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

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

The data was collected under the County of San Diego Ambient Bay and Lagoon Monitoring Project 2003-2005. Annual Report for the Receiving Waters and Urban Runoff Monitoring section covered under the San Diego County Municipal National Pollutant Discharge Elimination System (NPDES) Permit (RWQCB-Order NO. R9-2007-0001).

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86314, 2-Methylnaphthalene	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Five samples were collected to test for toxicity. One of the samples exhibited statistically significant toxicity. The toxicity tests included survival of Eohaustorius estuarius and percent normal of Mytilus galloprovincialis.

Data Reference:

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. Region 9 Basin Plan.

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86314, 2-Methylnaphthalene	Region 9
Los Penasquitos Lagoon

LOE ID:

78239

Pollutant:

2-Methylnaphthalene

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for 2-Methylnaphthalene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan for the San Diego Basin (SDRWQCB 2007): 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.

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for 2-Methylnaphthalene is 201.28 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	74102	Region 9
Los Penasquitos Lagoon

Pollutant:	Antimony
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 74102, Antimony	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 74102, Antimony	Region 9
Los Penasquitos Lagoon

LOE ID:

78240

Pollutant:

Antimony

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Antimony.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Antimony is 25 ug/g dry weight (Long and Morgan, 1990).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 74102, Antimony	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	86315	Region 9
Los Penasquitos Lagoon

Pollutant:	Arsenic
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86315, Arsenic	Region 9
Los Penasquitos Lagoon

LOE ID:

78241

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Arsenic.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Arsenic is 70 ug/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86315, Arsenic	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86315, Arsenic	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	96797	Region 9
Los Penasquitos Lagoon

Pollutant:	Benzo(a)anthracene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 96797, Benzo(a)anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

78242

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Benzo(a)anthracene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Benzo(a)anthracene is 692.53 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 96797, Benzo(a)anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 96797, Benzo(a)anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	86349	Region 9
Los Penasquitos Lagoon

Pollutant:	Cadmium (sediment)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86349, Cadmium (sediment)	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

Line of Evidence (LOE) for Decision ID 86349, Cadmium (sediment)	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86349, Cadmium (sediment)	Region 9
Los Penasquitos Lagoon

LOE ID:

78243

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Cadmium.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Cadmium is 4.21 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86350	Region 9
Los Penasquitos Lagoon

Pollutant:	Chlordane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86350, Chlordane	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86350, Chlordane	Region 9
Los Penasquitos Lagoon

LOE ID:

78244

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chlordane, Total.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

The potential for biological effects of sediment-sorbed contaminants tested in the National Status of Trends Program. NOAA Technical Memorandum NOS OMA 52. Seattle, WA: National Oceanic and Atmospheric Administration

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Total Chlordane is 6 ng/g dry weight (Long and Morgan, 1990).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86350, Chlordane	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):


DECISION ID	86351	Region 9
Los Penasquitos Lagoon

Pollutant:	Chromium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86351, Chromium	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

Line of Evidence (LOE) for Decision ID 86351, Chromium	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86351, Chromium	Region 9
Los Penasquitos Lagoon

LOE ID:

78245

Pollutant:

Chromium

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chromium.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Chromium is 370 ug/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	92869	Region 9
Los Penasquitos Lagoon

Pollutant:	Chrysene (C1-C4)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 92869, Chrysene (C1-C4)	Region 9
Los Penasquitos Lagoon

LOE ID:

78246

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chrysene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Chrysene is 845.98 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 92869, Chrysene (C1-C4)	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 92869, Chrysene (C1-C4)	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.


DECISION ID	86383	Region 9
Los Penasquitos Lagoon

Pollutant:	Copper
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86383, Copper	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86383, Copper	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86383, Copper	Region 9
Los Penasquitos Lagoon

LOE ID:

78247

Pollutant:

Copper

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Copper.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Copper is 270 ug/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86384	Region 9
Los Penasquitos Lagoon

Pollutant:	Dibenz[a,h]anthracene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86384, Dibenz[a,h]anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86384, Dibenz[a,h]anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86384, Dibenz[a,h]anthracene	Region 9
Los Penasquitos Lagoon

LOE ID:

78248

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Dibenzo(a, h)anthracene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Dibenzo(a, h)anthracene is 260 ng/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86385	Region 9
Los Penasquitos Lagoon

Pollutant:	Endrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86385, Endrin	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86385, Endrin	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86385, Endrin	Region 9
Los Penasquitos Lagoon

LOE ID:

78249

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: a total of 5 samples were collected and they were all non-detect, however 2 samples were not used in analysis because when the method detection limit was organic carbon normalized, the results were above the guideline and therefore could not be quanitified with the level of certainty required by the Listing Policy.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Technical basis for deriving sediment criteria for nonionic organic contaminants for the protection of benthic organisms by using equilibrium partitioning. EPA822-R-93-011. Washington, D.C.: Office of Water, USEPA

Evaluation Guideline:

In marine and estuarine sediments the sediment quality guideline (predictive of sediment toxicity for sediment-dwelling organisms) for Endrin is 0.76 ug/g oc (Fairey et al., 2001).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86692	Region 9
Los Penasquitos Lagoon

Pollutant:	Indicator Bacteria
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.2 of the Listing Policy. Under section 3.2, one line of evidence are necessary to assess listing status. Five lines of evidence are available in the administrative record to assess this pollutant. With data collected in 2008, zero of five single samples exceed the water quality objective for enterococcus for the protection of REC-1, one of five single samples exceed the water quality objective for total coliform of a SSM of 230/100ml for the protection of SHELL. 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. With data collected in 2008, zero of five single samples exceed the water quality objective for enterococcus for the protection of REC-1, one of five single samples exceed the water quality objective for total coliform of a SSM of 230/100ml for the protection of SHELL 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 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 4. Pursuant to [SECTION 3.11/4.11] of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not 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 86692, Indicator Bacteria	Region 9
Los Penasquitos Lagoon

LOE ID:

74184

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 County of San Diego data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Coliform, Fecal.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for water contact recreation (REC I), the fecal coliform concentration shall not exceed 400 MPN/100 ml.

Objective/Criterion Reference:

Quality Assurance Project Plan from Southern California Bight.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ Los Penasquitos Lagoon, Los Penasquitos Lagoon, Los Penasquitos Lagoon, Los Penasquitos Lagoon, Los Penasquitos Lagoon]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86692, Indicator Bacteria	Region 9
Los Penasquitos Lagoon

LOE ID:

74183

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed County of San Diego data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Coliform, Fecal.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for non contact recreation (REC 2), the fecal coliform concentration shall not exceed 4000 MPN/100 ml (Basin Plan).

Objective/Criterion Reference:

Quality Assurance Project Plan from Southern California Bight.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86692, Indicator Bacteria	Region 9
Los Penasquitos Lagoon

LOE ID:

74201

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed County of San Diego data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 1 of 5 samples exceed the criterion for Coliform, Total.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters where shellfish harvesting for human consumption, commercial or sports purposes is designated the total coliform concetration shall not exceed 230 per 100 ml (Basin Plan).

Objective/Criterion Reference:

Quality Assurance Project Plan from Southern California Bight.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86692, Indicator Bacteria	Region 9
Los Penasquitos Lagoon

LOE ID:

74212

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 County of San Diego data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Coliform, Total.

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for water contact recreation (REC I), the total coliform concentration shall not exceed 10000 MPN/100 ml (California Ocean Plan 2009).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86692, Indicator Bacteria	Region 9
Los Penasquitos Lagoon

LOE ID:

74182

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 County of San Diego data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Enterococci.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Samples shall not exceed 104 organisms per 100 ml for enterococcus in waters designated for REC I beneficial use (Water Quality Control Plan for the San Diego Basin).

Objective/Criterion Reference:

Quality Assurance Project Plan from Southern California Bight.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):


DECISION ID	100450	Region 9
Los Penasquitos Lagoon

Pollutant:	Lead
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 100450, Lead	Region 9
Los Penasquitos Lagoon

LOE ID:

78250

Pollutant:

Lead

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Lead.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Lead is 112.18 ug/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 100450, Lead	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

Line of Evidence (LOE) for Decision ID 100450, Lead	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):


DECISION ID	86415	Region 9
Los Penasquitos Lagoon

Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86415, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 9
Los Penasquitos Lagoon

LOE ID:

78251

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for HCH, Gamma.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

An evaluation of methods for calculating mean sediment quality guideline quotients as indicators of contamination and acute toxicity to amphipods by chemical mixtures. Environmental Toxicology and Chemistry. 20(10): 2276-2286

Evaluation Guideline:

In marine and estuarine sediments the sediment quality guideline (predictive of sediment toxicity for sediment-dwelling organisms) for HCH, gamma(Lindane; BHC, gamma) is 0.37 ug/g oc (Fairey et al., 2001).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86415, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86415, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	86416	Region 9
Los Penasquitos Lagoon

Pollutant:	Mercury
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86416, Mercury	Region 9
Los Penasquitos Lagoon

LOE ID:

78252

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Mercury.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Pollutants of concern in Puget Sound. EPA 910/9-91-003. Seattle, WA: U.S. Environmental Protection Agency

Evaluation Guideline:

In marine and estuarine sediments the sediment quality guideline (predictive of sediment toxicity for sediment-dwelling organisms) for Mercury is 2.1 ug/g (PTI Environmental Services, 1991).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86416, Mercury	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86416, Mercury	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	86417	Region 9
Los Penasquitos Lagoon

Pollutant:	PAHs (Polycyclic Aromatic Hydrocarbons) \| Toxicity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective for each type of PAHs. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86417, Multiple Pollutants	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

Line of Evidence (LOE) for Decision ID 86417, Multiple Pollutants	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86417, Multiple Pollutants	Region 9
Los Penasquitos Lagoon

LOE ID:

78253

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for PAH, High molecular weight.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for High molecular weight PAHs is 9600 ng/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86417, Multiple Pollutants	Region 9
Los Penasquitos Lagoon

LOE ID:

78254

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for PAH, Low molecular weight.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Low molecular weight PAHs is 1442 ng/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86417, Multiple Pollutants	Region 9
Los Penasquitos Lagoon

LOE ID:

78255

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for PAHs (Polycyclic Aromatic Hydrocarbons).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Quality Assurance Project Plan from Southern California Bight.

Evaluation Guideline:

In marine and estuarine sediments the sediment quality guideline (predictive of sediment toxicity for sediment-dwelling organisms) for Total PAHs is 1800 ug/g (Fairey et al., 2001).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):


DECISION ID	100465	Region 9
Los Penasquitos Lagoon

Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 100465, PCBs (Polychlorinated biphenyls)	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 100465, PCBs (Polychlorinated biphenyls)	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 100465, PCBs (Polychlorinated biphenyls)	Region 9
Los Penasquitos Lagoon

LOE ID:

78256

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for PCB, Total.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413

Evaluation Guideline:

In marine and estuarine sediments the sediment quality guideline (predictive of sediment toxicity for sediment-dwelling organisms) for Total PCBs is 400 ng/g (MacDonald et al., 2000b).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86451	Region 9
Los Penasquitos Lagoon

Pollutant:	Phenanthrene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86451, Phenanthrene	Region 9
Los Penasquitos Lagoon

LOE ID:

78257

Pollutant:

Phenanthrene

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Phenanthrene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Phenanthrene is 543.53 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86451, Phenanthrene	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86451, Phenanthrene	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.


DECISION ID	86452	Region 9
Los Penasquitos Lagoon

Pollutant:	Pyrene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86452, Pyrene	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86452, Pyrene	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86452, Pyrene	Region 9
Los Penasquitos Lagoon

LOE ID:

78258

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Pyrene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Pyrene is 1397.4 ng/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86453	Region 9
Los Penasquitos Lagoon

Pollutant:	Silver
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86453, Silver	Region 9
Los Penasquitos Lagoon

LOE ID:

78259

Pollutant:

Silver

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Silver.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Development and evaluation of sediment quality guidelines for Florida coastal waters. Ecotoxicology 5: 253-278

Evaluation Guideline:

In marine and estuarine sediments the probable effect level (predictive of sediment toxicity for sediment-dwelling organisms) for Silver is 1.77 ug/g dry weight (MacDonald et al., 1996).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.

Line of Evidence (LOE) for Decision ID 86453, Silver	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86453, Silver	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):


DECISION ID	86490	Region 9
Los Penasquitos Lagoon

Pollutant:	Zinc
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. Two lines of evidence are available in the administrative record to assess this pollutant. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality 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. Three of eight samples (sediment toxicity) and zero of five samples (sediment) exceeded the water quality objective. The level of toxicity in sediments indicates that the beneficial use is not fully supported. The applicable sediment quality standard for this pollutant is not being exceeded and is insufficient to determine use support. 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 though this water body is impaired for sediment toxicity, this water body-pollutant combination should not be placed on the section 303(d) list because applicable the water or sediment quality standards for these pollutants are not being exceeded or are insufficient to determine use support.

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 86490, Zinc	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

Line of Evidence (LOE) for Decision ID 86490, Zinc	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86490, Zinc	Region 9
Los Penasquitos Lagoon

LOE ID:

78260

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Bight data for Los Penasquitos Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Zinc.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuary sediments. Environmental Management. 19, (1): 81-97

Evaluation Guideline:

In marine and estuarine sediments the effects range median (predictive of sediment toxicity for sediment-dwelling organisms) for Zinc is 410 ug/g dry weight (Long et al., 1995).

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Los Penasquitos Lagoon was collected at 5 monitoring sites [ 906_6228, 906_6229, 906_6230, 906_6232, 906_6236]

Temporal Representation:

Data was collected on a single day 7/17/2008.

Environmental Conditions:

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

QAPP Information:

The Quality Assurance Project Plan from Southern California Bight was followed.

QAPP Information Reference(s):

Quality Assurance Project Plan from Southern California Bight.


DECISION ID	86491	Region 9
Los Penasquitos Lagoon

Pollutant:	Toxicity
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2027
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 3.6 of the Listing Policy. Under section 3.6 at least one line of evidence is necessary to assess listing status for toxicity in sediment, and waters may be placed on the CWA section 303(d) List for toxicity alone. Two lines of evidence are available in the administrative record to assess sediment toxicity. Three of the eight samples exhibited sediment toxicity. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of 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. Three of the eight samples exhibited sediment toxicity, and this exceeds 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

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 86491, Toxicity	Region 9
Los Penasquitos Lagoon

LOE ID:

74213

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Data for Various Pollutants from Ambient Bay and Lagoon, 2003-2005.

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

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 906LPL_2003, 906LPL_2004, and 906LPL_2005. Each of these sample location names consists of a composite from three different sites.

Temporal Representation:

The samples were collected in 2003, 2004, and 2005.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 86491, Toxicity	Region 9
Los Penasquitos Lagoon

LOE ID:

74214

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Methods for Assessing the Toxicity of Sediment-associated Contaminants with Estuarine and Marine Amphipods. June 1994. EPA 600/R-94/025

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected from sites 906_6228, 906_6229, 906_6230, 906_6232, 906_6236 Los Penasquitos Lagoon.

Temporal Representation:

The samples were collected in July 2008.

Environmental Conditions:

QAPP Information:

This data was collected under the Southern California Bight 2008 Regional Marine Monitoring Survey Quality Assurance Plan.

QAPP Information Reference(s):