Draft California 2020 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 2 - San Francisco Bay Region

Water Body Name:	Crown Beach (San Francisco Bay, Lower)
Water Body ID:	CAC2042004020161017060616
Water Body Type:	Coastal & Bay Shoreline


DECISION ID	98279	Region 2
Crown Beach (San Francisco Bay, Lower)

Pollutant:	Indicator Bacteria
Final Listing Decision:	Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Revised
Reason for Delisting:	Applicable WQS attained; due to change in WQS
Impairment from Pollutant or Pollution:	Pollution

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. All available enterococcus data (2007 through May 2017) were evaluated for this assessment. Fifty of the one thousand forty-seven samples exceeded the geometric mean objective. Consistent with the contact recreation water quality objective provided in the Inland Surface Waters Enclosed Bays and Estuaries Plan, only the geomean was used to determine use attainment because there were enough samples to calculate the geomean. This waterbody was originally listed based on exceedance of a total coliform objective from SF Bay Basin Plan. This total coliform objective no longer exists so we reassessed all available enterococcus data. 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Fifty of the one thousand forty-seven samples exceeded the geometric mean objective and this does not exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 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 be removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96980

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

101

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Sunset Road site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows:sixteen of the one hundred one STVs (calculated monthly) exceeded the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The statistical threshold value (STV) of 110 cfu/100 mL is not to be exceeded more than 10 percent of the time, calculated monthly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Sunset Road site.

Temporal Representation:

This LOE replaces #95849 which included data from 3/7/2006-8/30/2010.This new LOE also includes newer data collected from 2010 through May 3, 2017. These data were compared to the newly adopted enterococcus objectives to protect contact recreation. Data were collected throughout the calendar year.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96981

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

102

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The statistical threshold value (STV) of 110 cfu/100 mL is not to be exceeded more than 10 percent of the time, calculated monthly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Bird Sanctuary site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95873 which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010 - May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96975

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

197

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Sunset Road site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: one of the one hundred ninety-seven six-week rolling geometric means exceeded the objective. We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Sunset Road site.

Temporal Representation:

The data were collected throughout the year.This LOE replaces #95854, which included data collected from April 2007 to August 2010. This new LOE also includes data collected 2010-May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96973

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

221

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Bath House site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: seven of the two hundred twenty-one six-week rolling geometric means exceeded the objective.We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Bath House site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95860, which included data collected from September 2006 to August 2010. This new LOE also includes data from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96972

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

203

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach 2001 Shoreline Drive site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: six of the two hundred three six-week rolling geometric means exceeded the objective. We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach 2001 Shoreline Drive site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95870, which included data collected from September 2006 to August 2010. This new LOE also includes data from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96979

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

101

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Windsurfer Corner site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: ten of the one hundred one STVs (calculated monthly) exceeded the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The statistical threshold value (STV) of 110 cfu/100 mL is not to be exceeded more than 10 percent of the time, calculated monthly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Windsurfer Corner site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95861, which included collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96978

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

102

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Bath House site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: twenty-three of the one hundred two STVs (calculated monthly) exceeded the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The statistical threshold value (STV) of 110 cfu/100 mL is not to be exceeded more than 10 percent of the time, calculated monthly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Bath House site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95855, which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010 through May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96977

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

102

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach 2001 Shoreline Drive site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: twenty-six of the one hundred two STVs (calculated monthly) exceeded the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The statistical threshold value (STV) of 110 cfu/100 mL is not to be exceeded more than 10 percent of the time, calculated monthly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach 2001 Shoreline Drive site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95867, which included data collected over the time period 3/7/2006-8/30/2010. This new LOE also includes data collected from 2010-May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96976

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

198

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Windsurfer Corner site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: zero of the one hundred ninety-eight six-week rolling geometric means exceeded the objective. We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Windsurfer Corner site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95864, which included data collected from April 2007 to August 2010. This new LOE also includes data collected from 2010-May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98279, Indicator Bacteria	Region 2
Crown Beach (San Francisco Bay, Lower)

LOE ID:

96974

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

228

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Crown Beach - Bird Sanctuary site (San Francisco Bay, Lower) to determine beneficial use support and results are as follows: thirty-six of the two hundred twenty-eight six-week rolling geometric means exceeded the objective. We required a minimum of 5 samples to compute each valid geomean, consistent with the objective.

Data Reference:

Beach Watch Data for Six SF Bay Regional Water Quality Control Board Beaches for 2018 Listing Cycle

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The six-week rolling geometric mean of enterococci is not to exceed 30 cfu/100 mL, calculated weekly.

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at the Crown Beach Bird Sanctuary site.

Temporal Representation:

The data were collected throughout the year. This LOE replaces #95876, which included data collected from September 2006 to August 2010. This new LOE also includes data collected from 2010 to May 2017 and is based on an analysis of all available data in comparison to the newly adopted enterococcus objectives to protect contact recreation.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):