| Pollutant: |
pH |
| 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: |
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available. |
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| 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. |
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| State Board Review of Regional Board Conclusion and Recommendation: |
|
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| State Board Decision Recommendation: |
|
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Line of Evidence (LOE) for Decision ID 115027, pH
|
Region 9 |
Gonzales Canyon Creek (San Diego County) |
|
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| LOE ID: |
145208 |
| |
| Pollutant: |
pH |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
2 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Water Board staff assessed San Diego Region NPDES data for Gonzales Canyon Creek (San Diego County) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for pH. |
| Data Reference: |
Field, Habitat, Sediment, Toxicity, Water data for the 2020/2022 integrated report in Region 9. |
| |
| SWAMP Data: |
Non-SWAMP |
| |
| Water Quality Objective/Criterion: |
In inland surface waters the pH shall not be depressed below 6.5 nor raised above 8.5. |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin |
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| Evaluation Guideline: |
|
| Guideline Reference: |
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| Spatial Representation: |
The samples were collected at 1 monitoring site (GZC_SDG) |
| Temporal Representation: |
The samples were collected between the dates of 2017-04-10 and 2018-02-12 |
| Environmental Conditions: |
|
| QAPP Information: |
County of San Diego - Dept of Public Works. 2008. Quality Assurance Project Plan from Southern California Bight. ., Weston Solutions, Inc.. 2014. Quality Assurance Project Plan for the County of San Diego's Inland Surface Water Monitoring Program., Wood. 2019. Quality Assurance Project Plan Equivalency Los Penasquitos Watershed Management Area Sediment Load Total Maximum Daily Load., Weston Solutions, Inc.. 2019. Quality Assurance Project Plan Equivalency for NPDES Receiving Water Monitoring. |
| QAPP Information Reference(s): |
Quality Assurance Project Plan from Southern California Bight. |
| QAPP Information Reference(s): |
Quality Assurance Project Plan Equivalency for NPDES Receiving Water Monitoring |
| QAPP Information Reference(s): |
Quality Assurance Project Plan for the County of San Diego's Inland Surface Water Monitoring Program |
| QAPP Information Reference(s): |
Quality Assurance Project Plan Equivalency Los Penasquitos Watershed Management Area Sediment Load Total Maximum Daily Load |
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