| Water Body Name: | Hathaway Creek, unnamed tributary |
| Water Body ID: | CAR7193200020171212031244 |
| Water Body Type: | River & Stream |
DECISION ID |
101298 |
Region 7 |
Hathaway Creek, unnamed tributary |
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| Pollutant: | Turbidity |
| Final Listing Decision: | List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Sources: | Source Unknown |
| Expected TMDL Completion Date: | 2031 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Staff 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.
One line of evidence is available in the administrative record to assess this pollutant. Eleven of the 16 samples exceed the evaluation 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. Eleven of 16 samples exceed the evaluation guideline and this exceeds the allowable frequency listed in Table 3.2 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 Staff Decision Recommendation: | |
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| LOE ID: | 126718 | ||||
| Pollutant: | Turbidity | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Municipal & Domestic Supply | ||||
| Number of Samples: | 16 | ||||
| Number of Exceedances: | 11 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed STORET data for Hathaway Creek, unnamed tributary to determine beneficial use support and results are as follows: 11 of 16 samples exceeded the water quality standard for Turbidity. | ||||
| Data Reference: | Water quality data for federal, state, and tribal agencies submitted through the US EPA STorage and RETrival (STORET) database for the 2018 listing cycle. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses (CRBRWQCB, 2006). | ||||
| Objective/Criterion Reference: | Water Quality Control Plan Colorado River Basin, with amendments adopted through June 2006 | ||||
| Evaluation Guideline: | California Maximum Contaminant Levels (MCLs) apply to ambient surface waters under the Basin Plan's \Chemical Constituents\" objective. The Secondary MCL for turbidity is 5 NTU. Calculation of a numeric objective for other beneficial uses requires comparison with upstream or other background data which may not be available as part of the data used for water quality assessment. " | ||||
| Guideline Reference: | California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring | ||||
| Spatial Representation: | The samples were collected at 2 monitoring site(s) (MORONGO1_WQX-HE1, MORONGO1_WQX-HW1) | ||||
| Temporal Representation: | The samples were collected between the dates of 2010-10-14 and 2012-07-09 | ||||
| Environmental Conditions: | |||||
| QAPP Information: | QAPP not required for federal data | ||||
| QAPP Information Reference(s): | This is a placeholder reference for data which does not require a QAPP. | ||||