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

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name:	Newport Slough
Water Body ID:	CAR8011100020011107123409
Water Body Type:	River & Stream


DECISION ID	95778	Region 8
Newport Slough

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	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2021
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 4.2 of the Listing Policy. Under section 4.2 a single line of evidence is necessary to assess listing status. Fifteen (15) lines of evidence are available in the administrative record to assess this pollutant. One hundred and Twenty Four (124) of 306 samples exceed the Enterococcus Geomean Objective. Four (4) of 51 samples exceed the Enterococcus Single Sample Objective. Thirty Two (32) of 298 samples exceed the Fecal Coliform Geomean Objective. Zero (0) of 51 samples exceed the Fecal Coliform Single Sample Objective. Thirty One (31) of 291 samples exceed the Total Coliform Geomean Objective. One (1) of 20 samples exceed the Total Coliform Single Sample Objective. 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 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. One hundred and Twenty Four (124) of the 306 samples exceed the Enterococcus Geomean Objective, 32 of the 298 samples exceed the Fecal Coliform Geomean Objective, 31 of the 291 samples exceed the Total Coliform Geomean, and the Enterococcus Geomean exceedances exceed the frequency listed in table 4.2 4. Four (4) of the 51 samples exceed the Enterococcus Single Sample Objective, Zero (0) of the 51 samples exceed the Fecal Coliform Single Sample Objective, One (1) of the 20 samples exceed the Total Coliform Single Sample, and this does not exceed the frequency listed in table 4.2 5. 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26099

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

146

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 146 samples collected, 68 exceeded the following criteria, or guidelines as stated in the Ocean Plan: Enterococcus <35MPN/100mL

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

As stated in the California Ocean Plan, under the SWRCB Water-Contact Standards using a 30d geometric mean maximum, within a zone bounded by the shoreline and a distance of 1,000 feet from the shoreline or the 30-foot depth contour, whichever is further from the shoreline, and in areas outside this zone used for water contact sports, as determined by the Regional Board (i.e., waters designated as REC-1), but including all kelp* beds, the following bacterial objectives shall be maintained throughout the water column: Enterococcus density shall not exceed 35 per 100 ml

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 146 samples were collected at the Lancaster/62nd station located in Newport Beach.

Temporal Representation:

The 146 samples were collected weekly between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

Data was collected by the Orange County Environmental Health Agency and provided to the Regional Board by the State Water Resources Control Board for the sole purpose of the water quality assessment and update of the 2008 303d list. The EPA Method/Analytical Detection Limit used was EPA_1600.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81967

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:

Not Specified

Data Used to Assess Water Quality:

Four of the 15 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for enterococcus states that the density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at LANCASTER/62ND.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81965

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:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Newport Slough to determine beneficial use support and results are as follows: 4 of 51 samples exceed the criterion for Enterococci.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2009) single sample maximum states that enterococcus density shall not exceed 104 per 100 mL.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Newport Slough was collected at 2 monitoring sites [ LANCASTER/62ND, GRANT STREET]

Temporal Representation:

Data was collected over the time period 1/14/2009-10/30/2009.

Environmental Conditions:

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

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26098

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

127

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 127 samples collected, 14 exceed the following criteria, or guidelines as stated in the Ocean Plan: Total Coliform <1000MN/100mL i

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

As stated in the California Ocean Plan, under the SWRCB Water-Contact Standards using a 30d geometric mean maximum, within a zone bounded by the shoreline and a distance of 1,000 feet from the shoreline or the 30-foot depth contour, whichever is further from the shoreline, and in areas outside this zone used for water contact sports, as determined by the Regional Board (i.e., waters designated as REC-1), but including all kelp* beds, the following bacterial objectives shall be maintained throughout the water column: Total Coliform density shall not exceed 10,000 per 100 ml and Total Coliform density shall not exceed 1,000 per 100 ml when the Fecal Coliform/Total Coliform ratio exceeds 0.1

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 127 samples were collected at the Grant Street station located in Newport Beach.

Temporal Representation:

The 96 samples were collected weekly between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81970

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Zero of the 15 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for fecal coliform states that the coliform density shall not exceed 400 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at LANCASTER/62ND.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26101

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

136

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 136 samples collected, 17 exceeded the standards/guidelines listed above.

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

As stated in the California Ocean Plan, under the SWRCB Water-Contact Standards using a 30d geometric mean maximum, within a zone bounded by the shoreline and a distance of 1,000 feet from the shoreline or the 30-foot depth contour, whichever is further from the shoreline, and in areas outside this zone used for water contact sports, as determined by the Regional Board (i.e., waters designated as REC-1), but including all kelp* beds, the following bacterial objectives shall be maintained throughout the water column: Total Coliform density shall not exceed 1,000 per 100 ml

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 136 samples were collected at the Lancaster/62nd station located in Newport Beach.

Temporal Representation:

The 136 samples were collected between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81973

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Zero of the 15 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at LANCASTER/62ND.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81972

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Zero of the 13 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at GRANT STREET.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81971

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Newport Slough to determine beneficial use support and results are as follows: 1 of 50 samples exceed the criterion for Coliform, Total.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (2009) single sample maximum states that total coliform density shall not exceed 10,000 per 100 mL

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Newport Slough was collected at 2 monitoring sites [ LANCASTER/62ND, GRANT STREET]

Temporal Representation:

Data was collected over the time period 1/14/2009-10/30/2009.

Environmental Conditions:

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

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81969

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Zero of the 14 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for fecal coliform states that the coliform density shall not exceed 400 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at GRANT STREET.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26096

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

131

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 131 samples collected, 56 exceeded the standards/guidelines listed above.

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 131 samples were collected at the Grant Street station located in Newport Beach.

Temporal Representation:

The 131 samples were collected weekly between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81966

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:

Not Specified

Data Used to Assess Water Quality:

Four of the 14 geomeans exceeded the objective.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The standard for enterococcus states that the density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at GRANT STREET.

Temporal Representation:

Samples were collected approximately twice a month from February 2009 to January 2010 and once in August 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the beach watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

81968

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Newport Slough to determine beneficial use support and results are as follows: 0 of 51 samples exceed the criterion for Coliform, Fecal.

Data Reference:

Data for Region 8 Beach Watch.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2009) single sample maximum states that fecal coliform density shall not exceed 400 per 100ml

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Newport Slough was collected at 2 monitoring sites [ LANCASTER/62ND, GRANT STREET]

Temporal Representation:

Data was collected over the time period 1/14/2009-10/30/2009.

Environmental Conditions:

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

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26100

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

143

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 143 samples collected, 18 exceed the standards/guidelines listed above.

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

As stated in the California Ocean Plan, under the SWRCB Water-Contact Standards using a 30d geometric mean maximum, within a zone bounded by the shoreline and a distance of 1,000 feet from the shoreline or the 30-foot depth contour, whichever is further from the shoreline, and in areas outside this zone used for water contact sports, as determined by the Regional Board (i.e., waters designated as REC-1), but including all kelp* beds, the following bacterial objectives shall be maintained throughout the water column: Fecal Coliform density shall not exceed 200 per 100ml

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 143 samples were collected at the Lancaster/62nd station located in Newport Beach.

Temporal Representation:

The 143 samples were collected weekly between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95778, Indicator Bacteria	Region 8
Newport Slough

LOE ID:

26097

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

126

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Of the 126 samples collected, 14 exceed the following criteria, or guidelines as stated in the Ocean Plan: Fecal Coliform <200MPN/100mL

Data Reference:

Bacteria data for Orange County beaches downloaded from Orange County Health Care website.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

As stated in the California Ocean Plan, under the SWRCB Water-Contact Standards using a 30d geometric mean maximum, within a zone bounded by the shoreline and a distance of 1,000 feet from the shoreline or the 30-foot depth contour, whichever is further from the shoreline, and in areas outside this zone used for water contact sports, as determined by the Regional Board (i.e., waters designated as REC-1), but including all kelp* beds, the following bacterial objectives shall be maintained throughout the water column: Fecal Coliform density shall not exceed 200 per 100ml

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The 126 samples were collected at the Grant Street station located in Newport Beach.

Temporal Representation:

The 126 samples were collected between April 2004 and December 2006

Environmental Conditions:

The data spanned 3 entire years including wet and dry seasons.

QAPP Information:

QAPP Information Reference(s):