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

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Santa Monica Bay Offshore/Nearshore
Water Body ID:	CAB4051300019990921164318
Water Body Type:	Bay & Harbor


DECISION ID	71756	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Chlordane
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)(2016)
Revision Status	Original
Reason for Delisting:	Applicable WQS attained; reason for recovery unspecified
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. 4 lines of evidence are available in the administrative record to assess this pollutant. 4 of the 339 samples exceeded the CRITERIA. 0 of the 425 samples exceeded the CRITERIA. 0 of the 0 samples exceeded the CRITERIA. In addition, 5 of 23 samples showed biodiversity impacts. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 4 of 339, 0 of 425 and 0 of 0 samples exceeded the CRITERIA and this does not exceed 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 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 removed from the section 303(d) list because applicable water quality standards for the pollutant 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 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

174

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Chemical monitoring of sediments

Data Used to Assess Water Quality:

Data generated from 23 samples different stations in Santa Monica Bay using SQGs to assess toxic effects due to total chlordane. No sample exceeded the total chlordane SQG (LACSD, 2004b).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

LARWQCB Basin Plan 1994: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increases in pesticide concentrations found in bottom sediments or aquatic life.

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Sediment Quality Guidelines (SQGs) are used to determine the toxic effects of a sample, concurrently collected measurements of chemical concentrations can be used to associate toxic effects with toxicity or other biological effects. The predictability of toxicity, using the SQGs values reported (Long et al., 1998) is reasonably good and is most useful if accompanied by data from biological analyses, toxicological analyses, and other interpretative tools. The SQG for total chlordane is 6 ug/kg.

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Twenty-three sample sites were sampled within Santa Monica Bay at different dates during 1998.

Temporal Representation:

Twenty-three samples were taken from twenty-three different sampling stations within the Santa Monica Bay during 1998.

Environmental Conditions:

QAPP Information:

Quality Assurance Document of the County Sanitation Districts Of Los Angeles County, July 2003.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

175

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

284

Number of Exceedances:

Data and Information Type:

Chemical monitoring of sediments

Data Used to Assess Water Quality:

Four of 284 sediment samples exceeded guidelines. Collection procedures were consistent with approaches described by NOAA CPRD Standardized Sums and SCCWRP Chemistry Datasets Imputation Summation Procedures (USEPA, 2006).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Data was collected at two sites: Palos Verdes Shelf and Hyperion Waste Water Treatment Plant.

Temporal Representation:

Data was collected between 1998 and 2004.

Environmental Conditions:

QAPP Information:

Quality Assurance Document Of The County Sanitation Districts Of Los Angeles County, July 2003.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

173

Pollutant:

Biodiversity impacts

LOE Subgroup:

Population/Community Degradation

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Benthic macroinvertebrate surveys

Data Used to Assess Water Quality:

Data generated from 23 samples within different stations in Santa Monica Bay using the BRI to assess benthic conditions indicate that 5 samples marginally deviate from reference conditions (LACSD, 2004b).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Benthic Response Index (BRI) is a guidance developed by SCCWRP based on changes in biodiversity along a pollutant gradient that is defined by the index values. The index points define specific percentages where the biodiversity of the reference pool is lost. The BRI defines the abundance weighted pollution tolerance of the species present at a site and ranges from Response level RL 1 through 4. RL1 indicates marginal deviations from reference conditions (REF), while RL 2 through 4 are considered evidence of disturbed benthic conditions.

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Twenty-three sample sites within Santa Monica Bay at different dates in 1998.

Temporal Representation:

Twenty-three samples taken during 1998 at 23 different sampling stations.

Environmental Conditions:

QAPP Information:

Southern California Bight 1998 Regional Marine Monitoring Survey (Bight, 1998) Quality Assurance Manual (CSCCWRP Bight 1998 Steering Committee. July, 1998)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88882

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Toxic pollutants shall not be present at levels that will bioaccumulate in aquatic life to levels which are harmful to aquatic life or human health. No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for chlordane (as total) is 6 ug/kg dry weight (Fairey, R., E.R. Long, C.A. Roberts, B.S. Anderson, B.M. Phillips, J.W. Hunt, H.R. Puckett and C.J. Wilson. 2001.).

Guideline Reference:

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

Spatial Representation:

Receiving water (RW) samples were collected at stations: A-1, A-2, A-3, B-1, B-3, B-5, B-6, B-7, B-8, B-10, Z-1, Z-2, C-1, C-3, C-5, C-6, C-7, C-8, C-9A, D-1, E-1, E-3, E-6, E-10, NA-1, NA-3, NA-3, NA-4, NA-5, NA-6, FA-7, FA-8, FA-9, FA-10, FA-11, FA-12, FA-13, FA-14, FA-15, FA-16, FA-17, FA-18, FA-19, FA-20, NB-1, NB-2, NB-3, NB-4, NB-5, NB-6, NB-7, NB-8, FB-9, FB-10, FB-11, FB-12, FB-13, FB-14, FB-15, FB-16, FB-17, FB-18, FB-19, and FB-20.

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

176

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

425

Number of Exceedances:

Data and Information Type:

Fish surveys

Data Used to Assess Water Quality:

None of 425 tissue samples exceeded guidelines. Collection procedures were consistent with approaches described by NOAA CPRD Standardized Sums and SCCWRP Chemistry Datasets Imputation Summation Procedures (USEPA, 2006).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

OEHHA screening value for chlordane: 30 ug/kg.

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Samples were collected at four sites: Santa Monica Pier, Venice Pier, Party Boat to Malibu Kelp Beds, and Hyperion Waste Water Treatment Plant.

Temporal Representation:

Samples were collected between 1999 and 2004.

Environmental Conditions:

QAPP Information:

Quality Assurance Document Of The County Sanitation Districts Of Los Angeles County July 2003

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71756, Chlordane	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	68470	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	PAHs (Polycyclic Aromatic Hydrocarbons)
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)(2016)
Revision Status	Original
Reason for Delisting:	Applicable WQS attained; reason for recovery unspecified
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. 3 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 324 samples exceeded the CRITERIA. 0 of the 0 samples exceeded the CRITERIA. In addition, 5 of 23 samples showed biodiversity impacts. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 324 and 0 of 0 samples exceeded the CRITERIA and this does not exceed 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 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 removed from the section 303(d) list because applicable water quality standards for the pollutant 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 68470, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68470, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

177

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Chemical monitoring of sediments

Data Used to Assess Water Quality:

Data generated from 23 samples at different stations in Santa Monica Bay using SQGs to assess toxic effects due total PAHs. No sample exceeded the total PAHs SQG for the protection of marine aquatic life (LACSD, 2004b).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

LARWQCB Basin Plan 1994: 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:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Sediment Quality Guideline for total PAHs is 1800 ug/g (Fairey et al., 2001).

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Twenty-three sample sites were sampled within Santa Monica Bay at different dates during 1998.

Temporal Representation:

Twenty-three samples where taken from 5/7/02 through 5/4/04 at quarterly intervals from three sampling stations (R1, R2, and R5).

Environmental Conditions:

QAPP Information:

Quality Assurance Document of the County Sanitation Districts Of Los Angeles County, July 2003.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68470, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88897

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the evaluation guideline.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects rance median (predictive of sediment toxicity) for the total polynuclear aromatic hydrocarbons is 44.8 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68470, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

173

Pollutant:

Biodiversity impacts

LOE Subgroup:

Population/Community Degradation

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Benthic macroinvertebrate surveys

Data Used to Assess Water Quality:

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Twenty-three sample sites within Santa Monica Bay at different dates in 1998.

Temporal Representation:

Twenty-three samples taken during 1998 at 23 different sampling stations.

Environmental Conditions:

QAPP Information:

Southern California Bight 1998 Regional Marine Monitoring Survey (Bight, 1998) Quality Assurance Manual (CSCCWRP Bight 1998 Steering Committee. July, 1998)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68470, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

178

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

269

Number of Exceedances:

Data and Information Type:

Chemical monitoring of sediments

Data Used to Assess Water Quality:

None of the 269 samples exceeded the sediment quality guideline (LARWQCB & CCC, 2004).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Sediment Quality Guideline for total PAHs is 1800 ug/g (Fairey et al., 2001).

Guideline Reference:

Placeholder reference 2006 303(d)

Spatial Representation:

Samples taken in Santa Monica Bay offshore/nearshore.

Temporal Representation:

Samples taken between 1980 and 2001. Most of these samples were taken after the year 1997.

Environmental Conditions:

QAPP Information:

QA Info Missing

QAPP Information Reference(s):


DECISION ID	68867	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Toxicity
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)(2016)
Revision Status	Original
Reason for Delisting:	Applicable WQS attained; reason for recovery unspecified
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	303(d) listing decisions made prior to 2006 were not held in an assessment database. However, a USEPA made a finding of non-impairment for sediment toxicity in the Santa Monica Bay TMDL for DDT and PCBs in March 26,2012. "Our evaluation of the data showed only 3 out of 116 samples exhibited toxicity. Following the California listing policy, Santa Monica Bay is meeting the toxicity objective and there is sufficient evidence to delis! sediment toxicity. We therefore make a finding that there is no significant toxicity in Santa Monica Bay and recommend that Santa Monica Bay not be identified as impaired by toxicity in the California's next 303(d) list."

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant 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 68867, Toxicity	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	99728	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Name:	Santa Monica Bay Historic Pesticides (58)
TMDL Project Code:	397
Date TMDL Approved by USEPA:	03/26/2012
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.5 of the Listing Policy. Under section 4.5 a single line of evidence is necessary to assess listing status. 5 lines of evidence are available in the administrative record to assess pollutant. 12 of 19 samples exceeded the GUIDELINE. 17 of 32 samples exceeded the GUIDELINE. 0 of 0 sample exceeded the GUIDELINE. 0 of 0 sample exceeded the GUIDELINE. 0 of 0 sample exceeded the GUIDELINE. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 12 of 19, 17 of 32, 0 of 0, 0 of 0 and 0 of 0 samples exceeded the GUIDELINE 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. There is sufficient justification to place waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The Santa Monica Bay DDT and PCB TMDL was approved by USEPA on 03/26/2012.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 99728, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88888

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Seventeen of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for Total DDTs is 46.1 ug/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99728, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4164

Pollutant:

Fish Consumption Advisory

LOE Subgroup:

Health Advisories

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Placeholder reference pre-2006 303(d)

Evaluation Guideline:

Unspecified

Guideline Reference:

Placeholder reference pre-2006 303(d)

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99728, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99728, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88889

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

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:

Non-fixed station physical/chemical (conventional + toxicants)

Data Used to Assess Water Quality:

Twelve of nineteen samples exceeded the evaluation guideline. No liver tissue were used in this assessment. All concentrations reported were presumed to be reported on a wet weight basis as that is standard for reporting tissue data. The total DDTs were calculated as the sum of 4,4- and 2,4- isomers of DDT, DDE, and DDD). Non-detect results were not used in the sum calculations.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Toxic pollutants shall not be present at levels that will bioaccumulate in aquatic life to levels which are harmful to aquatic life or human health. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for total DDT in fish tissue is 15 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets (Klasing, S., and R. Brodberg, 2008).

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Samples were collected from nearfield and from Zones 4 & 5. Both rig fishing and trawl fishing sampling techniques were deployed.

Temporal Representation:

Samples were taken in August of 2006, October and November of 2007, and August - September of 2007.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99728, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4162

Pollutant:

DDT (tissue & sediment)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Placeholder reference pre-2006 303(d)

Evaluation Guideline:

Unspecified

Guideline Reference:

Placeholder reference pre-2006 303(d)

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	68362	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Name:	Santa Monica Bay Historic Pesticides (58)
TMDL Project Code:	397
Date TMDL Approved by USEPA:	03/26/2012
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.5 of the Listing Policy. Under section 4.5 a single line of evidence is necessary to assess listing status. 4 lines of evidence are available in the administrative record to assess pollutant. 0 of 0 samples exceeded the GUIDELINE. 9 of 19 samples exceeded the GUIDELINE. 21 of 21 samples exceeded the GUIDELINE. 6 of 7 samples exceeded the GUIDELINE. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 0, 9 of 19, 21 of 21 and 6 of 7 samples exceeded the GUIDELINE 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. There is sufficient justification to place waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The Santa Monica Bay DDT and PCB TMDL was approved by USEPA on 03/26/2012.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 68362, PCBs (Polychlorinated biphenyls)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4164

Pollutant:

Fish Consumption Advisory

LOE Subgroup:

Health Advisories

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Placeholder reference pre-2006 303(d)

Evaluation Guideline:

Unspecified

Guideline Reference:

Placeholder reference pre-2006 303(d)

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68362, PCBs (Polychlorinated biphenyls)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88902

Pollutant:

PCBs (Polychlorinated biphenyls)

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:

Non-fixed station physical/chemical (conventional + toxicants)

Data Used to Assess Water Quality:

Nine of nineteen samples exceeded the evaluation guideline. No liver tissue were used in this assessment. All concentrations reported were presumed to be reported on a wet weight basis as that is standard for reporting tissue data. The total PCBs were calculated from the following mixture of Arochlors: 1016, 1221, 1232, 1242, 1248, 1254, 1260, not from the PCB conginers. Non-detect results were not used in the sum calculations.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The OEHHA fish contaminant goal is 3.65 ppb wet weight. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is setto one in a million. (OEHHA 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Samples were collected from nearfield and from Zones 4 & 5. Both rig fishing and trawl fishing sampling techniques were deployed.

Temporal Representation:

Samples were taken in August of 2006, October and November of 2007, and August - September of 2007.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68362, PCBs (Polychlorinated biphenyls)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

179

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:

Six out of 7 samples exceeded. All 7 samples were filet composites representing the following species: barred surfperch, California corbina, queenfish, walleye surfperch, and white croaker. All but one of two California corbina exceeded guideline. (TSMP, 2002).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Los Angeles RWQCB Basin Plan: Toxic pollutants shall not be present at levels that will bioaccumulate in aquatic life to levels which are harmful to aquatic life or 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:

Two stations were sampled: Santa Monica Pier and Venice Pier.

Temporal Representation:

Samples were collected in July and November 1999.

Environmental Conditions:

QAPP Information:

CFCP 1998 Year 1 QA Summary - Pesticides and PCBs. California Department of Fish and Game.
CDFG Fish and Wildlife Water Pollution Control Laboratory Data Quality Assurance Report. 1999 Coastal Fish Contamination Program (CFCP Year 2). California Department of Fish and Game.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 68362, PCBs (Polychlorinated biphenyls)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88898

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

All twenty-one of the detected PCBs exceeded the evaluation guideline. The remaining 75 samples were reported as non-detect with reporting limits greater than the criteria, therefore were not used in the assessment.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for total PCBs is 22.7 ug/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	99630	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Cadmium
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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 1 line of evidence is available in the administrative record to assess this pollutant. 1 of 32 samples exceeded the GUIDELINE. 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. 1 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

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 99630, Cadmium	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88951

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for cadmium is 9.6 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	99415	Region 4
Santa Monica Bay Offshore/Nearshore

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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 32 samples exceeded the GUIDELINE. 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. 0 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

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 99415, Chromium	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88883

Pollutant:

Chromium

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for chromium is 370 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	99416	Region 4
Santa Monica Bay Offshore/Nearshore

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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 3 samples exceeded the GUIDELINE. 1 of 32 samples exceeded the GUIDELINE. 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. 0 of 3 and 1 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

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 99416, Copper	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88884

Pollutant:

Copper

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for copper is 270 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99416, Copper	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88885

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the criteria of 3 ug/L for dissolved copper in saltwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California's Ocean Plan Table B lists 6-month median concentration to protect aquatic life in marine waters.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

A total of four grab samples were collected during each sampling event from outside the marina basin (Marina del Rey Front Basin sites 5, 6, 7, & 8). Sample results were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

Samples were collected during the dry season only.

QAPP Information:

Samples were collected and analyzed in accordance with a Quality Assurance Project Plan that was prepared per State Water Resources Control Board Agreement No. 05-218-250 California Department of Pesticide Regulation, Sacramento, CA. (Available online at http://www.cdpr.ca.gov/docs/emon/surfwtr/protocols/qapp_study236.pdf)

QAPP Information Reference(s):


DECISION ID	99628	Region 4
Santa Monica Bay Offshore/Nearshore

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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 32 samples exceeded the GUIDELINE. 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. 0 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

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 99628, Lead	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88890

Pollutant:

Lead

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for lead is 218 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	98850	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Nickel
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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 32 samples exceeded the GUIDELINE. 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. 0 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

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 98850, Nickel	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98850, Nickel	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88895

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for nickel is 51.6 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	98851	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Nitrogen, ammonia (Total Ammonia)
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 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 189 samples exceeded the CRITERIA. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 189 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

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 98851, Nitrogen, ammonia (Total Ammonia)	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88896

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

189

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None out of 189 6-month medians exceed the Ocean Plan objective for ammonia. A total of 378 samples were taken.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Surface water shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The Ocean Plan ammonia objective for marine aquatic life is a 6-month median of 600 ug/L as N.

Guideline Reference:

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

Spatial Representation:

Samples were collected at stations 3204, 3205, 3304, 3305, 3306, 3404, 3405, 3406, 3504, 3505, 3506, 3604, 3605, 3606, 3704, 3705, 3706, 3804, 3805, 3904, and 4003.

Temporal Representation:

Samples were taken quarterly from February 2006 to May 2010.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements.

QAPP Information Reference(s):


DECISION ID	98753	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Selenium
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 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 1 sample exceeded the GUIDELINE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 1 sample exceeded the GUIDELINE and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

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 98753, Selenium	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88904

Pollutant:

Selenium

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:

Non-fixed station physical/chemical (conventional + toxicants)

Data Used to Assess Water Quality:

None of nineteen samples exceeded the evaluation guideline. No liver tissue were used in this assessment. All concentrations reported were presumed to be reported on a wet weight basis as that is standard for reporting tissue data.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The OEHHA fish contaminant goal is 10.9 ppm. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. A background dietary consumption rate of 0.114 mg/day was applied for this micronutrient. (OEHHA, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Samples were collected from nearfield and from Zones 4 & 5. Both rig fishing and trawl fishing sampling techniques were deployed.

Temporal Representation:

Samples were taken in August of 2006, October and November of 2007, and August - September of 2007.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	99303	Region 4
Santa Monica Bay Offshore/Nearshore

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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 2 lines of evidence are available in the administrative record to assess this pollutant. 6 of 32 samples exceed the GUIDELINE. 0 of 0 samples exhibited sediment toxicity. Based on the readily available data and information, the weight of evidence indicates that there is INSUFFICIENT justification FOR 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. 6 of 32 samples exceeded the GUIDELINE, however, there is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

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 99303, Silver	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88905

Pollutant:

Silver

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Six of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for silver is 3.7 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99303, Silver	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	99629	Region 4
Santa Monica Bay Offshore/Nearshore

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 sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List. 2 lines of evidence are available in the administrative record to assess this pollutant. 0 of 3 samples exceeded the GUIDELINE. 0 of 32 samples exceeded the GUIDELINE. 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. 0 of 3 and 0 of 32 samples exceeded the GUIDELINE and this this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

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 99629, Zinc	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88908

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for zinc is 410 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99629, Zinc	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88906

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fixed station physical/chemical (conventional plus toxic pollutants)

Data Used to Assess Water Quality:

None of the three samples exceeded the criteria of 20 ug/L for dissolved zinc in saltwater.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California's Ocean Plan Table B lists 6-month median concentration to protect aquatic life in marine waters.

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

A total of four grab samples were collected during each sampling event from outside the marina basin (Marina del Rey Front Basin sites 5, 6, 7, & 8). Sample results were averaged per sample event.

Temporal Representation:

Samples were collected on three separate sampling events during the dry season (July - October) in 2006.

Environmental Conditions:

Samples were collected during the dry season only.

QAPP Information:

QAPP Information Reference(s):


DECISION ID	98852	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	pH
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 a single line of evidence is necessary to assess listing status. 1 line of evidence is available in the administrative record to assess this pollutant. 0 of 12 samples exceeded the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. 0 of 12 samples exceeded the OBJECTIVE and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples is needed to determine if a beneficial use is fully supported using table 3.2. 4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

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 98852, pH	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88903

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Numeric data generated from 12 minimums and maximums had no exceedences.

Data Reference:

Data for Various Pollutants in California Marinas, 2006.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pH of bays or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the following stations: Marina del Rey Front Basin 5.1 Marina del Rey Front Basin 5.2 Marina del Rey Front Basin 5.3 Marina del Rey Front Basin 6.1 Marina del Rey Front Basin 6.2 Marina del Rey Front Basin 6.3 Marina del Rey Front Basin 7.1 Marina del Rey Front Basin 7.2 Marina del Rey Front Basin 7.3 Marina del Rey Front Basin 8.1 Marina del Rey Front Basin 8.2 Marina del Rey Front Basin 8.3

Temporal Representation:

Samples were collected twice in August 2006 and once in September 2006.

Environmental Conditions:

QAPP Information:

NPDES quality assurance.

QAPP Information Reference(s):


DECISION ID	99631	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Arsenic
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 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. 2 lines of evidence are available in the administrative record to assess this pollutant. 19 of 19 samples exceeded the GUIDELINE. 0 of 32 samples exceeded the GUIDELINE. 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. 19 of 19 and 0 of 32 samples exceeded the GUIDELINE 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 99631, Arsenic	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88950

Pollutant:

Arsenic

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:

Non-fixed station physical/chemical (conventional + toxicants)

Data Used to Assess Water Quality:

All nineteen samples exceeded the evaluation guideline. No liver tissue were used in this assessment. All concentrations reported were presumed to be reported on a wet weight basis as that is standard for reporting tissue data. Ten percent of the total arsenic result was used to estimate of the amount of inorganic arsenic in the sample; this number was screened against the guideline.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified guideline for arsenic in fish tissue is 0.0034 ppm. The guideline, 0.0034ppm, is the screening guideline from ¿Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis,¿ 2000, (CalWQA ref 3756) and assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. The assessment used an assumption that 10% of the arsenic would be inorganic.

Guideline Reference:

Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Samples were collected from nearfield and from Zones 4 & 5. Both rig fishing and trawl fishing sampling techniques were deployed.

Temporal Representation:

Samples were taken in August of 2006, October and November of 2007, and August - September of 2007.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 99631, Arsenic	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88949

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for arsenic is 70 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	98793	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Mercury
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 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. 3 lines of evidence are available in the administrative record to assess this pollutant. 2 of 19 samples exceeded the GUIDELINE. 2 of 32 samples exceeded the GUIDELINE. 0 of 0 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. 2 of 19 samples exceeded the GUIDELINE 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 98793, Mercury	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4165

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Marine 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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98793, Mercury	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88894

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:

Non-fixed station physical/chemical (conventional + toxicants)

Data Used to Assess Water Quality:

Two of nineteen samples exceeded the evaluation guideline. No liver tissue were used in this assessment. All concentrations reported were presumed to be reported on a wet weight basis as that is standard for reporting tissue data.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The OEHHA fish contaminant goal is 0.22 ppm. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. Total mercury is assumed to be 100% methylmercury. The more conservative reference dose of 1x10-4 mg/kg-day.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Samples were collected from nearfield and from Zones 4 & 5. Both rig fishing and trawl fishing sampling techniques were deployed.

Temporal Representation:

Samples were taken in August of 2006, October and November of 2007, and August - September of 2007.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 98793, Mercury	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

88891

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Two of the 32 samples exceeded the objective.

Data Reference:

Data from Hyperion Treatment Plant NPDES Permit no. CA0109991, Jan. 2006-Jun. 2010

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

In saline water sediments the effects range median (predictive of sediment toxicity) for mercury is 0.71 mg/Kg dry weight ( Long, E.R., D.D. MacDonald, S.L. Smith, and F.D. Calder. 1995).

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were taken annually from 2006 though 2009, in July.

Environmental Conditions:

QAPP Information:

Samples were collected as part of NPDES monitoring requirements, permit number CA0109991.

QAPP Information Reference(s):


DECISION ID	68866	Region 4
Santa Monica Bay Offshore/Nearshore

Pollutant:	Trash
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)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Name:	Santa Monica Bay Offshore/Nearshore Debris (66)
TMDL Project Code:	404
Date TMDL Approved by USEPA:	03/20/2012
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	303(d) listing decisions made prior to 2006 were not held in an assessment database. There is sufficient justification to place waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The Santa Monica Bay Debris TMDL was approved by USEPA on 03/20/2012.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 68866, Trash	Region 4
Santa Monica Bay Offshore/Nearshore

LOE ID:

4163

Pollutant:

Debris

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Non-Contact Recreation

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 pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Placeholder reference pre-2006 303(d)

Evaluation Guideline:

Unspecified

Guideline Reference:

Placeholder reference pre-2006 303(d)

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):