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

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name: Mill Creek (Prado Area)
Water Body ID: CAR8012100019990211144540
Water Body Type: River & Stream
 
DECISION ID
16562
Region 8     
Mill Creek (Prado Area)
 
Pollutant: Alachlor | Atrazine | Azinphos-methyl (Guthion) | Carbaryl | Carbofuran | Chlorpyrifos | DDE (Dichlorodiphenyldichloroethylene) | Diazinon | Dieldrin | Disulfoton | Malathion | Methyl Parathion | Molinate | Simazine | Thiobencarb/Bolero
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One lines of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of one sample exceeded the USEPA National Recommended Ambient Water Quality Criteria and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 2 samples is needed for application of table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
 
USEPA Action (if applicable):
 
 
Line of Evidence (LOE) for Decision ID 16562, Multiple Pollutants
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 7817
 
Pollutant: Alachlor | Atrazine | Azinphos-methyl (Guthion) | Carbaryl | Carbofuran | Chlorpyrifos | DDE (Dichlorodiphenyldichloroethylene) | Diazinon | Dieldrin | Disulfoton | Malathion | Methyl Parathion | Molinate | Simazine | Thiobencarb/Bolero
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: The only sample collected did not show exceedances of the guidelines
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan for the Santa Ana River Basin
 
Evaluation Guideline: USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Max - alachlor: 76 ppb, atrazine: 1 ppb, azinphos methyl: 0.01 ppb, carbaryl: 0.02 ppb, carbofuran: 0.5 ppb, disulfoton: 0.05 ppb, malathion: 0.01 ppb. California Department of Fish and Game: chlropyrifos: 0.014 ppb, parathion: 0.08 ppb, diazinon: 0.08 ppb, molinate: 13 ppb, permethrin: 0.03 ppb, thiobencarb: 3.1 ppb. USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Cont Conc 4 day ave: DDE: 0.001 ppb. CTR Freshwater aquatic life protection Cont Conc 4 day ave - dieldrin: 0.056 ppb
Guideline Reference: Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
  National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA
  Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The sample was collected at Mill Creek Near Splatters Duck Club In Prado Wetlands California_USGS NAWQA site
Temporal Representation: The sample was collected on 8/8/00
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation.
QAPP Information Reference(s):
 
 
DECISION ID
17807
Region 8     
Mill Creek (Prado Area)
 
Pollutant: Aluminum | Cadmium | Chromium, hexavalent | Copper | Lead | Mercury | Nickel | Selenium | Silver | Zinc
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Two (2) lines of evidence are available in the administrative record to assess this pollutant. The one sample from each line of evidence that was taken did not exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of one (1) sample exceeded the USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of two samples is needed for application of table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
 
USEPA Action (if applicable):
 
 
Line of Evidence (LOE) for Decision ID 17807, Multiple Pollutants
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 8377
 
Pollutant: Cadmium | Copper | Lead | Nickel | Silver | Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the samples exceeded the standards
Data Reference: 2006 HCMP Database
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Basin Plan objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan for the Santa Ana River Basin
 
Evaluation Guideline: The California Toxics Rule cadmium criteria is hardness dependent and ranged as follows: cadium - 2.95 ppb; copper - 11.37 ppb; lead - 4.27 ppb; nickel - 63.43 ppb; silver - 6.04 ppb; zinc - 145.73 ppb
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The sample was taken in Mill Creek near Chino
Temporal Representation: The sample was taken on 8/16/2005
Environmental Conditions:
QAPP Information: The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 17807, Multiple Pollutants
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 30526
 
Pollutant: Aluminum | Chromium, hexavalent | Mercury | Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: The only sample collected did not exceed the guidelines.
Data Reference: 2006 HCMP Database
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Basin Plan Objective: Teh concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan for the Santa Ana River Basin
 
Evaluation Guideline: USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection - aluminun: 87 ppb, mercury: 0.77 ppb.

CTR Fresh Water Aquatic Life Protection 4 day Average continuous concentration - chromium VI: 11 ppb, selenium: 20 ppb.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The sample was collected at the Mill Creek at Chino sampling station.
Temporal Representation: The sample was collected on 8/16/2005
Environmental Conditions:
QAPP Information: The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.
QAPP Information Reference(s):
 
 
DECISION ID
7261
Region 8     
Mill Creek (Prado Area)
 
Pollutant: Nutrients
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Agriculture | Dairies
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.


State Board Review and Conclusion:
This Santa Ana Regional Board staff recommended to continue listing this previously listed water body for Nutrients in the centralized database for the assessment. However, the centralized database was not used to generate the final Staff Report for Region 8 and this decision did not get included for Regional Water Board approval. Based on the review of the data and information in the centralized database, State Water Board staff recommends to continue to List this water body-pollutant combination.
 
Regional Board Decision Recommendation: No new data were assessed for 2008. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
USEPA Action (if applicable): USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.
 
 
Line of Evidence (LOE) for Decision ID 7261, Nutrients
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 4420
 
Pollutant: Nutrients
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
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
7262
Region 8     
Mill Creek (Prado Area)
 
Pollutant: Total Suspended Solids (TSS)
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Dairies
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.


State Board Review and Conclusion:
This Santa Ana Regional Board staff recommended to continue listing this previously listed water body for Total Suspended Solids (TSS) in the centralized database for the assessment. However, the centralized database was not used to generate the final Staff Report for Region 8 and this decision did not get included for Regional Water Board approval. Based on the review of the data and information in the centralized database, State Water Board staff recommends to continue to List this water body-pollutant combination.
 
Regional Board Decision Recommendation: No new data were assessed for 2008. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
USEPA Action (if applicable): USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.
 
 
Line of Evidence (LOE) for Decision ID 7262, Total Suspended Solids (TSS)
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 4421
 
Pollutant: Total Suspended Solids (TSS)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
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
6881
Region 8     
Mill Creek (Prado Area)
 
Pollutant: Pathogens
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2006)
Revision Status Revised
Sources: Dairies
TMDL Name: Prado Area Streams Pathogen TMDL
TMDL Project Code: 90
Date TMDL Approved by USEPA: 05/16/2007
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:
This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

The Prado Area Streams Pathogen TMDL was approved by the RWQCB in 2007 and subsequently approved by USEPA on 5/16/07.

Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list.

State Board Review and Conclusion:
This Santa Ana Regional Board staff recommended to continue listing this previously listed water body for Pathogens in the centralized database for the assessment. However, the centralized database was not used to generate the final Staff Report for Region 8 and this decision did not get included for Regional Water Board approval. Based on the review of the data and information in the centralized database, State Water Board staff recommends to continue to List this water body-pollutant combination.
 
Regional Board Decision Recommendation: No new data were assessed for 2008. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of the available data and information for this recommendation, SWRCB staff conclude that the water body should be placed in the Water Quality Limited Segments Being Addressed category of the section 303(d) list because a TMDL has been approved by USEPA and an implementation plan has been approved.
 
USEPA Action (if applicable):
 
 
Line of Evidence (LOE) for Decision ID 6881, Pathogens
Region 8     
Mill Creek (Prado Area)
 
LOE ID: 2992
 
Pollutant: Pathogens
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):