Final California 2024 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 1 - North Coast Region

Water Body Name:	Campbell Cove
Water Body ID:	CAC1152100020070319132228
Water Body Type:	Coastal & Bay Shoreline


DECISION ID	77438	Region 1
Campbell Cove

Pollutant:	Indicator Bacteria
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)(2016)
Revision Status	Revised
Sources:	A Source Unknown
Expected TMDL Completion Date:	2022
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Fecal indicator bacteria (which includes enterococcus, fecal coliform) are being considered for removal from the 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. Six lines of evidence are available in the administrative record to assess indicator bacteria in this water body for the attainment of water contract recreation (REC-1) standards. Additionally, one LOE is available for total coliform for the attainment of shellfish harvesting (SHELL) standards. Data from LOE 343 were re-evaluated with LOE 133865. Data from LOE 8831 were re-evaluated with LOEs 133703 and 133704. Data from LOE 32677 were re-evaluated with LOE 133703. Data from LOE 44728 were re-evaluated with LOE 133704. LOEs 133703 and 133704 will not be included in the final use rating because the same data are evaluated at 10% by LOEs 133623 and 133593. In the 2006 and 2010 Integrated Reports, the data results for single sample maximum and geometric mean calculations were presented in the same LOE. In the 2012 Integrated Report, the data results for single sample maximum and geometric mean calculations are presented in two separate LOEs. Additionally, in the 2006 Integrated Report enterococcus data was evaluated in the same LOE as fecal coliform data and in 2018 the statistical threshold value is being used to with the geomean to evaluate data. The following summary presents the total number of exceedances and total sample count from the three listing cycles combined, for single sample maximum separate from geometric mean: 1) 52 of 134 samples exceed the Statistical Threshold Value objective for the REC-1 for enterococcus; 2) 107 of 421 samples exceed the geometric mean objective for the REC-1 beneficial use for enterococcus; 3) 48 of 310 samples exceed the singles sample maximum objective for REC-1 for fecal coliform; 4) 57 of 196 samples exceed the geometric mean objective for REC-1 for fecal coliform. For the protection of the shellfish harvesting beneficial use 146 of 520 samples exceeded the median concentration objective for total coliform, which is more than the allowable exceedance frequency in Section 4.3 of the Listing Policy. The data assessed in this decision are ocean beach bacteria data collected in accordance with AB411 (Chapter 765, Statutes of 1997) requirements. In accordance with Section 4.3 of the Listing Policy, a 4% exceedance rate shall be used to remove waters to the List "if water quality monitoring was conducted April 1 through October 31 only". However, the data assessed in this decision include data collected during months outside the April - October range. Therefore, the samples are being compared against a 10% exceedance rate. The enterococcus samples (single samples, statistical threshold value, and geomean values) violate the allowable exceedance rate. The fecal coliform samples (both single samples and geomean) violate the allowable exceedance rate. The total coliform samples, (median concentration for SHELL only) violate the allowable exceedance rate. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against 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) Enterococcus single sample and geometric mean values, as well as the Fecal Coliform single sample and geometric mean values, exceed the objective for the protection of REC-1 more than the allowable frequency identified in Section 4.2 of the Listing Policy. (4) The total coliform samples related to the protection of shellfish harvesting, exceeded the objective more than the allowable frequency identified in Section 4.2. (5) Pursuant to Section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are me

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:	The data assessed in this decision are ocean beach bacteria data collected in accordance with AB411 (Chapter 765, Statutes of 1997) requirements. In accordance with Section 4.3 of the Listing Policy, a 4% exceedance rate shall be used to remove waters to the List "if water quality monitoring was conducted April 1 through October 31 only". However, the data assessed in this decision include data collected during months outside the April - October range. Therefore, the samples are being compared against a 10% exceedance rate. The enterococcus samples (single samples, statistical threshold value, and geomean values) violate the allowable exceedance rate. The fecal coliform samples (both single samples and geomean) violate the allowable exceedance rate. The total coliform samples, (median concentration for SHELL only) violate the allowable exceedance rate. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against 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) Enterococcus single sample and geometric mean values, as well as the Fecal Coliform single sample and geometric mean values, exceed the objective for the protection of REC-1 more than the allowable frequency identified in Section 4.2 of the Listing Policy. (4) The total coliform samples related to the protection of shellfish harvesting, exceeded the objective more than the allowable frequency identified in Section 4.2. (5) Pursuant to Section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are me

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133624

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

520

Number of Exceedances:

146

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beachwatch_Sonoma County data for Campbell Cove to determine beneficial use support and the results are as follows: 146 of the 520 samples exceeded the water quality standard for Coliform, Total. The water quality standard for shellfish is based on the median concentration of Total Coliform at each station, and is calculated on a monthly basis.

Data Reference:

Sonoma County Beachwatch data reformatted to match CEDEN fields.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2018) states that the median concentration of total coliform samples shall not exceed 70 per 100 ml.

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): Campbell Cove

Temporal Representation:

The samples were collected between the days of 1999-08-10 and 2017-05-01 .

Environmental Conditions:

QAPP Information:

Data exempt from QAPP requirement. Draft QAPP for Sonoma County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP.

QAPP Information Reference(s):

Draft QAPP for Sonoma County Beachwatch. Represents data collection procedure prior to development of a formal QAPP.

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

8832

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Sixteen of the 79 single samples of fecal coliform collected at Campbell Cove State Beach exceed the objective. Additionally, 5 of the 17 30-day geomean values exceed the objective. The single sample and geomean values are two different matrices used to analyzed the same data. Samples were collected by the Sonoma County Division of Environmental Health in accordance with AB411 (Chapter 765, Statutes of 1997) requirements. Data is maintained by the State Water Board's Beach Watch program. Data is summarized by the North Coast Regional Water Board (NCRWQCB 2007).

Data Reference:

North Coast Beach Watch Data. Bacteria data collected by Del Norte County, Humboldt County, Mendocino County Environmental Health Division, Sonoma County Division of Environmental Health, and Marin County in accordance with AB411. Data managed by the State Water Resources Control Board's Beach Watch program at beachwatch.waterboards.ca.gov. Includes data from 2004 to 2006

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Ocean Plan (SWRCB 2005): The following bacterial objectives shall be maintained throughout the water column. The following standard is based on the 30-day geometric mean of the five most recent samples from each site: Fecal coliform density shall not exceed 200 MPN per 100 ml. The following standard is for the single sample maximum: Fecal coliform density shall not exceed 400 per 100ml. *Note: MPN is the most probable number of coliform units.

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 Campbell Cove State Beach.

Temporal Representation:

Samples were collected weekly from April through October 2005 to 2006.

Environmental Conditions:

Samples were collected during the dry season. Otherwise, there are no known environmental conditions (e.g., land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Samples were collected in accordance with the procedures described in "Environmental Health Policy and Procedure No. 00-1" (Krug 2000).

QAPP Information Reference(s):

Environmental Health Policy and Procedure No. 00-1. Subject: Ocean Water Sampling Program Procedures. County of Sonoma Department of Health Services

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

44591

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

128

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

12 of 128 samples exceed the single sample maximum objective for Fecal Coliform.

Data Reference:

Data for Region 1 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for contact recreation (REC-1), the median fecal coliform concentration based on a minimum of not less than five samples for any 30-day period shall not exceed 50/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400/100 ml.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Campbell Cove was collected at 1 monitoring site [ Campbell Cove State Beach]

Temporal Representation:

Data was collected over the time period 4/2/2007-2/16/2010.

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 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133865

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

182

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

There were 36 out of 182 samples that exceeded the single sample maximum for fecal coliform.

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Water Quality Objective/Criterion:

California Ocean Plan (2015) states that single sample maximum shall not exceed 400 fecal coliform bacteria per 100 milliliters;

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Station ID# SON60

Temporal Representation:

4/02/2001-10/24/2005

Environmental Conditions:

QAPP Information:

2001-2005, Sonoma County Health Dept.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

32679

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

117

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

41 of the 117 geomeans exceeded the objective.

Data Reference:

Data for Region 1 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Campbell Cove.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133623

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

421

Number of Exceedances:

107

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beachwatch_Sonoma County data for Campbell Cove to determine beneficial use support and the results are as follows: 107 of the 421 samples exceeded the geomean water quality standard for Enterococcus. This is a six week rolling geomean that is calculated weekly.

Data Reference:

Sonoma County Beachwatch data reformatted to match CEDEN fields.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective to protect the REC-1 beneficial for all ocean waters , is a six-week rolling GM of Enterococci not to exceed 30 cfu/100mL (calculated weekly).

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): Campbell Cove

Temporal Representation:

The samples were collected between the days of 1999-08-10 and 2017-05-01 .

Environmental Conditions:

QAPP Information:

Data exempt from QAPP requirement. Draft QAPP for Sonoma County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP.

QAPP Information Reference(s):

Draft QAPP for Sonoma County Beachwatch. Represents data collection procedure prior to development of a formal QAPP.

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

343

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

152

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Available data indicate sufficient exceedances of bacterial indicator objectives. There were 36 out of 182 samples that exceeded the single sample maximum for fecal coliform, 58 out of 182 exceeded the single sample maximum for enterococci, and 69 out of 152 exceeded the geomean for enterococci (USEPA, 2007).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Title 17 C.C.R. Section 7958 states: Based on a single sample, the density of bacteria in water from each sampling station at a public beach or public water contact sports area shall not exceed:
(A) 1,000 total coliform bacteria per 100 milliliters, if the ratio of fecal/total coliform bacteria exceeds 0.1; or
(B) 10,000 total coliform bacteria per 100 milliliters; or
(C) 400 fecal coliform bacteria per 100 milliliters; or
(D) 104 enterococcus bacteria per 100 milliliters.

Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of bacteria in water from any sampling station at a public beach or public water contact sports area, shall not exceed:
(A) 1,000 total coliform bacteria per 100 milliliters; or
(B) 200 fecal coliform bacteria per 100 milliliters; or
(C) 35 enterococcus bacteria per 100 milliliters. (DHS, 1999)

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Station ID# SON60

Temporal Representation:

4/02/2001-10/24/2005

Environmental Conditions:

QAPP Information:

2001-2005, Sonoma County Health Dept.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133703

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

372

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beachwatch_Sonoma County data for Campbell Cove to determine beneficial use support and the results are as follows: 82 of the 372 samples exceeded the geomean water quality standard for Enterococcus. This is a six week rolling geomean that is calculated weekly. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year.

Data Reference:

Sonoma County Beachwatch data reformatted to match CEDEN fields.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective to protect the REC-1 beneficial for all ocean waters , is a six-week rolling GM of Enterococci not to exceed 30 cfu/100mL (calculated weekly).

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): Campbell Cove

Temporal Representation:

The samples were collected between the days of 1999-08-10 and 2017-05-01 .

Environmental Conditions:

QAPP Information:

Data exempt from QAPP requirement. Draft QAPP for Sonoma County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP.

QAPP Information Reference(s):

Draft QAPP for Sonoma County Beachwatch. Represents data collection procedure prior to development of a formal QAPP.

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

44728

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

128

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

28 of 128 samples exceed the criterion for Enterococci.

Data Reference:

Data for Region 1 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The recommended single sample criteria for entercoccus states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL. 1986 U.S.EPA criteria for recreation beaches.

Objective/Criterion Reference:

Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Campbell Cove was collected at 1 monitoring site [ Campbell Cove State Beach]

Temporal Representation:

Data was collected over the time period 4/2/2007-2/16/2010.

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 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

32677

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

117

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Thirty-nine of the 117 geomeans exceeded the objective.

Data Reference:

Data for Region 1 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The recommended geometric mean criteria for entercoccus states that the entercoccus density shall not exceed 35 per 100 mL 1986 U.S.EPA criteria for recreation beaches.

Objective/Criterion Reference:

Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Campbell Cove.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133704

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

111

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beachwatch_Sonoma County data for Campbell Cove to determine beneficial use support and the results are as follows: 43 of the 111 samples exceeded the Statistical Threshold Value (STV) water quality standard for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. This data is for an AB411 beach. This LOE specifically corresponds with dry weather samples and only includes samples collected between April 1 and October 31 of each year.

Data Reference:

Sonoma County Beachwatch data reformatted to match CEDEN fields.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective to protect the REC-1 beneficial for all ocean waters, is a Statistical Threshold Value (STV) of 110 cfu/100 mL not to be exceeded more than 10 percent of the time (calculated monthly).

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): Campbell Cove

Temporal Representation:

The samples were collected between the days of 1999-08-10 and 2017-05-01 .

Environmental Conditions:

QAPP Information:

Data exempt from QAPP requirement. Draft QAPP for Sonoma County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP.

QAPP Information Reference(s):

Draft QAPP for Sonoma County Beachwatch. Represents data collection procedure prior to development of a formal QAPP.

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

8831

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Twenty three of the 79 single samples of enterococcus collected at Campbell Cove State Beach exceed the objective. Additionally, 10 of the 17 30-day geomean values exceed the objective. The single sample and geomean values are two different matrices used to analyzed the same data. Samples were collected by the Sonoma County Division of Environmental Health in accordance with AB411 (Chapter 765, Statutes of 1997) requirements. Data is maintained by the State Water Board's Beach Watch program. Data is summarized by the North Coast Regional Water Board (NCRWQCB 2007).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Ocean Plan (SWRCB 2005): The following bacterial objectives shall be maintained throughout the water column. The following standard is based on the 30-day geometric mean of the five most recent samples from each site: Enterococcus density shall not exceed 35 MPN per 100ml. The following standard is for the single sample maximum: Enterococcus density shall not exceed 104 per 100 ml. *Note: MPN is the most probable number of coliform units.

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 Campbell Cove State Beach.

Temporal Representation:

Samples were collected weekly from April through October 2005 to 2006.

Environmental Conditions:

Samples were collected during the dry season. Otherwise, there are no known environmental conditions (e.g., land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Samples were collected in accordance with the procedures described in "Environmental Health Policy and Procedure No. 00-1" (Krug 2000).

QAPP Information Reference(s):

Environmental Health Policy and Procedure No. 00-1. Subject: Ocean Water Sampling Program Procedures. County of Sonoma Department of Health Services

Line of Evidence (LOE) for Decision ID 77438, Indicator Bacteria	Region 1
Campbell Cove

LOE ID:

133593

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

134

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Beachwatch_Sonoma County data for Campbell Cove to determine beneficial use support and the results are as follows: 52 of the 134 samples exceeded the Statistical Threshold Value (STV) water quality standard for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Sonoma County Beachwatch data reformatted to match CEDEN fields.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): Campbell Cove

Temporal Representation:

The samples were collected between the days of 1999-08-10 and 2017-05-01 .

Environmental Conditions:

QAPP Information:

Data exempt from QAPP requirement. Draft QAPP for Sonoma County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP.

QAPP Information Reference(s):

Draft QAPP for Sonoma County Beachwatch. Represents data collection procedure prior to development of a formal QAPP.