Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name:	Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach - south
Water Body ID:	CAC9011300020090525213500
Water Body Type:	Coastal & Bay Shoreline


DECISION ID	16942

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

Weight of Evidence:	In 2006, 'Pacific Ocean Shoreline, Dana Point HSA' was listed for Indicator Bacteria. For 2008, the 2006 Dana Point HSA segment has been split into smaller segments and each represents an area near the sampling location of the data being assessed. 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations for Pacific Ocean Shoreline, Dana Point HSA and is considered to be part of the original listing. For this 2008 assessment, the Regional Board has chosen to replace the 'indicator bacteria' listing with separate assessments of the specific indicator bacteria, such as coliform, fecal coliform, and enterococcus, for removal or non-removal from the 303(d) list. Four lines of evidence are available in the administrative record to assess this pollutant. Forty-eight of samples exceeded the water quality objective for enterococcus. In LOE 29718 , the Regional Board calculated exceedances for samples taken only during storm events. This information was not used in determining listing decisions, but is of interest to the Regional Board and has been included as additional anecdotal information. 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. 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. Forty-eight of 959 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. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16942


LOE ID:	29716

Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	959
Number of Exceedances:	48

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 959. From the 959 samples, 48 exceeded the single sample maximum objective for enterococcus.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29718

Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	51
Number of Exceedances:	15

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples collected was 959. Betweem March 2002 and December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, 15 exceeded the water contact recreation single sample maximum for enterococcus. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 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. Bacteria monitoring 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 of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29717

Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	108
Number of Exceedances:	1

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 959 individual bacteria samples and 108 monthly geomeans were calculated. Of the 108 geomeans, only one exceeded the water contact objective for enterococcus.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	30186

Pollutant:	Indicator Bacteria
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Water Contact Recreation

Number of Samples:	0
Number of Exceedances:	0

Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Dana Point HSA' was split into smaller segments and each represents an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Dana Point HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split.
Data Reference:	Placeholder reference pre-2006 303(d)

Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)

Evaluation Guideline:
Guideline Reference:

Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information:	Unspecified
QAPP Information Reference(s):


LOE ID:	29731

Pollutant:	Indicator Bacteria
LOE Subgroup:	Health Advisories
Matrix:	-N/A
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	2555
Number of Exceedances:	144

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	For the period from January 2000 to December 2006, there were 144 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards. Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards.
Data Reference:	County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006.

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:

Spatial Representation:	Bacteriological monitoring samples were collected at Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Goff Island Beach, Treasure Island Beach, Aliso North, Aliso Middle, Aliso South, Camel Point, Table Rock, Laguna Lido, 9th Street/1000 Steps, and Three Arch Bay. The posting covers two miles of beach shoreline.
Temporal Representation:	The beach posting covers the time frame of January 2000 -December 2006.
Environmental Conditions:
QAPP Information:	Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document (County of Orange, 2004).
QAPP Information Reference(s):


DECISION ID	16941

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

Weight of Evidence:	In 2006, 'Pacific Ocean Shoreline, Dana Point HSA' was listed for Indicator Bacteria. For 2008, the 2006 Dana Point HSA segment has been split into smaller segments and each represents an area near the sampling location of the data being assessed. 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations for Pacific Ocean Shoreline, Dana Point HSA and is considered to be part of the original listing. For this 2008 assessment, the Regional Board has chosen to replace the 'indicator bacteria' listing with separate assessments of the specific indicator bacteria, such as coliform, fecal coliform, and enterococcus, for removal or non-removal from the 303(d) list. Four lines of evidence are available in the administrative record to assess this pollutant. Nine of the 975 samples exceed the water quality objective. In LOE 29715, the Regional Board calculated exceedances for samples taken only during storm events. This information was not used in determining listing decisions, but is of interest to the Regional Board and has been included as additional anecdotal information. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the section 303(d) list in the Water Quality Limited Segments category. 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. 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. Nine of the 975 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. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16941


LOE ID:	30186

Pollutant:	Indicator Bacteria
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Water Contact Recreation

Number of Samples:	0
Number of Exceedances:	0

Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Dana Point HSA' was split into smaller segments and each represents an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Dana Point HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split.
Data Reference:	Placeholder reference pre-2006 303(d)

Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)

Evaluation Guideline:
Guideline Reference:

Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information:	Unspecified
QAPP Information Reference(s):


LOE ID:	29731

Pollutant:	Indicator Bacteria
LOE Subgroup:	Health Advisories
Matrix:	-N/A
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	2555
Number of Exceedances:	144

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	For the period from January 2000 to December 2006, there were 144 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards. Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards.
Data Reference:	County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006.

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:

Spatial Representation:	Bacteriological monitoring samples were collected at Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Goff Island Beach, Treasure Island Beach, Aliso North, Aliso Middle, Aliso South, Camel Point, Table Rock, Laguna Lido, 9th Street/1000 Steps, and Three Arch Bay. The posting covers two miles of beach shoreline.
Temporal Representation:	The beach posting covers the time frame of January 2000 -December 2006.
Environmental Conditions:
QAPP Information:	Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document (County of Orange, 2004).
QAPP Information Reference(s):


LOE ID:	29715

Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	50
Number of Exceedances:	3

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 975. Between March 2002 and December 2007, 50 were correlated with storm events. From the 50 storm event samples, 3 exceeded the water contact recreation single sample maximum water quality objective for fecal coliform. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 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. Bacteria monitoring 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 of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29714

Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	108
Number of Exceedances:	0

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples collected was 975. From the 975 samples, 108 monthly geomeans were calculated with none exceeding the water contact recreation geomean water quality objective.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29713

Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	975
Number of Exceedances:	9

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 975 samples were collected. From the 975 samples, 9 exceeded the water contact recreation single sample maximum water quality objective for fecal coliform.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


DECISION ID	16940

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

Weight of Evidence:	In 2006, 'Pacific Ocean Shoreline, Dana Point HSA' was listed for Indicator Bacteria. For 2008, the 2006 Dana Point HSA segment has been split into smaller segments and each represents an area near the sampling location of the data being assessed. 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations for Pacific Ocean Shoreline, Dana Point HSA and is considered to be part of the original listing. For this 2008 assessment, the Regional Board has chosen to replace the 'indicator bacteria' listing with separate assessments of the specific indicator bacteria, such as coliform, fecal coliform, and enterococcus, for removal or non-removal from the 303(d) list. Six lines of evidence are available in the administrative record to assess this pollutant. Sixty-eight of 974 samples exceeded the water quality objective for Shellfish Harvesting. In LOEs 29709 and 29711, the Regional Board calculated exceedances for samples taken only during storm events. This information was not used in determining listing decisions, but is of interest to the Regional Board and has been included as additional anecdotal information.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. 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. Sixty-eight of 974 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. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

RWQCB Board Decision / Staff 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.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16940


LOE ID:	29709

Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Shellfish Harvesting

Number of Samples:	51
Number of Exceedances:	23

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The total number of samples was 974. From March 2002 through December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, 23 exceeded the single sample maximum objective for shellfish harvesting. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 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. Bacteria monitoring 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 of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29710

Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	974
Number of Exceedances:	2

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 974 individual bacteria samples. From the 974 samples, two samples exceeded single sample maximum water quality objective for water contact recreation.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29711

Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	51
Number of Exceedances:	1

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of samples 974 individual bacteria samples were collected. From March 2002 to December 2007, 51 samples were correlated with storm events. Of the 51 storm event samples, only one sample exceeded the water contact recreation single sample maximum water quality objective for total coliform. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 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. Bacteria monitoring 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 of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29712

Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	108
Number of Exceedances:	0

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples included 974 individual bacteria samples and 108 monthly geomeans were calculated. From the 108 geomeans, , none exceeded the water contact recreation geomean water quality objective for total coliform.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29708

Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Shellfish Harvesting

Number of Samples:	974
Number of Exceedances:	68

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Shoreline beach monitoring data was collected by the County of Orange from January 1999 through December 2007. The number of samples collected for total coliform analysis was 974. Of the 974 samples, 68 exceeded the single sample maximum total coliform standard for shellfish harvesting.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report.
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station

Water Quality Objective/Criterion:	From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 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 from the station Aliso Beach South, station id S8, in the Aliso Beach HSA. Lat/Long: 33.50755/-117.75087.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004.


LOE ID:	29731

Pollutant:	Indicator Bacteria
LOE Subgroup:	Health Advisories
Matrix:	-N/A
Fraction:	None

Beneficial Use:	Water Contact Recreation

Number of Samples:	2555
Number of Exceedances:	144

Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	For the period from January 2000 to December 2006, there were 144 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards. Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards.
Data Reference:	County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006.

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:

Spatial Representation:	Bacteriological monitoring samples were collected at Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Goff Island Beach, Treasure Island Beach, Aliso North, Aliso Middle, Aliso South, Camel Point, Table Rock, Laguna Lido, 9th Street/1000 Steps, and Three Arch Bay. The posting covers two miles of beach shoreline.
Temporal Representation:	The beach posting covers the time frame of January 2000 -December 2006.
Environmental Conditions:
QAPP Information:	Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document (County of Orange, 2004).
QAPP Information Reference(s):


LOE ID:	30186

Pollutant:	Indicator Bacteria
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded

Beneficial Use:	Water Contact Recreation

Number of Samples:	0
Number of Exceedances:	0

Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Dana Point HSA' was split into smaller segments and each represents an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Dana Point HSA, at Aliso Beach south' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Dana Point HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split.
Data Reference:	Placeholder reference pre-2006 303(d)

Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)

Evaluation Guideline:
Guideline Reference:

Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information:	Unspecified
QAPP Information Reference(s):