Final California 2010 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name:	Elsinore, Lake
Water Body ID:	CAL8023100019990208151100
Water Body Type:	Lake & Reservoir


DECISION ID	7224	Region 8
Elsinore, Lake

Pollutant:	Unknown Toxicity
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2006)
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2007
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Five lines of evidence are available in the administrative record to assess pollutant. Sixteen of the 30 samples exhibited toxicity to test organisms. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the 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. Sixteen of 30 samples exhibited toxicity to test organisms and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 7224, Unknown Toxicity	Region 8
Elsinore, Lake

LOE ID:

8438

Pollutant:

Ambient Bioassays -- Chronic Aquatic Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Ambient toxicity testing (chronic)

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the wet season, 3 of the 30 stations showed <80% Selenastrum capricornatum (algae) growth and reproduction (sublethal chronic effects) in the water column

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Sediment chemistry, toxicity, and benthic community conditions in selected water bodies of the Los Angeles Region - Final Report and Appendices. Sacramento, CA: Bay Protection and Toxic Cleanup Program

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

Each of the 30 stations were sampled once during the wet season in April 2003.

Environmental Conditions:

The samples represent the wet season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

Line of Evidence (LOE) for Decision ID 7224, Unknown Toxicity	Region 8
Elsinore, Lake

LOE ID:

8441

Pollutant:

Ambient Bioassays -- Acute Aquatic Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Ambient toxicity testing (acute)

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the wet season, 1 of the 30 stations showed <80% Ceriodaphnia dubia (water flea) survival (acute effects) in the water column

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

Each of the 30 stations were sampled once during the wet season in April 2003.

Environmental Conditions:

The samples represent the wet season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

Line of Evidence (LOE) for Decision ID 7224, Unknown Toxicity	Region 8
Elsinore, Lake

LOE ID:

8416

Pollutant:

Ambient Bioassays -- Acute Aquatic Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Ambient toxicity testing (acute)

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the dry season, 9 of the 30 stations showed <80% Cerodaphnia dubia survival (acute effects) in the water column

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

Each of the 30 stations were sampled once during the dry season in June and October 2003.

Environmental Conditions:

The samples represent the dry season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

Line of Evidence (LOE) for Decision ID 7224, Unknown Toxicity	Region 8
Elsinore, Lake

LOE ID:

8427

Pollutant:

Ambient Bioassays -- Chronic Aquatic Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Ambient toxicity testing (chronic)

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the dry season, 1 of the 30 stations showed <80% Selenastrum capricornatum (algae) growth and reproduction (sublethal chronic effects) in the water column

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

Each of the 30 stations were sampled once during the dry season in June and October 2003.

Environmental Conditions:

The samples represent the dry season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

Line of Evidence (LOE) for Decision ID 7224, Unknown Toxicity	Region 8
Elsinore, Lake

LOE ID:

8420

Pollutant:

Ambient Bioassays -- Chronic Aquatic Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Ambient toxicity testing (chronic)

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the dry season, 16 of the 30 stations showed <80% Ceriodaphnia dubia (water flea) growth and reproduction (sublethal effects) in the water column

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

Each of the 30 stations were sampled once during the dry season in June and October 2003.

Environmental Conditions:

The samples represent the dry season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.


DECISION ID	17969	Region 8
Elsinore, Lake

Pollutant:	Mercury
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed 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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 24 samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	N/A

State Board Review of Regional Board Conclusion and Recommendation:

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

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 17969, Mercury	Region 8
Elsinore, Lake

LOE ID:

31113

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Fish were collected for tissue analysis at two locations from Lake Mathews. A total of 24 sample composites were generated from two species: Largemounth Bass (22) and Common Carp (2). Details of the compositing protocol can be found in the March 2009 report entitled: "Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Study" (SWAMP, 2009). A total of 0 out of 24 samples exceeded the OHHEA fish tissue screening value for human health.

Data Reference:

Data associated with report entitled: Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Survey. A Report of the Surface Water Ambient Monitoring Program (SWAMP). California State Water Resources Control Board, Sacramento, CA

Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Survey. A Report of the Surface Water Ambient Monitoring Program (SWAMP). California State Water Resources Control Board, Sacramento, CA

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Santa Ana Region Basin Plan Objective: All waters of the region shall be maintained free of substances in concentrations which are toxic, or that produce detrimental physiological responses in human, plant, animal
or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 0.3 mg/kg to protect human health when consuming fish (OEHHA, 1999).

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Spatial Representation:

Samples were collected from two locations in Lake Elsinore. As discussed in the Lakes and Reservoirs Report (SWAMP, 2009), individual sample locations consisted of an area within a given waterbody with an approximate one-mile diameter, from which multiple fish tissue samples were collected. The number of sample locations per waterbody was based on the overall size of the waterbody. Specifics of individual sampling locations can be found in the supplemental report entitled "Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008" (SWAMP, 2008).

Temporal Representation:

Samples were collected on 8/22/07

Environmental Conditions:

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

QAPP Information:

Samples were collected, processed, and analyzed in accordance with the methods described in "Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs." (SWAMP, 2008).

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	15607	Region 8
Elsinore, Lake

Pollutant:	Sediment Toxicity
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Thirty-nine (39) of the samples exceed the water quality objective. 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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Thirty-nine (39) of sixty (60) samples exceed the survival of organisms during toxicity bioassays no less than 80% 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 the available data and information, SWRCB 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 toxicity is observed.

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 15607, Sediment Toxicity	Region 8
Elsinore, Lake

LOE ID:

8397

Pollutant:

Sediment Bioassays -- Acute Toxicity--Freshwater

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Toxicity testing of sediments

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study that was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the wet season, 27 of the 30 stations showed <80% Hyallela azteca survival in the sediment.

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

The 30 stations were sampled once during the wet season in April 2003.

Environmental Conditions:

The samples represent the wet season.

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

Line of Evidence (LOE) for Decision ID 15607, Sediment Toxicity	Region 8
Elsinore, Lake

LOE ID:

8407

Pollutant:

Sediment Bioassays -- Acute Toxicity--Freshwater

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Toxicity testing of sediments

Data Used to Assess Water Quality:

The data used for this assessment originated from the Regional Board's monitoring study fthat was funded by the State's Surface Water Ambient Monitoring Program. The wet and dry season samples were collected at 30 locations. During the dry season, 12 of the 30 stations showed <80% Hyallela azteca survival in the sediment.

Data Reference:

Lake Elsinore Sediment and Water Column Toxicity Study, and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Basin Plan Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan for the Santa Ana River Basin

Evaluation Guideline:

Survival of organisms during toxicity bioassays no less than 80%

Guideline Reference:

Spatial Representation:

Thirty locations were randomly selected by a statistician over the entire lake.

Temporal Representation:

The 30 stations were sampled once during the dry season in June and October 2003.

Environmental Conditions:

The samples represent the dry season

QAPP Information:

The data's quality is considered to be appropriate because it was generated under the auspices of an approved Quality Assurance Plan.

QAPP Information Reference(s):

Lake Elsinore Sediment and Water Column Toxicity Study, and data.


DECISION ID	6899	Region 8
Elsinore, Lake

Pollutant:	Sedimentation/Siltation
Final Listing Decision:	Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Delist from 303(d) list (TMDL required list)(2006)
Revision Status	Original
Reason for Delisting:	Other
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the section 303(d) list under section 4 of the Listing Policy. The Policy calls for the delisting of waters if the decision is found to be faulty and it is demonstrated that the listing would not have occurred in the absence of such faulty data. One testimonial line of evidence is available in the administrative record to assess this pollutant. The original listing was based on the assumption that nutrient impacts were associated with increases of sediment rates but recent nutrient TMDL implementation have shown that all nutrients are in the dissolved form and thus not associated with sediment inputs Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this listing from the water quality limited segment list for this water body pollutant combination. This conclusion is based on the findings that the original listing assumption cannot be made and therefore listing is faulty. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	No new data were assessed for 2008. The decision has not changed.

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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 6899, Sedimentation/Siltation	Region 8
Elsinore, Lake

LOE ID:

765

Pollutant:

Sedimentation/Siltation

LOE Subgroup:

Testimonial Evidence

Matrix:

Not Specified

Fraction:

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Lake Elsinore was originally placed in the 303(d) list by the Regional Board for sedimentation and siltation because it was believed that since the lake is impacted by nutrients the impact were associated with increases of sediment rates to the lake. However, during recent lake nutrient TMDL implementation it was found that the all the nutrients were in the dissolved form and are thus not associated with sediments. Increased sediment rates have been documented in a recent study (3.6 mm/yr from 18th and 19th century and 12.7 mm/yr in the 20th century) but there is no evidence to support that beneficial uses are impacted as a result of this increase. The Regional Board staff believes that the original listing was faulty and the water body pollutant combination should be removed from the 303(d) list.

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Inland surface waters shall not contain suspended or settleable solids in amounts which causes a nuisance or adversely affect beneficial uses.

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

QAPP Information:

QA Info Missing

QAPP Information Reference(s):


DECISION ID	5365	Region 8
Elsinore, Lake

Pollutant:	PCBs (Polychlorinated biphenyls)
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)(2006)
Revision Status	Original
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. One line of evidence is available in the administrative record to assess this pollutant. 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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Five of the 6 samples exceeded the OEHHA Screening Value 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:	No new data were assessed for 2008. The decision has not changed.

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.

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 5365, PCBs (Polychlorinated biphenyls)	Region 8
Elsinore, Lake

LOE ID:

764

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Five out of 6 samples exceeded. A total of 6 filet composite samples of carp were collected. Carp were collected in 1994-95 and 2000-2002. The guideline was exceeded in every sample except in 1994 (TSMP, 2002).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana River Basin RWQCB Basin Plan: Toxic substances shall not be discharged at levels that will bioaccumulate in aquatic resources to levels which are harmful to human health.

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

20 ng/g (OEHHA Screening Value).

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

One station located west of Interstate 15.

Temporal Representation:

Samples were collected annually 1994-95 and 2000-02

Environmental Conditions:

QAPP Information:

Toxic Substances Monitoring Program 1994-95 Data Report.

Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 1996-2000. Department of Fish and Game

Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game.

QAPP Information Reference(s):


DECISION ID	6844	Region 8
Elsinore, Lake

Pollutant:	Nutrients
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2006)
Revision Status	Original
Sources:	Unknown Nonpoint Source
TMDL Name:	Lake Elsinore Watershed Nutrient TMDL
TMDL Project Code:	120
Date TMDL Approved by USEPA:	09/30/2005
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status. The Lake Elsinore Nutrients TMDL was approved by the RWQCB in December 20, 2004 and subsequently approved by USEPA on September 30, 2005. 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 in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list.

Regional Board Decision Recommendation:	No new data were assessed for 2008. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information for this recommendation, SWRCB staff conclude that the water body should be placed in the Water Quality Limited Segments Being Addressed category of the section 303(d) list because a TMDL has been approved by USEPA and an implementation plan has been approved.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 6844, Nutrients	Region 8
Elsinore, Lake

LOE ID:

766

Pollutant:

Nutrients

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

QAPP Information:

QA Info Missing

QAPP Information Reference(s):


DECISION ID	6845	Region 8
Elsinore, Lake

Pollutant:	Organic Enrichment/Low Dissolved Oxygen
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2006)
Revision Status	Original
Sources:	Unknown Nonpoint Source
TMDL Name:	Lake Elsinore Watershed Nutrient TMDL
TMDL Project Code:	120
Date TMDL Approved by USEPA:	09/30/2005
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status. The Lake Elsinore Nutrients TMDL was adopted by the RWQCB on December 20, 2004 and subsequently approved by USEPA on September 30, 2005. 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 in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list.

Regional Board Decision Recommendation:	No new data were assessed for 2008. The decision has not changed.

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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 6845, Organic Enrichment/Low Dissolved Oxygen	Region 8
Elsinore, Lake

LOE ID:

767

Pollutant:

Organic Enrichment/Low Dissolved Oxygen

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

QAPP Information:

QA Info Missing

QAPP Information Reference(s):