| Water Body Name: | Santa Ana River, Reach 5 |
| Water Body ID: | CAR8015200020011107163238 |
| Water Body Type: | River & Stream |
DECISION ID |
25655 |
Region 8 |
Santa Ana River, Reach 5 |
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| 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: | Do Not List on 303(d) list (TMDL required list)(2010) |
| Revision Status | Original |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | Region 8 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.
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 (1) line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of eight (8) samples exceeded the US EPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Maximum 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: | Region 8 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.
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 Staff Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | Region 8 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle.
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded. |
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| LOE ID: | 7837 | ||||
| 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: | 8 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Of the eight samples collected none exceeded 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 Regions 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, disulfoton: 0.05 ppb, simazine: 10 ppb, carbofuran: 0.5 ppb. California Department of Fish and Game: chlropyrifos: 0.014 ppb, parathion: 0.08 ppb, permethrin: 0.03 ppb, diazinon: 0.08 ppb. CTR Freshwater aquatic life protection Cont Conc 4 day ave - dieldrin: 0.056 ppb, DDE: 0.001 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 | |||||
| Compilation of Water Quality Goals | |||||
| Spatial Representation: | Santa Ana River Near Mentone California_USGS NAWQA site | ||||
| Temporal Representation: | 2/20/01, 3/22/01, 4/16/01, 5/17/01, 6/14/01, 7/10/01, 8/13/01, 9/13/01. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation. | ||||
| QAPP Information Reference(s): | |||||