Draft California 2016 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Arundell Barranca (Ventura County)
Water Body ID:	CAR4031100020110223094904
Water Body Type:	River & Stream


DECISION ID	64923	Region 4
Arundell Barranca (Ventura County)

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:	2027
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Staff Conclusion:	This pollutant is being considered for placement on the CWA 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. 7 line of evidence are available in the administrative record to assess this pollutant. 75 of 81 samples exceeded the OBJECTIVE. 56 of 56 samples exceeded the OBJECTIVE. 32 of 81 samples exceeded the OBJECTIVE. 47 of 56 samples exceeded the OBJECTIVE. 1 of 81 samples exceeded the OBJECTIVE. 56 of 56 samples exceeded the OBJECTIVE. 77 of 81 samples exceeded the OBJECTIVE. 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 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. 75 of 81, 56 of 56, 32 of 81, 47 of 56, 1 of 81, 56 of 56 and 77 of 81 samples exceeded the 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 Staff 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.

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82973

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Seventy-seven of the 811 samples exceeded the objective for total coliform.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The total coliform concentration shall not exceed 10000/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82959

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Thirty-two of the 81 samples exceeded the objective for fecal coliform.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fecal coliform concentration shall not exceed 400/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82958

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Fifty-six of the 56 samples exceeded the geomean objective for enterococcus.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geometric Mean: The enterococcus concentration shall not exceed 35/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82957

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Seventy-five of the 81 samples exceeded the objective for enterococcus.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The enterococcus concentration shall not exceed 104/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82960

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Forty-seven of the 56 samples exceeded the geomean objective for fecal coliform.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geometric Mean:The fecal coliform concentration shall not exceed 200/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca site K4. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82962

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

One of the 81 samples exceeded the objective for total coliform when the fecal coliform/total coliform ratio exceeds 0.1.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Total coliform density shall not exceed 1,000 per 100 ml when the fecal coliform/total coliform ratio exceeds 0.1. Basin Plan Region 4. California Ocean Plan 2009.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 64923, Indicator Bacteria	Region 4
Arundell Barranca (Ventura County)

LOE ID:

82961

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Fifty-six of the 56 samples exceeded the geomean objective for total coliform.

Data Reference:

Data for Bacteria Indicator from Peninsula Beach (Harbor Cove), Ventura Harbor, Ventura Keys, and Arundell Baranca, 2002-2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geometric Mean: The total coliform concentration shall not exceed 1000/100 ml. Basin Plan Region 4. ref1485 California Ocean Plan 2006.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Arundell Barranca. CAR4031100020110223094904

Temporal Representation:

Samples were collected approximately weekly from January 2003 to July 2005.

Environmental Conditions:

QAPP Information:

Laboratory QA document is provided. The samples were analyzed under the Quality Assurance Program for the City of Buenaventura Wastewater Laboratory.

QAPP Information Reference(s):