| Water Body Name: | Piru Creek (from gaging station below Santa Felicia Dam to headwaters) |
| Water Body ID: | CAR4034100020020131113814 |
| Water Body Type: | River & Stream |
DECISION ID |
4851 |
Region 4 |
Piru Creek (from gaging station below Santa Felicia Dam to headwaters) |
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| Pollutant: | pH |
| Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | Do Not Delist from 303(d) list (TMDL required list)(2006) |
| Revision Status | Original |
| Sources: | Conservation Discharge Releases | Nonpoint Source |
| Expected TMDL Completion Date: | 2019 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under section 4.2 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. Four of 24 samples exceeded the pH water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification in favor of removing this water segment-pollutant combination from the 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.Four of 24 samples exceeded the pH water quality objective. At least 26 samples are needed before a pollutant can be considered for removal from the list using the frequencies presented in Table 4.2 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. |
| Regional Board Decision Recommendation: | 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. |
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| LOE ID: | 2106 | ||||
| Pollutant: | pH | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Not Recorded | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 24 | ||||
| Number of Exceedances: | 4 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Twenty-four water samples, 4 samples exceeding (SWRCB, 2003). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Basin Plan: The pH of inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. Ambient pH levels shall not be changed more than 0.5 units from natural conditions as a result of waste discharge. | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | Samples representative of the Reach. | ||||
| Temporal Representation: | Quarterly sampling events. | ||||
| Environmental Conditions: | Data 2-5 years old, samples collected at site. | ||||
| QAPP Information: | United Water Conservation District. | ||||
| QAPP Information Reference(s): | |||||
DECISION ID |
4820 |
Region 4 |
Piru Creek (from gaging station below Santa Felicia Dam to headwaters) |
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| Pollutant: | Chloride |
| 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 | Original |
| Sources: | Source Unknown |
| Expected TMDL Completion Date: | 2019 |
| 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 line of evidence is available in the administrative record to assess this pollutant. A sufficient number of samples exceed the site specific chloride water quality objective. 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 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. Eight of 12 samples exceeded the site specific chloride water quality objective 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: | 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. |
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| LOE ID: | 2107 | ||||
| Pollutant: | Chloride | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Not Recorded | ||||
| Beneficial Use: | Agricultural Supply | ||||
| Number of Samples: | 12 | ||||
| Number of Exceedances: | 8 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | Numeric data generated from a total of twelve samples taken from below the Santa Felicia Dam, from July 2001 through April 2004 on a quarterly basis throughout the Year. Eight samples exceeded the site specific WQO for Piru Creek tributary to Santa Clara River, Reach 4 (LACSD, 2004b). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The Basin Plan Site Specific Water Quality Objective for Piru Creek (Tributary to Santa Clara River, Reach 4, shall not exceed 60 mg/l for the protection of Agricultural supply (AGR) BUs. | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | One sampling station sampled from July 2001 through April 2004. | ||||
| Temporal Representation: | Twelve samples taken on a quarterly basis from July 2001 through April 2004. | ||||
| Environmental Conditions: | Results are from samples taken from July 2001 through April 2004 below Santa Felicia Dam. | ||||
| QAPP Information: | Fruit Growers Laboratory Quality Manual. | ||||
| QAPP Information Reference(s): | |||||