Final California 2018 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 1 - North Coast Region

Water Body Name:	Russian River HU, Lower Russian River HA, Guerneville HSA
Water Body ID:	CAR1141104119990614110247
Water Body Type:	River & Stream


DECISION ID	74259	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	Aluminum
Final Listing Decision:	Do Not 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
Sources:	A Source Unknown
Expected TMDL Completion Date:	2025
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Eighteen lines of evidence are available in the administrative record to assess pollutant. Twenty-two of 120 samples exceed the objective for the protection of the MUN beneficial use. 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. Twenty-two of 120 samples exceed the objective for the protection of the MUN beneficial use and this exceeds the allowable frequency listed in Table 4.1 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 met.

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

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104539

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2899)

Temporal Representation:

The samples were collected between the dates of 2011-06-01 and 2011-10-24

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104535

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1644)

Temporal Representation:

The samples were collected between the dates of 2011-12-01 and 2011-12-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

120871

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed NWIS data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the USGS National Water Information System

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:

The samples were collected at 1 monitoring site(s) (USGS-11467002)

Temporal Representation:

The samples were collected between the dates of 2010-10-14 and 2010-10-14

Environmental Conditions:

QAPP Information:

QAPP not required for federal data

QAPP Information Reference(s):

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104528

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114AU0318)

Temporal Representation:

The samples were collected between the dates of 2010-09-30 and 2011-12-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104531

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1159)

Temporal Representation:

The samples were collected between the dates of 2011-12-01 and 2011-12-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46956

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eleven of the 28 aluminum samples collected from the mainstem Russian River exceed the objective. Sample concentrations range from 32.80 to 2,547.00 ug/L. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). This LOE replaces LOE 25386 from the 2010 Integrated Report. The number of samples has been updated to reflect the correct number of samples (28 samples instead of 27) and the data are re-assessed against an updated evaluation guideline.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at 6 locations as follows: (1) at Odd Fellows Crossing (SWAMP Station ID 114RRODDF), (2) at Johnson's Beach (SWAMP Station ID 114RRJB01), (3) at Vacation Beach (SWAMP Station ID 114RRVACB), and (4) at Wohler Dam (SWAMP Station ID 114RRWOH). Samples were collected from well-mixed flows in glides or riffles.

Temporal Representation:

At the Odd Fellows, Vacation Beach, and Wohler Dam sites, samples were collected over 2 site visits at each site during June 2001. At the Johnson's Beach site, samples were collected over 22 site visits from June 2001 to June 2006. These site visits corresponded to fall, winter, spring and early summer seasonal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104533

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1325)

Temporal Representation:

The samples were collected between the dates of 2010-12-01 and 2011-12-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104534

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1599)

Temporal Representation:

The samples were collected between the dates of 2011-06-02 and 2011-09-07

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104532

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1310)

Temporal Representation:

The samples were collected between the dates of 2011-06-02 and 2011-06-02

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

117625

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR2940_SWAMP)

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2011-11-29

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104529

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR0898)

Temporal Representation:

The samples were collected between the dates of 2011-08-03 and 2011-12-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104538

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR2769)

Temporal Representation:

The samples were collected between the dates of 2011-06-01 and 2011-06-01

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

25386

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the 27 aluminum samples collected from the mainstem Russian River exceed the objective. Sample concentrations range from 32.80 to 2,547.00 ug/L. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The Maximum Contaminant Level for aluminum is 1.0 mg/l (1,000 ug/L).

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

41378

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 2 of 4 samples exceed the criterion for Aluminum.

Data Reference:

RWB1 Trend Maintenance Periods FYs 2007 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Russian River HU, Lower Russian River HA, Guerneville HSA was collected at 1 monitoring site [ Russian River at Johnson's Beach - 114RR1325]

Temporal Representation:

Data was collected over the time period 11/26/2007-7/14/2008.

Environmental Conditions:

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

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104530

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1041)

Temporal Representation:

The samples were collected between the dates of 2011-08-02 and 2011-10-10

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

41359

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Aluminum.

Data Reference:

RWB1 Trend Maintenance Periods FYs 2007 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Russian River HU, Lower Russian River HA, Guerneville HSA was collected at 1 monitoring site [ Russian River at Healdsburg Memorial Beach - 114RR2940]

Temporal Representation:

Data was collected over the time period 11/26/2007-7/14/2008.

Environmental Conditions:

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

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46517

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Six of the 22 aluminum samples collected from the mainstem Russian River exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). This LOE and LOE 46516 contain data originally evaluated in LOE 25385, which included data from a site that is not in this water body. The data from LOE 25385 have been split into two LOEs, with data now evaluated under the correct water body. Additonally, the data in this LOE have been re-evaluated against an updated evaluation guideline.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at Healdsburg Memorial Beach (SWAMP Station ID 114RRHMB1). Samples were collected from well-mixed flows in glides or riffles.

Temporal Representation:

At the Healdsburg Memorial Beach site samples were collected over 22 site visits from June 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 74259, Aluminum	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104536

Pollutant:

Aluminum

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Aluminum.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR2678)

Temporal Representation:

The samples were collected between the dates of 2011-06-29 and 2011-11-29

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	79794	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

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:	See TMDL documentation
Expected TMDL Completion Date:	2020
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	New bacteria water quality objectives for inland surface waters, enclosed bays, and estuaries in California took effect on February 4, 2019. Therefore, the Brooks Creek-Russian River HUC-12, Porter Creek-Russian River HUC-12, Dutch Bill Creek-Russian River HUC-12, and Willow Creek-Russian River HUC-12 are being considered for placement on the CWA section 303(d) List under section 3.11 of the Listing Policy utilizing the new objectives. Under this section a single line of evidence is necessary to assess listing status. Twenty-two lines of evidence are available in the administrative record to assess this pollutant. Forty-seven additional E.coli LOEs and thirty-seven enterococcus LOEs are associated with this decision but were not utilized to make impairment determinations as these data were either deemed unsuitable or were re-evaluated and are summarized in the other LOEs associated with this decision. Eight LOEs for Fecal Coliform are associated with this decision but were not used to make impairment determinations as the new state-wide objective for indicator bacteria in freshwater and saline water does not include fecal coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing the Brooks Creek-Russian River HUC-12, Porter Creek-Russian River HUC-12, Dutch Bill Creek-Russian River HUC-12, and Willow Creek-Russian River HUC-12 on the CWA section 303(d) List for Indicator Bacteria. 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. The impairment analysis utilized a 10% exceedance frequency for year-round and winter data analysis (November – March) and a 4% exceedance frequency was utilized during the summer months (April – October). 4. BROOKS CREEK-RUSSIAN RIVER HUC-12: Six of 10 E. coli STVs calculated from November-March “winter/wet” data exceed the objective, and this exceeds the allowable frequency from Table 3.2 of the Listing Policy. 5. DUTCH BILL CREEK-RUSSIAN RIVER HUC-12: Eleven of 24 E. coli STVs calculated from November-March “winter/wet” data exceed the objective, and this exceeds the allowable frequency from Table 3.2 the Listing Policy. 6. PORTER CREEK-RUSSIAN RIVER HUC-12: Eight of 10 E. coli STVs calculated from November-March “winter/wet” data exceed the objective, and this exceeds the allowable frequency from Table 3.2 the Listing Policy. 7. WILLOW CREEK-RUSSIAN RIVER HUC-12: Twelve of 29 Enterococci STVs calculated from saline November-October “year-round” data and 11 of 27 Enterococci STVs calculated from saline April-October “summer/dry” data exceed the objective and this exceeds the allowable frequency from the Listing Policy. 8. The weight of evidence reflects that these data indicate the Brooks Creek-Russian River HUC-12, Porter Creek-Russian River HUC-12, and Dutch Bill Creek-Russian River HUC-12 are impaired because the REC-1 beneficial use is not attained due to the risk of illness associated with E.coli. 9. The weight of evidence reflects that these data indicate the Willow Creek-Russian River HUC-12 is impaired because the REC-1 beneficial use is not attained due to the risk of illness associated with enterococcus.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the Brooks Creek-Russian River HUC-12, Porter Creek-Russian River HUC-12, Dutch Bill Creek-Russian River HUC-12, and Willow Creek-Russian River HUC-12 should be placed on the section 303(d) list for Indicator Bacteria because applicable water quality standards for the pollutant are being exceeded.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31852

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty samples collected at Russian River at Forestville Access Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

The data was collected by the Sonoma County Water Agency (SCWA) and analyzed by the Sonoma County Public Health Laboratory. SCWA follows the same protocol as the North Coast Water Quality Control Board.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31860

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-nine samples collected at Russian River at Monte Rio Beach exceeded the E.coli objective.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31926

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River Camp Rose.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34365

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Healdsburg Memorial Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31929

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for e. coli. The samples were collected at Russian River at Johnson's Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31983

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seventeen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Camp Rose.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34383

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-nine samples collected at Healdsburg Memorial Beach exceeded the e. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7077

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 1 E. coli samples from the Russian River at Laurel Dell Road exceeds the evaluation guideline. The sample concentration is 20 MPN / 100 ml. The sample was collected by the Community Clean Water Institute (CCWI 2006).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Per the "Draft Guidance for Fresh Water Beaches" (DHS 2006): Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. *Note: MPN is the most probable number of coliform units.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The sample was collected from the mainstem Russian River from a private beach in a trailer park on Laurel Dell Road, which is located off Highway 116 between Monte Rio and Cazadero.

Temporal Representation:

The sample was collected on July 20, 2005.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The sample was collected in accordance the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6139

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 1 E. coli sample from the Fife Creek exceed the evaluation guideline. The sample concentration is 993 MPN / 100 ml. The sample was collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003).

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from 1 site at Fife Creek where it intersects with Highway 116.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6148

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 1 E. coli sample from the Hobson Creek exceed the evaluation guideline. The sample concentration is 2,500 MPN / 100 ml. The sample was collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003).

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from 1 site in Hobson Creek where it intersects with Skyline Road near McPeak Road. Hobson Creek empties into the Russian River near Hacienda.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7079

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four of the 19 E. coli samples from the Russian River at Odd Fellows Bridge exceed the evaluation guideline. Concentrations range from 10 to 4,160 MPN / 100 ml. The samples were collected by the Community Clean Water Institute (CCWI 2006; CCWI 2007).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

Community Clean Water Institute Master Data for 2006. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River, just downstream of the Odd Fellows Bridge.

Temporal Representation:

The samples were generally collected monthly in 2005 and 2006.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7078

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four of the 20 E. coli samples from the Russian River at Johnson's Beach exceed the evaluation guideline. Concentrations range from less than 10 to 4,569 MPN / 100 ml. The samples were collected by the Community Clean Water Institute (CCWI 2006; CCWI 2007).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

Community Clean Water Institute Master Data for 2006. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Johnson's Beach in Guerneville.

Temporal Representation:

The samples were generally collected monthly in 2005 and 2006.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7119

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 13 E. coli samples from the Russian River at Vacation Beach exceed the evaluation guideline. Sample concentrations range from 5.2 to 85.5 MPN / 100 ml. Samples were collected by the Sonoma County Water Agency. Data are summarized in the "Russian River Pathogen Data Report" of the Russian River Pathogen Project Database (ICE 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Vacation Beach.

Temporal Representation:

Samples were collected once every several days from May 17 to June 28, 2007.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The quality assurance information for these data is unknown.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46612

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 13 E. coli samples from the Russian River at Healdsburg Memorial Beach exceed the evaluation guideline. Samples concentrations range from 8.6 to 31.3 MPN / 100 ml. Samples were collected by the Sonoma County Water Agency. Data are summarized in the "Russian River Pathogen Data Report" of the Russian River Pathogen Project Database (ICE 2008). This LOE is an exact duplicate of LOE 7110 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 7110 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Healdsburg Memorial Beach.

Temporal Representation:

Samples were collected once every several days from May 17 to June 28, 2007

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The quality assurance information for these data is unknown.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46611

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 83 E. coli samples from the Russian River at Healdsburg Memorial Beach exceed the evaluation guideline. Sample concentrations ranged from 0 to 111 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2002 - 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008). This LOE is an exact duplicate of LOE 5941 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 5941 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

Summer 2008 Russian River Bacteria Data. Downloaded July 23, 2008 from https://www.waterboards.ca.gov/northcoast/water_issues/programs/water_quality_sampling/russian_river.shtml. North Coast Regional Water Quality Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Healdsburg Memorial Beach near Healdsburg, in front of lifeguard stand 3 at the downstream end of the swim area. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

The samples were generally collected once a week during the summer months from Memorial Day to Labor Day in 2002-2003 and 2005-2007. Samples for 2008 were collected from May to July. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches. Prepared by Cathy Goodwin, NCRWQCB - July 21, 1999, July 29, 1999, May 2005, and May 22, 2007. North Coast Regional Water Quality Control Board

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7115

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 13 E. coli samples from the Russian River at Monte Rio Beach exceed the evaluation guideline. Samples concentrations range from 7.4 to 133.3 MPN / 100 ml. Samples were collected by the Sonoma County Water Agency. Data are summarized in the "Russian River Pathogen Data Report" of the Russian River Pathogen Project Database (ICE 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Monte Rio Beach.

Temporal Representation:

Samples were collected once every several days from May 17 to June 28, 2007.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The quality assurance information for these data is unknown.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

5945

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

228

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 228 E. coli samples from the Russian River at Steelhead Beach, Forestville Access Beach, Odd Fellows Bridge and Johnson's Beach exceeds the evaluation guideline. At Steelhead Beach, 75 samples were collected with concentrations ranging from 0 to 132 MPN / 100 ml. At Forestville Access Beach, 18 samples were collected with concentrations ranging from less than 10 to 62 MPN / 100 ml. At Odd Fellows Bridge, 52 samples were collected with concentrations ranging from 10 to 42 MPN / 100 ml. At Johnson's Beach, 83 samples were collected with concentrations ranging from less than 10 to 1,091 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2002 - 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Steelhead Beach (near Forestville), Forestville Access Beach (near Hacienda), Odd Fellows Bridge (near Korbel), and Johnson's Beach (in Guerneville). The Odd Fellows Bridge sampling site is accessed via Odd Fellows Park Road and the samples are collected by wading from the small sandy beach upstream of the summer bridge. The Johnson's Beach sampling site is located downstream of the children's swim area and upstream of the bridge. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

For all the samples collected between 1997 and 2007, samples were generally collected once a week during the summer months between Memorial Day and Labor Day. For all of the samples collected in 2008, samples were collected once a week from May 27 to July 15, 2008. The samples were often collected on the same day of the week and at the same time of day. For Steelhead Beach and Johnson¿s Beach, the samples were collected in 2002-2003 and 2005-2008. For Forestville Access Beach, the samples were collected in 2007-2008. For Odd Fellows Bridge, the samples were collected from 2002-2003 and 2005.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7112

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 13 E. coli samples from the Russian River at Johnson's Beach exceed the evaluation guideline. Samples concentrations range from 9.8 to 122.3 MPN / 100 ml. Samples were collected by the Sonoma County Water Agency. Data are summarized in the "Russian River Pathogen Data Report" of the Russian River Pathogen Project Database (ICE 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Johnson's Beach.

Temporal Representation:

Samples were collected once every several days from May 17 to June 28, 2007.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The quality assurance information for these data is unknown.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46610

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 10 E. coli samples from the Russian River at Healdsburg Memorial Beach exceed the evaluation guideline. Sample concentrations range from 8 to 62 MPN / 100 ml. Samples were collected by Regional Water Board staff as part of a targeted sampling event on the Russian River around Fitch Mountain. Data are summarized by Goodwin (1997). This LOE is an exact duplicate of LOE 6119 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 6119 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

Staff Report Regarding Russian River Bacterial Water Quality Monitoring in the Vicinity of Fitch Mountain Sonoma County, California. April through September, 1995. North Coast Regional Water Quality Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at 4 sites along Healdsburg Memorial Beach: at the upstream end of the beach immediately downstream of the automobile bridge, in the area designated for young children to swim, at the downstream end of the swim area, and from the gravel bar at the fisherman¿s beach which is immediately downstream of the dam. Samples were collected in well mixed flowing water, either in midstream or near the shore. Data from samples collected on the same day at more than one of these sites were averaged.

Temporal Representation:

Samples were collected weekly on May 9 and July 5, 1995.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Samples were collected in accordance with the study design methods described by Goodwin (1997).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7116

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 26 E. coli samples from the Russian River at Odd Fellows Beach and Steelhead Beach exceed the evaluation guideline. At Odd Fellows Beach, samples concentrations range from 6.3 to 51.2 MPN / 100 ml. At Steelhead Beach, sample concentrations range from 8.4 to 41 MPN / 100 ml. Samples were collected by the Sonoma County Water Agency. Data are summarized in the "Russian River Pathogen Data Report" of the Russian River Pathogen Project Database (ICE 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from 2 sites on the mainstem Russian River as follows: (1) at Odd Fellows Beach, and (2) at Steelhead Beach.

Temporal Representation:

Samples were collected at each site once every several days from May 17 to June 28, 2007.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The quality assurance information for these data is unknown.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6076

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Five of the 83 E. coli samples from the Russian River at Monte Rio Beach exceed the evaluation guideline. Concentrations range from 10 to 1,071 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2002 - 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from the mainstem Russian River at Monte Rio Beach in Monte Rio. The sampling site is located downstream of the children's swim area. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

Samples were generally collected once a week during the summer months from Memorial Day to Labor Day in 2002-2003 and 2005-2007. Sample for 2008 were collected from May to July. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7073

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the 2 E. coli samples from the Dutch Bill Creek exceed the evaluation guideline. Concentrations range from 602 to 870 MPN / 100 ml. The samples were collected by the Community Clean Water Institute (CCWI 2006).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from 2 locations in Dutch Bill Creek as follows: (1) from Dutch Bill Creek at the fish ladder; and (2) from Dutch Bill Creek at the Graton Road and Main Street bridge in Occidental.

Temporal Representation:

The samples were collected on December 19, 2005.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6131

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Three of the 3 E. coli samples from Dutch Bill Creek exceed the evaluation guideline. Concentrations range from 933 to 50,000 MPN / 100 ml. The samples were collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003).

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Samples were collected from 3 sites in Dutch Bill Creek as follows: (1) at Camp Meeker / Alliance Redwoods Camp; (2) at Graton Road at Bohemian Highway; and (3) in Dutch Bill Creek's headwaters at Graton Road.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6094

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Since less than 5 samples over a 30-day period were collected, the evaluation guideline is used for comparison to grab samples. None of the 3 fecal coliform samples collected from Fife Creek exceed the evaluation guideline. Sample concentrations range from less than 2 to 140 MPN / 100 ml. The samples were collected by Regional Water Board staff as part of a targeted sampling event on Fife Creek. Data are summarized by Goodwin (1999).

Data Reference:

Interoffice Communication from Cathy Goodwin to the Russian River Monitoring File Regarding Fife Creek Monitoring Data. North Coast Regional Water Quality Control Board. July 9, 1999

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Per the "Draft Guidance for Fresh Water Beaches" (DHS 2006): Beach posting is recommended when single sample fecal coliform levels exceed 400 MPN / 100 ml. *Note: MPN is the most probable number of coliform units.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from 3 sites in Fife Creek, a tributary to the Russian River. The first site is Upper Fife Creek, which is located immediately upstream of the Armstrong Woods State Preserve upper parking area and picnic grounds. The second site is Mid Fife Creek, which is located approximately 500' downstream of the Armstrong Woods Ranger Kiosk. The third site is Fife Creek at Mill Street, which is located at the dead end of Mill Street.

Temporal Representation:

The samples were collected on June 17, 1999, as instantaneous grab samples and do not represent diurnal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Minimal quality control was conducted as described by Goodwin (1999).

QAPP Information Reference(s):

Interoffice Communication from Cathy Goodwin to the Russian River Monitoring File Regarding Fife Creek Monitoring Data. North Coast Regional Water Quality Control Board. July 9, 1999

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6981

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In the Russian River at Forestville Access Beach, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 14 e. coli samples collected, 6 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 6 median values, none exceed the objective. E.coli median values range from 10 to 20 MPN / 100 ml.

The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at Forestville Access Beach near Hacienda. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

In 2007, samples were collected from July 3 to August 7. In 2008, samples were collected from Memorial Day to July 15. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6079

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In total between 1992 and 2007, of the 80 median fecal coliform or median e. coli samples collected from the Russian River at Odd Fellows Beach, 3 exceed the objective.

Fecal coliform samples were collected from 1992 to 2001. Of the 68 fecal coliform samples collected, 45 median fecal coliform concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 45 median values, 3 exceed the objective. The median fecal coliform values range from 11 to 70 MPN / 100 ml.

From 2002 to 2007, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 51 e. coli samples collected,
35 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 35 median values, none exceed the objective. E.coli median values range from 10 to 31 MPN / 100 ml.

The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 1992 to 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from the mainstem Russian River at Odd Fellows Bridge near Korbel. The sampling site is accessed via Odd Fellows Park Road and the samples are collected by wading from the small sandy beach upstream of the summer bridge as far into the main river flow as possible.

Temporal Representation:

Individual samples were collected in June 1992, October 1992, and June 1994. The majority of the samples were generally collected once a week during the summer months between Memorial Day and Labor Day from 1997 to 2003 and from 2005 - 2007. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6985

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In the Russian River at Steelhead Beach, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 72 e. coli samples collected, 48 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these48 median values, none exceed the objective. E.coli median values range from 10 to 30 MPN / 100 ml.

The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2002 to 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at Steelhead Beach near Forestville. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

The samples were generally collected once a week during the summer months between Memorial Day and Labor Day from 2002 to 2003 and from 2005 - 2007. In 2008, samples were collected once a week during the summer months between Memorial Day and July 15. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6039

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

103

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In total between 1992 and 2008, of the 103 median fecal coliform or median e. coli samples collected from the Russian River at Johnson¿s Beach, 4 exceed the objective.

Fecal coliform samples were collected from 1997 to 2001. Of the 70 fecal coliform samples collected, 48 median fecal coliform concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 48 median values, 2 exceed the objective. The median values range from 13 to 70 MPN / 100 ml.

From 2002 to 2008, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 78 e. coli samples collected,
55 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 55 median values, 2 exceed the objective. E.coli median values range from 10 to 51 MPN / 100 ml.

The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 1992 to 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from the mainstem Russian River at Johnson's Beach in Guerneville. The Johnson's Beach sampling site is located downstream of the children's swim area and upstream of the bridge. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

The samples were generally collected once a week during the summer months between Memorial Day and Labor Day from 1997 to 2003 and from 2005 - 2007. In 2008, samples were collected once a week during the summer months between Memorial Day and July 15. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46614

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 19 fecal coliform samples collected from the Russian River at Healdsburg Memorial Beach, 12 median fecal coliform concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 12 median values, 7 exceed the objective. Median value concentrations range from 30 to 130 MPN / 100 ml. Samples were collected by Regional Water Board staff as part of a targeted sampling event on the Russian River around Fitch Mountain. Data are summarized by Goodwin (1997). This LOE is an duplicate of LOE 6118 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body, with a minor edit to reflect that there were 19 samples collected (not 20). The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. LOE 6118 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected weekly from April 25 to September 6, 1995.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Samples were collected in accordance with the study design methods described by Goodwin (1997).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46613

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

104

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In total between 1992 and 2008, of the 104 median fecal coliform or median e. coli samples collected from the Russian River at Healdsburg Memorial Beach, 49 exceed the objective. Fecal coliform samples were collected from 1980 to 2001. Of the 117 fecal coliform samples collected, 57 median fecal coliform concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 57 median values, 44 exceed the objective. The median values ranged from 49 to 240 MPN / 100 ml. From 2002 to 2008, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 71 e. coli samples collected, 47 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 47 median values, 5 exceed the objective. E.coli median values range from 10 to 53 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 1980 to 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008). This LOE is an exact duplicate of LOE 5936 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 5936 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at Healdsburg Memorial Beach near Healdsburg. Samples collected in 2001, from May to June 11, 2002, and from May to June 26, 2007, were collected from the west bank. All the rest of the samples were collected from the east bank in front of lifeguard stand 3 at the downstream end of the swim area. Samples were collected as far into the main river flow as possible while wading.

Temporal Representation:

The samples were collected once in June 1980, October 1986, June 1988, and once a month from June to August 1989. In 1987-1994, 1997-2003, and 2005-2006, samples were generally collected once a week during the summer months between Memorial Day and Labor Day. In 2007, samples were collected from July 3 to August 7. In 2008, samples were collected from Memorial Day to July 15. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6075

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

103

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In total between 1997 and 2008, of the 103 median fecal coliform or median e. coli samples collected from the Russian River at Monte Rio Beach, 29 exceed the objective.

Fecal coliform samples were collected from 1997 to 2001. Of the 70 fecal coliform samples collected, 49 median fecal coliform concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 49 median values, 16 exceed the 50 MPN / 100 ml objective and 4 exceed the 400 MPN / 100 ml objective. Fecal coliform median values range from 2 to 9200 MPN / 100 ml.

From 2002 to 2008, e.coli samples were collected while fecal coliform samples were not collected. Since e. coli is one of the group of bacteria that comprise the fecal coliform group, it is logical that if median e.coli concentrations for any 30-day period are greater than 50 MPN / 100 ml, then the median fecal coliform concentrations for any 30-day period will also be greater than 50 MPN / 100 ml. Of the 78 e. coli samples collected,
54 median e. coli concentration values were calculated based on a minimum of not less than 5 samples for any 30-day period. Of these 54 median values, 9 exceed the objective. E.coli median values range from 10 to 178 MPN / 100 ml.

The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 1997 to 2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133823

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

The Sonoma County Department of Health Services (SoCoDHS) uses data on fecal indicator bacteria concentrations to post freshwater beaches along the Russian River with public health advisories that warn against swimming and water recreation. Public health advisories for fecal indicator bacteria were issued at multiple mainstem Russian River beaches by SoCoDHS between 2013 and 2016. Sample results exceeded SoCoDHS public health advisory levels on
1 occasion at Forestville Access Beach, 2 occasions at Johnson's Beach, and 5 occasions at Monte Rio Beach in the Dutch Bill Creek-Russian River HUC-12, and these exceedances represent an impact to the recreational beneficial use (REC-1).

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Beach monitoring data are assessed to determine attainment of the beneficial use. Data are not assessed to determine attainment of an objective or criteria, and no objective or criteria is included here.

Objective/Criterion Reference:

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

Evaluation Guideline:

When making a listing or delisting decision based on the situation-specific weight of the evidence factor and if beach use or beach closure information is available, such information shall be evaluated. Posting of public health advisories at freshwater beaches along the Russian River occurs when fecal indicator bacteria sampling results exceed the following values: Escherichia coli (E. coli) 235 MPN/100ml; Total Coliform 10,000 MPN/100ml.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Samples were collected at Forestville Access Beach, Sunset Beach, Johnson's Beach, Monte Rio Beach, and Patterson Point in the Dutch Bill Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/28/2013 to 9/19/2016.

Environmental Conditions:

QAPP Information:

Data were collected in accordance with the Russian River Pathogen Indicator Bacteria TMDL QAPP (Version 1.0), Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan QAPP (Version 1.0), and/or the Russian River Pathogen Project QAPP.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133756

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

The Sonoma County Department of Health Services (SoCoDHS) uses data on fecal indicator bacteria concentrations to post freshwater beaches along the Russian River with public health advisories that warn against swimming and water recreation. Public health advisories for fecal indicator bacteria were issued at multiple mainstem Russian River beaches by SoCoDHS between 2013 and 2016. Sample results exceeded SoCoDHS public health advisory levels on 1 occasion at Steelhead Beach in the Porter Creek-Russian River HUC-12, and this represents an impact to the recreational beneficial use (REC-1).

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

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:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Samples were collected at Steelhead Beach in the Porter Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected 5/28/2013-9/19/2016.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133972

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

HuBac concentrations >1000/100mL were found in both dry and wet weather samples in the following HUC-12s within the Guerneville HSA: Brooks Creek- Russian River HUC-12, Dutch Bill Creek-Russian River HUC-12, Porter Creek-Russian River HUC-12, and Willow Creek-Russian River HUC-12.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

HuBac data are assessed to determine attainment of the beneficial use. Data are not assessed to determine attainment of an objective or criteria, and no objective or criteria is included here.

Objective/Criterion Reference:

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

Evaluation Guideline:

HuBac (Bacteroides) are present in the human gut and do not survive long outside of the human gut. When present in the water column, measurable HuBac indicate the recent discharge of human fecal waste. There is no defined health-based threshold associated with HuBac results. The detection limit for HuBac is <60/100mL. HuBac concentrations >1000/100mL, which is two orders of magnitude greater than the detection limit, is reliable evidence of the presence of human fecal waste.

Guideline Reference:

Detection of the human specific Bacteroides genetic marker provides evidence of widespread sewage contamination of stormwater in the urban environment.

Spatial Representation:

Samples were collected at Dutch Bill Creek, DBC (114DB0147), Forestville Access Beach, FAB (114RR1898), Johnson's Beach; JB (114RR1325), and Monte Rio Beach, MRB (114RR0898) in the Dutch Bill Creek-Russian River HUC-12; Steelhead Beach, SB (114RR2036) and Limerick Creek (114UL3960) in the Porter Creek-Russian River HUC-12; Jenner Boat Ramp, JBR (114RR0066) in the mainstem saline Willow Creek-Russian River HUC-12; and Healdsburg Veterans Memorial Beach, MB (114RR2940) in the Brooks Creek-Russian River HUC-12.

Temporal Representation:

Dry period samples were collected on 8/16/2011, 8/16/2011, 9/21/2011, 9/22/2011, 9/23/2011, 9/24/2011, 9/25/2011, 9/26/2011, 9/27/2011, 9/28/2011, and 3/5/2012. Wet period samples were collected on 10/6/2011 and 1/21/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198706

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

In the Dutch Bill Creek-Russian River HUC-12, 7 samples had >=20% of bacteria of human origin indicating strong evidence of the presence of human fecal waste in the water column and 1 sample had >=10% of bacteria of human origin indicating moderate evidence of the presence of human fecal waste in the water column.

In Porter Creek-Russian River HUC-12, 1 sample had >=20% of bacteria of human origin indicating strong evidence of the presence of human fecal waste in the water column and 1 sample had >=10% of bacteria of human origin indicating moderate evidence of the presence of human fecal waste in the water column.

In the Willow Creek-Russian River HUC-12, 1 sample had >=20% of bacteria of human origin indicating strong evidence of the presence of human fecal waste in the water column.

In the Brooks Creek-Russian River HUC-12, 2 samples had >=10% of bacteria of human origin indicating moderate evidence of the presence of human fecal waste in the water column.

These exceedances represent an impact to the recreational beneficial use (REC-1).

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

PhyloChip DNA data are assessed to determine attainment of the beneficial use. Data are not assessed to determine attainment of an objective or criteria, and no objective or criteria is included here.

Objective/Criterion Reference:

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

Evaluation Guideline:

PhyloChip DNA microarray quantifies over 59,000 bacterial taxa in a single sample by targeting variations in the 16S rRNA gene. There is no defined health-based threshold associated with PhyloChip results. There is moderate evidence of human fecal waste in the water column when 10% or greater of the taxa measured in an ambient water quality sample are associated with the human gut. When 20% or greater of the taxa measured are associated with the human gut, there is strong evidence of the presence of human fecal waste in the water column. Samples with greater than 10% of the taxa measured associated with the human gut is evidence of the presence of human fecal waste in the waterbody.

Guideline Reference:

Russian River Human Impact Study PhyloChip Microbial Community Analysis.

Guideline Reference:

Microbial source tracking in impaired watersheds using PhyloChip and machine-learning classification.

Guideline Reference:

Personal Communication between Alydda Mangelsdorf (NCRWQCB) and Eric Dubinsky (Lawrence Berkeley National Lab) about the Russian River Pathogen TMDL and PhyloChip Study.

Spatial Representation:

Samples were collected at Dutch Bill Creek / DBC (114DB0147), Johnson's Beach / JB (114RR1325), Monte Rio Beach / MRB (114RR0898), Unnamed Tributary at Foothill Drive / Site 14 (114C12FSM), Unnamed Tributary at Main Street / Site 7 (114C05MNS), Unnamed Tributary at Market Street / Site 15 (114C13LSA), Unnamed Tributary at Old Monte Rio Road / Site 4 (114C030MR), Unnamed Tributary at River Drive / Site 3 (114C02SPR), and Unnamed Tributary at River Road near Rio Nido / Site 8 (114C06VRG) in the Dutch Bill Creek-Russian River HUC-12.

Samples were collected at Steelhead Beach / SB (114RR2036), Limerick Creek (114UL3960), Unnamed Tributary at Del Rio Court / Site 6 (114DDRC59), and Unnamed Tributary at Trenton Road / Site 5 (114C04TRF) in the Porter Creek-Russian River HUC-12.

Samples were collected from Jenner Boat Ramp / JBR (114RR0066), Unnamed Tributary at River Road near Duncan Road / Site 2 (114C01EDR), and Unnamed Tributary at Moscow Road / Site 9 (114C07MRC) in the Willow Creek-Russian River HUC-12.

Samples were collected at Healdsburg Veteran's Memorial Beach (114RR2940), Camp Rose Beach (114RR3119), Unnamed Tributary at Redwood Drive / Healdsburg AOC / Site 13 (114C11RDH), Unnamed Tributary at Fitch Mountain Road / Healdsburg HD-HR / Site 1 (114DFMR68) in the Brooks Creek-Russian River HUC-12.

Temporal Representation:

Dry weather samples were collected on 8/16/2011, 8/18/2011, 12/3/2012, 3/6/2013, 12/3/2012. Wet weather samples were collected on 10/6/2011, 12/3/2012, 3/6/2013, 3/20/2013, and 4/4/2013. All samples were collected from 8/16/2011 and 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198722

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

The Sonoma County Department of Health Services (SoCoDHS) uses data on fecal indicator bacteria concentrations to post freshwater beaches along the Russian River with public health advisories that warn against swimming and water recreation. Public health advisories for fecal indicator bacteria were issued at multiple mainstem Russian River beaches by SoCoDHS between 2013 and 2016. Sample results exceeded SoCoDHS public health advisory levels on 4 occasions at Healdsburg Veterans Memorial Beach in the Brooks Creek-Russian River HUC-12, and this represents an impact to the recreational beneficial use (REC-1).

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

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:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Samples were collected at Del Rio Woods Beach, Camp Rose Beach, and Healdsburg Veterans Memorial Beach in the Brooks Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/28/2013 to 9/19/2016.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198723

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

141

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of 141 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 0 of 141 geometric means calculated from Summer/Dry data (April-October) in the Porter Creek-Russian River HUC-12 exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California - Bacteria Provisions and a Water Quality Standards Variance Policy: The bacteria water quality objective for all waters where the salinity is equal to or less than 1 part per thousand (ppth) 95 percent or more of the time during the CALENDAR YEAR is: a six-week rolling GEOMETRIC MEAN of Escherichia coli (E. coli) not to exceed 100 colony forming units (cfu) per 100 milliliters (mL), calculated weekly.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Russian River at Riverfront Park (114RR2370), Russian River at Steelhead Beach (114RR2036), Unnamed Tributary at Del Rio Court (114DDRC59), Unnamed Tributary at Old Redwood Highway (114UL3960), and Unnamed Tributary at Trenton Road (114C04TRF) in the Porter Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 7/9/2002 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

185856

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

284

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of 284 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 0 of 284 geometric means calculated from Summer/Dry data (April-October) in Brooks Creek-Russian River HUC-12 exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Russian River at Camp Rose Beach (114RR3119), Russian River at Diggers Bend (Diggers_Bend_SCWA), Russian River at Healdsburg Veterans Memorial Beach (114RR2940), Unnamed Tributary at Fitch Mountain Road (114DFMR68), and Unnamed Tributary at Redwood Drive (114C11RDH) in the Brooks Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/28/2002 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198724

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There is no objective, criterion, or threshold for E. coli in saline water; therefore, it is unable to be determined if the E. coli samples support the REC-1 beneficial use in the saline water portion of Willow Creek-Russian River HUC-12.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

E. coli data are assessed to determine attainment of the beneficial use. Data are not assessed to because there is no objective, criteria, or threshold for E. coli in saline water.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Russian River at Jenner Boat Ramp (114RR0066) in the saline water portion of the Willow Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 1/23/2012 to 3/2/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198725

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

8 of 114 statistical threshold values (STVs) from year-round data (November-October), 6 of 10 STVs calculated from Winter/Wet data (November-March), and 2 of 104 STVs calculated from Summer/Dry data (April-October) in the Brooks Creek-Russian River HUC-12 Russian River tributaries exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California - Bacteria Provisions and a Water Quality Standards Variance Policy: The bacteria water quality objective for all waters where the salinity is equal to or less than 1 part per thousand (ppth) 95 percent or more of the time during the CALENDAR YEAR is: a STATISTICAL THRESHOLD VALUE (STV) of Escherichia coli of 320 cfu/100 mL not to be exceeded by more than 10 percent of the samples collected in a CALENDAR MONTH, calculated in a static manner.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 5/28/2002 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198726

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

211

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of 211 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 0 of 211 geometric means calculated from Summer/Dry data (April-October) in Brooks Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The national criteria for enterococci are set as a geometric mean (30 cfu/100 mL) or the statistical threshold value (110 cfu/100 mL) to ensure no more than 32 illnesses per 1000 recreators, as defined by U.S. EPA (2012).

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Unnamed Tributary at Redwood Drive (114C11RDH), Unnamed Tributary at Fitch Mountain Road (114DFMR68), Russian River at Healdsburg Veterans Memorial Beach (114RR2940), Russian River at Camp Rose Beach (114RR3119), and Russian River at Diggers Bend (Diggers_Bend_SCWA) in the Brooks Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 7/5/2006 to 7/9/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198728

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

1 of 1 statistical threshold values (STVs) from year-round data (November-October), 1 of 1 STVs calculated from Winter/Wet data (November-March), and 0 of 0 STVs calculated from Summer/Dry data (April-October) in the freshwater tributary portion of the Willow Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

A sample was collected at Unnamed Tributary at Moscow Road (114C07MRC).

Temporal Representation:

A sample was collected on 12/3/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

198727

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

40 of 87 statistical threshold values (STVs) from year-round data (November-October), 7 of 10 STVs calculated from Winter/Wet data (November-March), and 33 of 77 STVs calculated from Summer/Dry data (April-October) in Brooks Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

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:

Temporal Representation:

Samples were collected from 7/5/2006 to 7/9/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31878

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seven samples collected at Russian River at Freeze Out Creek exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Freeze Out Creek.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31879

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the seven samples collected at Russian River at Bridge Haven exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Bridge Haven.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31810

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-nine samples collected at Russian River at Forestville Access Beach exceeded the enterococcus objective.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011):

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34366

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Healdsburg Memorial Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34363

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the twenty geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Healdsburg Memorial Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31850

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-one samples collected at Russian River at Steelhead Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31936

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Steelhead Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected fromRussian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31987

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Three of the eightteen geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Steelhead Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31851

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-one samples collected at Russian River at Forestville Access Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31937

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Forestville Access Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31809

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four of the twenty-nine samples collected at Russian River at Steelhead Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34384

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the twenty-eight samples collected at Healdsburg Memorial Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample Enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34381

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the twenty-three samples collected at Russian River at Healdsburg Memorial Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31988

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the eighteen geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Forestville Access Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31845

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Twelve of the twenty-nine samples collected at Russian River at Johnson's Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31984

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seventeen geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Camp Rose.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31994

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Fifteen of the twenty-three geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Johnson's Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for entercoccus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected fromRussian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31859

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Twoof the twenty-nine samples collected at Russian River at Monte Rio Beach exceeded the enterococcus objective.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31858

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Three of the twenty-nine samples collected at Russian River at Johnson's Beach exceeded the enterococcus objective.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31818

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-eight samples collected at Russian River Camp Rose exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample Enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches" (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31844

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Five of the twenty-five samples collected at Russian River at Sunset Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Sunset Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31999

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Twelve of the 24 geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Monte Rio Kiddies Swim Area.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Kiddies Swim Area.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31993

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Six of the twenty geometric means calculated exceeded the evaluation guideline for entercoccus. The samples were collected at Russian River at Sunset Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for entercoccus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Sunset Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31917

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eleven of the twenty-eight samples collected at Russian River at Monte Rio Beach exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31916

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eleven of the twenty-nine samples collected at Russian River at Monte Rio Kiddies Swim Area exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Kiddies Swim Area.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31927

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four of the twenty-three geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River Camp Rose.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31841

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eleven of the twenty-nine samples collected at Russian River at Camp Rose exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009 and June 4, 2010.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31930

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Five of the twenty-three geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Johnson's Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31966

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Five of the 21 geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Monte Rio Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31931

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Three of the twenty-three geometric means calculated exceeded the evaluation guideline for enterococcus. The samples were collected at Russian River at Monte Rio Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for enterococcus exceeds 33 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7081

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 1 Enterococcus samples collected from the Russian River at Johnson's Beach exceeds the evaluation guideline. The sample concentration is 10 MPN / 100 ml. The sample was collected by the Community Clean Water Institute (CCWI 2006).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Per the "Draft Guidance for Fresh Water Beaches" (DHS 2006): Beach posting is recommended when single sample Enterococcus levels exceed 61 MPN / 100 ml. *Note: MPN is the most probable number of coliform units.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The sample was collected from the mainstem Russian River at Johnson's Beach in Guerneville.

Temporal Representation:

The sample was collected on November 21, 2005.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The sample was collected in accordance with the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

7083

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 1 Enterococcus samples collected from the Russian River at Odd Fellows Bridge exceeds the evaluation guideline. The sample concentration is 41 MPN / 100 ml. The sample was collected by the Community Clean Water Institute (CCWI 2006).

Data Reference:

Community Clean Water Institute Master Data for 2005. Downloaded from http://ccwi.org/issues/data.htm on August 25, 2008

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The sample was collected from the mainstem Russian River, just downstream of the Odd Fellows Bridge.

Temporal Representation:

The sample was collected on November 21, 2005.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The sample was collected in accordance with the "Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods" (CCWI 2007).

QAPP Information Reference(s):

Community Clean Water Institute Volunteer Water Quality Monitoring Program Sampling and Analysis Methods. Updated April 12, 2007

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

5951

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Water Contact Recreation

Number of Samples:

103

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 103 Enterococcus samples from the Russian River at Steelhead Beach, Forestville Access Beach, Odd Fellows Bridge, and Johnson's Beach exceeds the evaluation guideline. At Steelhead Beach, 38 samples were collected with concentrations ranging less than 10 to 31 MPN / 100 ml. At Forestville Access Beach, 18 samples were collected with concentrations also ranging from less than 10 to 31 MPN / 100 ml. At Odd Fellows Bridge, 11 samples were collected with a constant concentration of 10 MPN / 100 ml. At Johnson's Beach, 38 samples were collected with concentrations ranging from less than 10 to 63 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2006-2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Temporal Representation:

For all the samples collected between 2006 and 2007, samples were generally collected once a week during the summer months between Memorial Day and Labor Day. For all of the samples collected in 2008, samples were collected once a week from May 27 to July 15, 2008. The samples were often collected on the same day of the week and at the same time of day. For Steelhead Beach and Johnson¿s Beach, the samples were collected in 2006-2008. For Forestville Access Beach, the samples were collected in 2007-2008. For Odd Fellows Bridge, the samples were collected in 2006.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46608

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 38 Enterococcus samples from the Russian River at Healdsburg Memorial Beach exceeds the evaluation guideline. Sample concentrations ranged from less than 10 to 109 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2006-2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008). This LOE is an exact duplicate of LOE 5943 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 5943 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. In no case shall coliform concentrations in waters of the North Coast Region exceed the following: In waters designated for contact recreation (REC-1), the median fecal coliform concentration based on a minimum of not less than 5 samples for any 30-day period shall not exceed 50 MPN* / 100 ml, nor shall more than 10% of total samples during any 30-day period exceed 400 MPN / 100 ml. At all areas where shellfish may be harvested for human consumption (SHELL), the fecal coliform concentration throughout the water column shall not exceed 43 MPN / 100 ml for a 5-tube decimal dilution test or 49 MPN / 100 ml when a three-tube decimal dilution is used. *Note: MPN is the most probable number of coliform units.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Per the "Draft Guidance for Fresh Water Beaches" (DHS 2006): Beach posting is recommended when single sample Enterococcus levels exceed 61 MPN / 100 ml.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Temporal Representation:

The samples were generally collected once a week during the summer months between Memorial Day and Labor Day in 2006 to 2007. Samples for 2008 were collected from May to July. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46609

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 14 Enterococcus samples from the Russian River at Healdsburg Memorial Beach exceed the evaluation guideline. Sample concentrations range from 7 to 21 MPN / 100 ml. Samples were collected by Regional Water Board staff as part of a targeted sampling event on the Russian River around Fitch Mountain. Data are summarized by Goodwin (1997). This LOE is an exact duplicate of LOE 6102 from the Russian River HU, Middle Russian River HA, Geyserville HSA water body. The data from the Russian River at Healdsburg Memorial Beach was incorrectly assessed in the Geyserville HSA water body, and this LOE represents the transfer of that data to the correct water body. No changes were made to the original LOE aside from placing it in the correct water body. LOE 6102 will not be used in the Indicator Bacteria Decision in the Geyserville HSA, and will be retired after the change has been reflected and this listing cycle has been completed.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Per the "Draft Guidance for Fresh Water Beaches" (DHS 2006): Beach posting is recommended when single sample Enterococcus levels exceed 61 MPN / 100 ml.

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Temporal Representation:

Samples were collected weekly from May 30 to September 6, 1995.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Samples were collected in accordance with the study design methods described by Goodwin (1997).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

6077

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:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Four of the 38 Enterococcus samples from the Russian River at Monte Rio Beach exceed the evaluation guideline. Concentrations range from less than 10 to 74 MPN / 100 ml. The samples were collected by staff of the North Coast Regional Water Quality Control Board. The data for 2006-2007 are presented in the Russian River Pathogen Data Report of the Russian River Pathogen Project Database (ICE 2008). The data for 2008 are presented by the Regional Water Board (NCRWQCB 2008).

Data Reference:

Russian River Pathogen Data Report of the Russian River Pathogen Project Database. Information Center for the Environment. Version 1. Beta. 2008. http://rrpp.ice.ucdavis.edu/

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

Temporal Representation:

Samples were generally collected once a week during the summer months between Memorial Day and Labor Day in 2006 to 2007. Samples for 2008 were collected from May to July. The samples were often collected on the same day of the week and at the same time of day.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

The samples were collected in accordance with the "Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches" (Goodwin 2007).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133735

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

1 of 1 statistical threshold values (STVs) from year-round data (November-October), 1 of 1 STVs calculated from Winter/Wet data (November-March), and 0 of 0 STVs calculated from Summer/Dry data (April-October) in the fresh water portion of Willow Creek-Russian River HUC-12 Russian River tributaries exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California - Bacteria Provisions and a Water Quality Standards Variance Policy: The bacteria water quality objective for all waters where the salinity is equal to or less than 1 part per thousand (ppth) 95 percent or more of the time during the CALENDAR YEAR is: a STATISTICAL THRESHOLD VALUE (STV) of Escherichia coli of 320 cfu/100 mL not to be exceeded by more than 10 percent of the samples collected in a CALENDAR MONTH, calculated in a static manner.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

A sample was collected at Unnamed Tributary at Moscow Road (114C07MRC) in the fresh water portion of Willow Creek-Russian River HUC-12.

Temporal Representation:

A sample was collected on 12/3/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133764

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

387

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

1 of 387 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 1 of 387 geometric means calculated from Summer/Dry data (April-October) in Dutch Bill Creek-Russian River HUC-12 exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Dutch Bill Creek at Fir Road (114DB0147), Mays Creek at Neeley Road (114UM0355), Russian River at Forestville Access Beach (114RR1898), Russian River at Hacienda Bridge (Hacienda_Bridge_SCWA), Russian River at Johnsons Beach (114RR1325), Russian River at Monte Rio Beach (114RR0898), Unnamed Tributary at Foothill Drive (114C12FSM), Unnamed Tributary at Main Street (114C05MNS), Unnamed Tributary at Market Street (114C13LSA), Unnamed Tributary at Old Monte Rio Road (114C03OMR), Unnamed Tributary at River Drive (114C02SPR), Unnamed Tributary at River Road near Duncan Road (114C01EDR), and Unnamed Tributary at River Road near Rio Nido (114C06VRG) in the Dutch Bill Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected between 5/28/2002 and 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133734

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

17 of 168 statistical threshold values (STVs) from year-round data (November-October), 11 of 24 STVs calculated from Winter/Wet data (November-March), and 6 of 144 STVs calculated from Summer/Dry data (April-October) in Dutch Bill Creek-Russian River HUC-12 exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California - Bacteria Provisions and a Water Quality Standards Variance Policy: The bacteria water quality objective for all waters where the salinity is equal to or less than 1 part per thousand (ppth) 95 percent or more of the time during the CALENDAR YEAR is: a STATISTICAL THRESHOLD VALUE (STV) of Escherichia coli of 320 cfu/100 mL not to be exceeded by more than 10 percent of the samples collected in a CALENDAR MONTH, calculated in a static manner.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 5/28/2002 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133733

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Ten of 64 statistical threshold values (STVs) from year-round data (November-October), 8 of 10 STVs calculated from Winter/Wet data (November-March), and 2 of 54 STVs calculated from Summer/Dry data (April-October) in Porter Creek-Russian River HUC-12 exceed the objective for E. coli.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California - Bacteria Provisions and a Water Quality Standards Variance Policy: The bacteria water quality objective for all waters where the salinity is equal to or less than 1 part per thousand (ppth) 95 percent or more of the time during the CALENDAR YEAR is: a STATISTICAL THRESHOLD VALUE (STV) of Escherichia coli of 320 cfu/100 mL not to be exceeded by more than 10 percent of the samples collected in a CALENDAR MONTH, calculated in a static manner.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 7/9/2002 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31880

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seven samples collected at Russian River at Bridge Haven exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Bridge Haven.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31883

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the seven samples collected at Russian River at Jenner exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Jenner.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31921

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seven samples collected at Russian River at Freeze Out Creek exceeded the E.coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Freeze Out Creek.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31986

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the seventeen geometric means calculated exceeded the evaluation guideline for E.coli. The samples were collected at Russian River at Steelhead Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31932

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Monte Rio Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31843

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty samples collected at Russian River at Steelhead Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31995

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seventeen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Johnson's Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected fromRussian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31935

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Steelhead Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected fromRussian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31811

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the twenty-nine samples collected at Russian River at Forestville Access Beach exceeded the E. coli objective.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011):.

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31817

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-nine samples collected at Russian River Camp Rose exceeded the E. coli evaluation guidline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011)

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches" (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31998

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the nineteen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Monte Rio Kiddies Swim Area.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Kiddies Swim Area.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34380

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-one samples collected at Russian River at Healdsburg Memorial Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31849

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the twenty-two samples collected at Russian River at Monte Rio Kiddies Swim Area exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Kiddies Swim Area.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31967

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the nineteen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Monte Rio Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34362

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the eighteen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Healdsburg Memorial Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Healdsburg Memorial Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31846

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty samples collected at Russian River at Johnson's Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31854

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty samples collected at Russian River at Sunset Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Sunset Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31857

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-nine samples collected at Russian River at Johnson's Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Johnson's Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31808

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-nine samples collected at Russian River at Steelhead Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011)

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011)

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Steelhead Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31991

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seventeen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Sunset Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Sunset Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31839

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty samples collected at Russian River at Camp Rose exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Spatial Representation:

The samples were collected from Russian River at Camp Rose.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31989

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the seventeen geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Forestville Access Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31918

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the twenty-two samples collected at Russian River at Monte Rio Beach exceeded the E. coli evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample E. coli levels exceed 235 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Monte Rio Beach.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31938

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the twenty-three geometric means calculated exceeded the evaluation guideline for E. coli. The samples were collected at Russian River at Forestville Access Beach.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when the geometric mean for E. coli exceeds 126 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Forestville Access Beach.

Temporal Representation:

The samples were collected once a week from the end of May to September 2009 and 2010.

Environmental Conditions:

QAPP Information:

The data was collecte by the NCRWQCB under the Protocol for Conducting Russian River Bacteriological Sampling at Summer Recreational Beaches.

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133826

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of 54 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 0 of 54 geometric means calculated from Summer/Dry data (April-October) in the Russian River mainstem of Willow Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective for all waters where the salinity is greater than 1 ppth more than 5 percent of the time during the CALENDAR YEAR is: a six-week rolling GEOMETRIC MEAN of enterococci not to exceed 30 cfu/100 mL, calculated weekly, with a STV of 110 cfu/100 mL not to be exceeded by more than 10 percent of the samples collected in a CALENDAR MONTH, calculated in a static manner.

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Russian River at Jenner Boat Ramp (114RR0066), Russian River at Bridgehaven (Bridgehaven_SCWA), and Russian River at Duncans Mills (Duncans_Mills_SCWA) in the saline mainstem of the Willow Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/28/2009 to 12/3/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133825

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

12 of 29 statistical threshold values (STVs) from year-round data (November-October), 1 of 2 STVs calculated from Winter/Wet data (November-March), and 11 of 27 STVs calculated from Summer/Dry data (April-October) in saline mainstem of the Willow Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Amendment to the Water Quality Control Plan for Ocean Waters of California - Bacteria Provisions and a Water Quality Standards Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 5/28/2009 to 12/3/2012.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133772

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

135

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

67 of 135 statistical threshold values (STVs) from year-round data (November-October), 22 of 23 STVs calculated from Winter/Wet data (November-March), and 45 of 112 STVs calculated from Summer/Dry data (April-October) in Dutch Bill Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Dutch Bill Creek at Fir Road (114DB0147), Mays Creek at Neeley Road (114UM0355), Russian River at Casini Ranch (Casini_Ranch_SCWA), Russian River at Forestville Access Beach (114RR1898), Russian River at Hacienda Bridge (Hacienda_Bridge_SCWA), Russian River at Johnsons Beach (114RR1325), Russian River at Monte Rio Beach (114RR0898), Unnamed Tributary at Foothill Drive (114C12FSM), Unnamed Tributary at Main Street (114C05MNS), Unnamed Tributary at Market Street (114C13LSA), Unnamed Tributary at Old Monte Rio Road (114C03OMR), Unnamed Tributary at River Drive (114C02SPR), Unnamed Tributary at River Road near Duncan Road (114C01EDR), Unnamed Tributary at River Road near Rio Nido (114C06VRG) in the Dutch Bill Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/30/2006 to 7/9/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133798

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

310

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of 310 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 2 of 310 geometric means calculated from Summer/Dry data (April-October) in Dutch Bill Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 5/30/2006 to 7/9/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133755

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

112

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of 112 geometric means calculated from year-round data (November-October), 0 of 0 geometric means calculated from Winter/Wet data (November-March), and 0 of 112 geometric means calculated from Summer/Dry data (April-October) in Porter Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Russian River at Riverfront Park (114RR2370), Russian River at Steelhead Beach (114RR2036), Unnamed Tributary at Del Rio Court (114DDRC59), and Unnamed Tributary at Trenton Road (114C04TRF) in the Porter Creek-Russian River HUC-12.

Temporal Representation:

Samples were collected from 5/30/2006 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133748

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Statistical Threshold Value

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

23 of 53 statistical threshold values (STVs) from year-round data (November-October), 10 of 10 STVs calculated from Winter/Wet data (November-March), and 13 of 43 STVs calculated from Summer/Dry data (April-October) in Porter Creek-Russian River HUC-12 exceed the criterion for Enterococci.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation utilized in the RWQCB1 Russian River TMDL .

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Samples were collected from 5/30/2006 to 4/4/2013.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan - Russian River Pathogen Project.

QAPP Information Reference(s):

Russian River Pathogen Indicator Bacteria TMDL - Supplemental Sampling Plan Quality Assurance Project Plan.

Line of Evidence (LOE) for Decision ID 79794, Indicator Bacteria	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

31899

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the seven samples collected at Russian River at Jenner exceeded the enterococcus evaluation guideline.

Data Reference:

Data for Bacteria and Nutrient in Sonoma County Water Agency, 2009-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The bacteriological quality of waters of the North Coast Region shall not be degraded beyond natural background levels. Water Quality Control Plan, North Coast Region (NCRWQCB 2011).

Objective/Criterion Reference:

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

Evaluation Guideline:

Beach posting is recommended when single sample enterococcus levels exceed 61 MPN / 100 ml. Draft Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Spatial Representation:

The samples were collected from Russian River at Jenner.

Temporal Representation:

The samples were collected once a week from the end of May to October 2009.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan for Region One for Bacteriological Sampling.


DECISION ID	78316	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	Specific Conductivity
Final Listing Decision:	Do Not 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
Sources:	A Source Unknown
Expected TMDL Completion Date:	2025
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under this section of the policy, a minimum of one line of evidence is needed to assess listing status. Twenty-one lines of evidence are available in the administrative record to assess this pollutant. Nine of twelve samples from the mainstem Russian River at Healdsburg Memorial Beach from the railroad bridge to highway 101 exceed the objective. Zero of three samples from Dutch Bill Creek (LOE 46818), one of one sample from Hobson Creek (LOE 46817), zero of four samples from Fife Creek (LOEs 46819 and 46820), and four of 26 samples from the remainder of the mainstem Russian River exceed the objective for MUN. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing the mainstem Russian River at Healdsburg Memorial Beach from the railroad bridge to the Highway 101 bridge from the section 303(d) list for specific conductivity 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 twelve samples from the mainstem Russian River at Healdsburg Memorial Beach from the railroad bridge to highway 101 exceed the objective and this exceeds the allowable frequency listed in Table 4.1 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 met.

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

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100879

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for specific conductance. Data range from 254 - 283 micromhos.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Specific conductivity shall conform to Table 3-1 which states that water quality objective for specific conductivity has an 90% upper limit of 375 micromhos and a 50% upper limit of 285 micromhos.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR1531).

Temporal Representation:

The samples were collected between the dates 06/09/2011 - 09/27/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133920

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality standard for specific conductance. Data range from 229 - 306.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Specific conductivity shall conform to Table 3-1 which states that water quality objective for specific conductivity has an 90% upper limit of 320 micromhos and a 50% upper limit of 250 micromhos.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) Russian River below Healdsburg Memorial Beach (114RR2899).

Temporal Representation:

The samples were collected between the dates 06/01/2011 - 10/24/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46512

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Five of the six calendar years of data exceeded the specific conductivity objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). This LOE and LOE 46513 contain data originally evaluated in LOE 21323, which included data from a site that is not in this water body. The data from LOE 21323 have been split into two LOEs, with data now evaluated under the correct water body.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2007): The 90% upper limit specific conductance objective at 77 F is 320 micromhos (or mS/cm2). The 50% upper limit specific conductance objective at 77 F is 250 micromhos (or mS/cm2). The 90% and 50% upper limits represent the 90/50 percentile values for a calendar year. 90% or 50% or more of the values must be less than or equal to the upper limit.

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at Healdsburg Memorial Beach (SWAMP Station ID 114RRHMB1). Samples were collected from well-mixed flows in glides or riffles.

Temporal Representation:

At the Healdsburg Memorial Beach site samples were collected from June 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133922

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 2 of 3 samples exceeded the water quality standard for specific conductance. Data range from 239 - 404.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Specific conductivity shall conform to Table 3-1 which states that water quality objective for specific conductivity has an 90% upper limit of 320 micromhos and a 50% upper limit of 250 micromhos.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) Russian River at Healdsburg Memorial Beach(114RR2940_SWAMP).

Temporal Representation:

The samples were collected between the dates 09/28/2010 - 02/03/2014.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34438

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 2 calendar years of data exceeded the objective.

Data Reference:

RWB1 Trend Maintenance Periods FYs 2007 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for the mainstem Russian River upstream of the Laguna de Santa Rosa is a 90% upper limit of 320 uS. Therefore, 90% of the values in a calendar year must be lower than this limit. In addition the site specific objective of 50% upper limit of 250 uS which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the Russian River at Healdsburg Memorial Beach station (114RR2940).

Temporal Representation:

Samples were collected on the following dates: 11/26/2007 3/3/2008 4/7/2008 7/14/2008

Environmental Conditions:

QAPP Information:

SWAMP QAPP (2008).

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100884

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality standard for specific conductance. Data range from 244 - 324 micromhos.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR0898).

Temporal Representation:

The samples were collected between the dates 05/19/2011 - 02/03/2014.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100878

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1599).

Temporal Representation:

The samples were collected between the dates 06/02/2011 - 10/25/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133906

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1898).

Temporal Representation:

The samples were collected between the dates 05/24/2011 - 10/04/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46814

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the calendar years data for the 2 sites on the mainstem Russian River downstream of the Laguna de Santa Rosa exceeded the specific conductivity objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). This LOE replaces LOE 21494 from the 2010 Integrated Report. LOE 21494 incorrectly assessed each individual sample against the objective, instead of evaluating the calendar years worth of data against the objective as is appropriate.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2011): The 90% upper limit specific conductance objective at 77 F is 320 micromhos (or mS/cm2). The 50% upper limit specific conductance objective at 77 F is 250 micromhos (or mS/cm2). The 90% and 50% upper limits represent the 90/50 percentile values for a calendar year. 90% or 50% or more of the values must be less than or equal to the upper limit.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at 2 locations as follows: (1) at Syer Pond (SWAMP Station ID 114RRSTPD), and (2) at Wohler Dam (SWAMP Station ID 114RRWOH). Samples were collected from well-mixed flows in glides or riffles.

Temporal Representation:

Samples were collected over 2 site visits at each site during June 2001.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100882

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1159).

Temporal Representation:

The samples were collected between the dates 12/01/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46815

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the calendar years data for the sites on the mainstem Russian River downstream of the Laguna de Santa Rosa exceeded the specific conductivity objective. There were 0 of 6 exceedances for the 6 years calendar years of data for Johnsons Beach, and 0 of 1 exceedances for the single calendar year of data from each of the following sites: Odd Fellows Crossing, Monte Rio, and Vacation Beach. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). This LOE replaces LOE 21496 from the 2010 Integrated Report. LOE 21496 incorrectly assessed each individual sample against the objective, instead of evaluating the calendar years worth of data for each site against the objective as is appropriate.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2011): The 90% upper limit specific conductance objective at 77 F is 375 micromhos (or mS/cm2). The 50% upper limit specific conductance objective at 77 F is 285 micromhos (or mS/cm2). The 90% and 50% upper limits represent the 90/50 percentile values for a calendar year. 90% or 50% or more of the values must be less than or equal to the upper limit.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the mainstem Russian River at 4 locations as follows: (1) at Odd Fellows Crossing (SWAMP Station ID 114RRODDF), (2) at Johnson's Beach (SWAMP Station ID 114RRJB01), (3) at Monte Rio (SWAMP Station ID 114RRMRIO), and (4) at Vacation Beach (SWAMP Station ID 114RRVACB). Samples were collected from well-mixed flows in glides or riffles.

Temporal Representation:

At the Odd Fellows, Monte Rio, and Vacation Beach sites, samples were collected over 2 site visits at each site during June 2001. At the Johnson's Beach site, samples were collected over 22 site visits from June 2001 to June 2006. These site visits corresponded to fall, winter, spring and early summer seasonal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100883

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1041).

Temporal Representation:

The samples were collected between the dates 08/02/2011 - 10/25/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100881

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1310).

Temporal Representation:

The samples were collected between the dates 06/02/2011 - 06/27/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100877

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1644).

Temporal Representation:

The samples were collected between the dates 12/01/2011.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

100880

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 3 samples exceeded the water quality standard for specific conductance. Data range from 239 - 290 micromhos.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR1325).

Temporal Representation:

The samples were collected between the dates 10/01/2010 - 02/03/2014.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

34201

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The 2010 calendar year data did not exceed the Basin Plan objective.

Data Reference:

Photos of algae and invasive species in Laguna de Santa Rosa and Guerneville HSA with other data and information

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Per the Basin Plan (NCRWQCB 2011): 50% or more of the monthly means for a calendar year must be less than or equal to 285 micromhos, and 90% or more of the monthly means for a calendar year must be less than or equal to 375 micromhos.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at Johnson's Beach at site 00017BA0.

Temporal Representation:

Samples collected on 7/18/2010 and 8/13/2010 (samples collected every 15 minute and averaged for the day).

Environmental Conditions:

QAPP Information:

There was no quality assurance information with this data.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

133907

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 6 of 20samples exceeded the water quality standard for specific conductance. Data range from 244 - 365.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

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:

The samples were collected at 1 monitoring site(s) (114RR2036).

Temporal Representation:

The samples were collected between the dates 05/19/2011-10/04/2011 and 02/03/2014.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46818

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the 3 specific conductivity samples collected in Dutch Bill Creek exceed the specific conductivity water quality objective. Sample concentrations range from 70 to 247 uS. The samples were collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003). This LOE re-assesses data from LOE 6126 from the 2010 Integrated Report cycle, which incorrectly compared the data against the site-specific specific conductivity objective for the mainstem Russian River. The data are now compared to the secondary MCL as is appropriate.

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from 3 sites in Dutch Bill Creek as follows: (1) at Camp Meeker / Alliance Redwoods Camp; (2) at Graton Road at Bohemian Highway; and (3) in Dutch Bill Creek headwaters at Graton Road.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46817

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Zero of the 1 specific conductivity sample collected in Hobson Creek exceeds the specific conductivity water quality objective. The sample concentration is 433 uS. The sample was collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003). This LOE re-assesses data from LOE 6142 from the 2010 Integrated Report cycle, which incorrectly compared the data against the site-specific specific conductivity objective for the mainstem Russian River. The data are now compared to the secondary MCL as is appropriate.

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from 1 site in Hobson Creek where it intersects with Skyline Road near McPeak Road. Hobson Creek empties into the Russian River near Hacienda.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46819

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 1 specific conductivity samples collected in Fife Creek exceed the specific conductivity water quality objective. The sample concentration is 113 uS. The samples were collected as part of the Russian River First Flush sampling event. Data are summarized by Katznelson et al. (2003). This LOE re-assesses data from LOE 6134 from the 2010 Integrated Report cycle, which incorrectly compared the data against the site-specific specific conductivity objective for the mainstem Russian River. The data are now compared to the secondary MCL as is appropriate.

Data Reference:

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from 1 site at Fife Creek where it intersects with Highway 116.

Temporal Representation:

The samples were collected on November 7, 2002. At each site, 3 instantaneous grab samples were collected over half hour increments. The data are averaged for each site.

Environmental Conditions:

Samples were collected during the first runoff event of the rainy season.

QAPP Information:

Samples were collected in accordance with the study plan and quality control procedures described by Katznelson et al. (2003).

QAPP Information Reference(s):

2002 Russian River First Flush Summary Report. Clean Water Team, Citizen Monitoring Program of the State Water Resources Control Board

Line of Evidence (LOE) for Decision ID 78316, Specific Conductivity	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

46820

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 3 specific conductivity samples collected in Fife Creek exceed the specific conductivity water quality objective. The samples were collected as part of a targeted sampling event on Fife Creek. Data are summarized by Goodwin (1999). This LOE re-assesses data from LOE 6085 from the 2010 Integrated Report cycle, which incorrectly compared the data against the site-specific specific conductivity objective for the mainstem Russian River. The data are now compared to the secondary MCL as is appropriate.

Data Reference:

Interoffice Communication from Cathy Goodwin to the Russian River Monitoring File Regarding Fife Creek Monitoring Data. North Coast Regional Water Quality Control Board. July 9, 1999

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were collected on June 17, 1999, as instantaneous grab samples and do not represent diurnal conditions.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Minimal quality control was conducted as described by Goodwin (1999).

QAPP Information Reference(s):

Interoffice Communication from Cathy Goodwin to the Russian River Monitoring File Regarding Fife Creek Monitoring Data. North Coast Regional Water Quality Control Board. July 9, 1999


DECISION ID	103962	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	2-Methylnaphthalene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. One lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective. 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 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. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

Line of Evidence (LOE) for Decision ID 103962, 2-Methylnaphthalene	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

120821

Pollutant:

2-Methylnaphthalene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the USGS National Water Information System

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).

Objective/Criterion Reference:

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

Evaluation Guideline:

The USEPA expected safe lifetime exposure limit in drinking water for Methylnapthalene, 2-, calculated using the IRIS Reference Dose, is 28 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.004 mg/kg/day as the reference dose.

Guideline Reference:

IRIS Reference Summary (Various Pollutants)

Spatial Representation:

The samples were collected at 1 monitoring site(s) (USGS-11467002)

Temporal Representation:

The samples were collected between the dates of 2010-10-14 and 2010-10-14

Environmental Conditions:

QAPP Information:

QAPP not required for federal data

QAPP Information Reference(s):

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.


DECISION ID	103964	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	Acetaminophen
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective. 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 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. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

Line of Evidence (LOE) for Decision ID 103964, Acetaminophen	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

120901

Pollutant:

Acetaminophen

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the USGS National Water Information System

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Acetaminophen is the USEPA Aquatic Life Benchmark of 14750 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (USGS-11467002)

Temporal Representation:

The samples were collected between the dates of 2010-10-14 and 2010-10-14

Environmental Conditions:

QAPP Information:

QAPP not required for federal data

QAPP Information Reference(s):

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Line of Evidence (LOE) for Decision ID 103964, Acetaminophen	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

120844

Pollutant:

Acetaminophen

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for the USGS National Water Information System

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Acetaminophen is the USEPA Aquatic Life Benchmark of 14750 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (USGS-11467002)

Temporal Representation:

The samples were collected between the dates of 2010-10-14 and 2010-10-14

Environmental Conditions:

QAPP Information:

QAPP not required for federal data

QAPP Information Reference(s):

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.


DECISION ID	100919	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	Aldicarb
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 12 lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objectives. 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 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. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104478

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR0898)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104486

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Maximum Contaminant Level for aldicarb incorporated by reference in the Water Quality Control Plan, North Coast Basin is 3 ug/L.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2036)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104479

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Maximum Contaminant Level for aldicarb incorporated by reference in the Water Quality Control Plan, North Coast Basin is 3 ug/L.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR0898)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104483

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Maximum Contaminant Level for aldicarb incorporated by reference in the Water Quality Control Plan, North Coast Basin is 3 ug/L.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR1325)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104489

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Maximum Contaminant Level for aldicarb incorporated by reference in the Water Quality Control Plan, North Coast Basin is 3 ug/L.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2940_SWAMP)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104487

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2036)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104480

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR0898)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104490

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2940_SWAMP)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104484

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR1325)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104482

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR1325)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104488

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2940_SWAMP)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 100919, Aldicarb	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

104485

Pollutant:

Aldicarb

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB1 Monitoring data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aldicarb.

Data Reference:

Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).

Guideline Reference:

OPP Aquatic Life Benchmarks

Spatial Representation:

The samples were collected at 1 monitoring site(s) (114RR2036)

Temporal Representation:

The samples were collected between the dates of 2014-02-03 and 2014-02-03

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	101179	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

Pollutant:	Aldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 22 lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective. 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 CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

Line of Evidence (LOE) for Decision ID 101179, Aldrin	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

123858

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

State Water Board staff re-assessed SWAMP data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Aldrin, Total. Twenty sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29886 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.

Data Reference:

Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin to protect of human health from the consumption of water and organisms is 0.00013 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

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

Objective/Criterion Reference:

Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Russian River HU, Lower Russian River HA, Guerneville HSA was collected at 1 monitoring site [ Russian River at Johnson's Beach - 114RR1325]

Temporal Representation:

Data was collected over the time period 2/6/2002-11/13/2006.

Environmental Conditions:

There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.

QAPP Information:

Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

Line of Evidence (LOE) for Decision ID 101179, Aldrin	Region 1
Russian River HU, Lower Russian River HA, Guerneville HSA

LOE ID:

40979

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP data for Russian River HU, Lower Russian River HA, Guerneville HSA to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Aldrin.

Data Reference:

RWB1 Trend Maintenance Periods FYs 2007 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric aldrin criterion maximum concentration to protect aquatic life in freshwater is 3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Russian River HU, Lower Russian River HA, Guerneville HSA was collected at 1 monitoring site [ Russian River at Johnson's Beach - 114RR1325]

Temporal Representation:

Data was collected over the time period 11/26/2007-7/14/2008.

Environmental Conditions:

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

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 101179, Aldrin	Region 1