmental Conditions:

Santa Clara River Segment 11. Piru Creek above gauging station below Santa Felicia Dam.

QAPP Information:

SWAMP Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	22335	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

Pollutant:	Specific Conductance
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)(2010)
Revision Status	Original
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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. 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. 12 of 13 samples exceeded the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations 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:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 Staff Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 22335, Specific Conductance	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

LOE ID:

8757

Pollutant:

Specific Conductance

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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:

12 of 13 samples exceeded the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations for specific conductance. Water quality samples were taken for specific conductance in accordance with regional SWAMP Monitoring parameters.

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 Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations is 700 umhos/cm for Specific Conductance.

Objective/Criterion Reference:

Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The Los Angeles Regional Board sampled and measured specific conductance at Santa Clara River Reach 11 at the following ten monitoring stations :
403STC009 (Lat. 34.53338) (Long. -118.75854),
403STC017 (Lat. 34.68799) (Long. -118.902479),
403STC021 (Lat. 34.64754) (Long. -119.06954),
403STC025 (Lat. 34.66521) (Long. -119.0517),
403STC069 (Lat. 34.68243) (Long. -119.0223),
403STC071 (Lat. 34.68281) (Long. -118.843),
403STC076 (Lat. 34.42366) (Long. -118.76392),
403STC083 (Lat. 34.62801) (Long. -118.7455),
403STC085 (Lat. 34.642) (Long. -119.0723), and
403STC093 (Lat. 34.708611) (Long. -118.975).

Temporal Representation:

Grab samples were taken from 11/15/2001 to 06/23/2003.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.

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)


DECISION ID	18935	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

Pollutant:	Sulfates
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)(2010)
Revision Status	Original
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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. One line of evidence is available in the administrative record to assess this pollutant. A sufficient number of samples exceed the exceed the Inland Surface Waters Site Specific Water Quality Objectives of 400 mg/l for Sulfate on table 3.8 of the Basin Plan. 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. Six of 13 samples exceeded the Site Specific Water Quality Objective 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 not met.

Regional Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.

State Board Staff Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 18935, Sulfates	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

LOE ID:

2110

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Agricultural Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Thirteen samples with 6 samples exceeding (SWAMP, 2004).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Objectives for Selected Constituents in Inland Surface Waters shown in Table 3-8 of the Basin Plan (400 mg/l).

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Nine sampling stations.

Temporal Representation:

Samples were collected in February through June 2003.

Environmental Conditions:

Santa Clara River Segment 11. Piru Creek above gauging station below Santa Felicia Dam.

QAPP Information:

SWAMP Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	21812	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

Pollutant:	Total Dissolved Solids
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)(2010)
Revision Status	Original
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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. 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. Eight of 13 samples exceeded the Basin Plan reach specific water quality criterion for total dissolved solids 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:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 Staff Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Region 4 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. 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 21812, Total Dissolved Solids	Region 4
Santa Clara River Reach 11 (Piru Creek, from confluence with Santa Clara River Reach 4 to gaging station below Santa Felicia Dam)

LOE ID:

8756

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:

Eight of 13 samples exceeded the Basin Plan objectives for TDS. Water quality samples were taken for TDS in accordance with regional SWAMP Monitoring parameters.

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 a specific water quality objectives for Santa Clara River Reach 11 of 800 mg/L for total dissolved solids (TDS).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region Basin Plan 1997-2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Grab samples were taken from 11/15/2001 to 06/23/2003.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.

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)