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

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name:	Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)
Water Body ID:	CAC9043100020090217093857
Water Body Type:	Coastal & Bay Shoreline


DECISION ID	16405	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

Pollutant:	Enterococcus
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 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. Two of the samples exceed the water quality objective for enterococcus. The coastal beach at this water segment is identified as an AB411 beach. To comply with the requirements of AB411 the dry weather data collected during the time frame of April 1st to October 31st is assessed using a four percent exceedance percentage, as described in section 3.3 and 4.3 of the Listing Policy. An assessment for dry weather single sample and the geometric mean calculation was conducted and two additional lines of evidence are available in the administrative record. Zero of 167 dry weather single samples and none of 25 geometric mean calculations exceeded the criteria for recreational use and this does not exceed the allowable limit based on the application of a four percent exceedance percentage (AB411) to section 3.3 of the Listing Policy. 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 184 samples exceeded the enterococcus water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Zero of 167 dry weather single samples exceeded the criteria for recreational use and this does not exceed the allowable limit based on the application of a four percent exceedance percentage (AB411) to section 3.3 of the Listing Policy 5. None of 25 geometric mean calculations exceeded the criteria for recreational use and this does not exceed the allowable limit based on the application of a four percent exceedance percentage (AB411) to section 3.3 of the Listing Policy. 6. 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 the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27207

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 184 single samples were collected with 44 monthly geomeans calculated. One of the 44 geomeans exceeded the geomean water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean: Enterococcus density shall not exceed 35 per 100 ml.

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EH-041.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27206

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 184 single samples were collected with 17 samples correlated with a storm event. Two of the 17 samples exceeded the single sample water quality objective.

Data Reference:

National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.

Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March.

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

31310

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from June 2004 through October 2007. A total of 103 dry month (April through October) single samples were collected with 25 dry month geomeans calculated. None of the 25 geomeans exceeded the geomean water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean: Enterococcus density shall not exceed 35 per 100 ml.

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from June 2004 through October 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

30574

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

167

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 184 single samples were collected of which 167 are dry weather (AB411) samples with zero samples exceeding the single sample water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27205

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

184

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 184 single samples were collected with two samples exceeding the single sample water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16405, Enterococcus	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

28056

Pollutant:

Indicator Bacteria

LOE Subgroup:

Health Advisories

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

2555

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

For the period from January 2001 to December 2007, there were no beach advisory days for this section of shoreline. Bacteriological samples are collected on a weekly basis at ocean and bay locations in San Diego County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that an advisory for waters have exceeded public health standards.

Data and information on the number of beach posting were summarized by the County of San Diego in their annual San Diego County Beach Closure and Advisory Reports. The reporting period was from January 2001 - December 2007. Data used was the number of days the beach was advisories were issued when the ocean or bay failed to meet the bacteriological standards.

Data Reference:

Department of Environmental Health, Land and Water Quality Division. San Diego County Beach Closure and Advisory Report

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Code of Regulations. Title 17, Section 7960.

(a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met.

Objective/Criterion Reference:

California Code of Regulations, Title 17, Section 7960

Evaluation Guideline:

Guideline Reference:

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

Spatial Representation:

Bacteriological monitoring samples were collected at Cerezo Drive on Oceanside City Beach, Oceanside, CA.

Temporal Representation:

The beach advisory covers the time frame of January January 2001 to December 2007.

Environmental Conditions:

QAPP Information:

Samples were collected in compliance with County of San Diego's Quality Assessment/Quality Control document

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006


DECISION ID	16403	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

Pollutant:	Fecal Coliform
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 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective for fecal coliform. This water body segment is identified as an AB411 beach and data collected during the time frame of April 1st to October 31st (dry weather) is assessed using a four percent exceedance percentage (section 3.3 of Listing Policy). There are two additional lines of evidence for dry weather single sample and geometric mean calculations. Zero of 168 samples exceeded the recreational use single sample criteria and 0 of 25 geo-metric mean calculations exceeded the geo-metric mean criteria. 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. None of 185 samples exceeded the fecal coliform water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Zero of 168 samples exceeded the fecal coliform recreational use water quality objective and this does not exceed the allowable limit listed in Table 3.2 (at a four percent exceedance percentage AB411) of the Listing Policy. 5. Zero of 25 geo-metric mean calculations exceeded the recreational use geo-metric mean criteria. This does not exceed the allowable limit in Table 3.2 (at a four percent exceedance percentage AB411). 6. 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 the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

31311

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from June 2004 through October 2007. A total of 104 dry month (April through October) single samples were collected with 25 dry month geomeans calculated. None of the 25 geomeans exceeded the geomean water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean; Fecal coliform density shall not exceed 200 per 100 ml;

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from June 2004 through October 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

28056

Pollutant:

Indicator Bacteria

LOE Subgroup:

Health Advisories

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

2555

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Data Reference:

Department of Environmental Health, Land and Water Quality Division. San Diego County Beach Closure and Advisory Report

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

California Code of Regulations, Title 17, Section 7960

Evaluation Guideline:

Guideline Reference:

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

Spatial Representation:

Bacteriological monitoring samples were collected at Cerezo Drive on Oceanside City Beach, Oceanside, CA.

Temporal Representation:

The beach advisory covers the time frame of January January 2001 to December 2007.

Environmental Conditions:

QAPP Information:

Samples were collected in compliance with County of San Diego's Quality Assessment/Quality Control document

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27203

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with 17 samples correlating with a storm event. None of the 17 samples exceeded the single sample water quality objective.

Data Reference:

National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum; Fecal coliform density shall not exceed 400 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27204

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected and 44 geomeans calculated. None of the 44 geomeans exceeded the geomean water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean; Fecal coliform density shall not exceed 200 per 100 ml;

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

30696

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

168

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected of which 168 are dry weather (AB411) samples with no sample exceeding the single sample water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum; Fecal coliform density shall not exceed 400 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16403, Fecal Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27202

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

185

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with no sample exceeding the single sample water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum; Fecal coliform density shall not exceed 400 per 100 ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006


DECISION ID	16402	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

Pollutant:	Total Coliform
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 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Two of the samples exceed the water quality objective for Shellfish Harvesting. The coastal beach at this water segment is identified as an AB411 beach. To comply with the requirements of AB411 the dry weather data collected during the time frame of April 1st to October 31st is assessed using a four percent exceedance percentage, as described in section 3.3 (and 4.3) of the Listing Policy. An assessment for dry weather single sample and the geometric mean calculation was conducted and two additional lines of evidence are available in the administrative record. None of 168 single samples and none of 25 geometric mean calculations exceeded the criteria for recreational use and this does not exceed the allowable limit based on the application of a four percent exceedance percentage (AB411) to section 3.3 of the Listing Policy. 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 185 samples exceeded the Shellfish Harvesting water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. None of 168 dry weather single samples exceeded the total coliform criteria for recreational use and this does not exceed the allowable limit (at a four percent exceedance percentage - AB411) in section 3.3 of the Listing Policy. 5. None of 25 dry weather geometric mean calculations exceeded the total coliform criteria for recreational use and this does not exceed the allowable limit (at a four percent exceedance percentage - AB411) in section 3.3 of the Listing Policy. 6. 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 the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

31312

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean: Total coliform density shall not exceed 1,000 per 100ml;

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from June 2004 through October 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27199

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

185

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with two samples exceeded the single sample water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

From the Ocean Plan the median coliform density shall not exceed 70 per 100ml, and not more than 10 percent of the samples shall exceed 230 per 100ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Station identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27200

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with 17 samples correlated with a storm event. Two of the 17 samples exceeded the single sample water quality objective.

Data Reference:

National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

From the Ocean Plan the median coliform density shall not exceed 70 per 100ml, and not more than 10 percent of the samples shall exceed 230 per 100ml (SWRCB, 2005).

Comparisons are also made for days with matching bacteria and storm event data. A storm event was defined as 0.2 inches of rainfall within a 72 hour period.

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cereza Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27193

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

185

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27198

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with 17 samples correlated with a storm event. None of the 17 samples exceeded the single sample water quality objective.

Data Reference:

National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Station identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

27201

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:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Beach monitoring data was collected by the County of San Diego from January 2004 through December 2007. A total of 185 single samples were collected with 44 monthly geomeans calculated. None of the 44 geomeans exceeded the geomean water quality objective.

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geomean: Total coliform density shall not exceed 1,000 per 100ml;

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

28056

Pollutant:

Indicator Bacteria

LOE Subgroup:

Health Advisories

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

2555

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Data Reference:

Department of Environmental Health, Land and Water Quality Division. San Diego County Beach Closure and Advisory Report

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

California Code of Regulations, Title 17, Section 7960

Evaluation Guideline:

Guideline Reference:

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

Spatial Representation:

Bacteriological monitoring samples were collected at Cerezo Drive on Oceanside City Beach, Oceanside, CA.

Temporal Representation:

The beach advisory covers the time frame of January January 2001 to December 2007.

Environmental Conditions:

QAPP Information:

Samples were collected in compliance with County of San Diego's Quality Assessment/Quality Control document

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006

Line of Evidence (LOE) for Decision ID 16402, Total Coliform	Region 9
Pacific Ocean Shoreline, Los Monos HSA, at South Carlsbad State Beach (near Cerezo Drive)

LOE ID:

30811

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

168

Number of Exceedances:

Data and Information Type:

PWS pathogen monitoring (ambient water)

Data Used to Assess Water Quality:

Data Reference:

Department of Environmental Health, Ocean & Bay Recreational Water Quality Program, 2007. AB 411 monitoring data 1999 to 2007

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml (SWRCB, 2005).

Objective/Criterion Reference:

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 at South Carlsbad State Beach (near Cerezo Drive), Carlsbad, California. Department of Environmental Health identification number is EN-050.

Temporal Representation:

Samples were collected from January 2004 through December 2007.

Environmental Conditions:

QAPP Information:

Quality control for the bacteria analysis portion was conducted in accordance with the County of San Diego, Department Public Health Laboratory Quality Assurance Manual.

QAPP Information Reference(s):

County of San Diego, 2006. Department Public Health Laboratory, Quality Assurance Manual, December 2006