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DECISION ID |
13398 |
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| Pollutant: |
Total Dissolved Solids |
| 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 |
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| Weight of Evidence: |
This pollutant is being considered for placement on the 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.
Two lines of evidence are available in the administrative record to assess this pollutant. Two 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. Two of 92 samples exceeded the Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--of 1000 mg/L for TDS, and this does not exceed 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. |
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| RWQCB Board Decision / Staff 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 applicable water quality standards are not being exceeded. |
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| SWRCB Board Decision / Staff Recommendation: |
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| USEPA Decision: |
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| LOE ID: |
25739 |
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| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
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| Beneficial Use: |
Municipal & Domestic Supply |
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| Number of Samples: |
64 |
| Number of Exceedances: |
2 |
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| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
Data collected for the Santa Barbara Channel Keeper Water Quality Monitoring Program (2001 to 2007). A total of two out of 64 exceeded the water quality objective of 1000 mg/L for TDS. |
| Data Reference: |
Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations |
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| Water Quality Objective/Criterion: |
The Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--is 1000 mg/L for TDS. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
VR6 sampling site is located below the Ventura Countys Foster Park, slightly downstream of the Casitas Vista Drive bridge (Lat 34.422022, Long -119.263552). |
| Temporal Representation: |
Grab samples taken and analyzed on monthly basis from August 2001 to January 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data collected and analyzed according to the provisions of the Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channel keeper, October 2004). |
| QAPP Information Reference(s): |
Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004) |
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| LOE ID: |
25742 |
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| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
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| Beneficial Use: |
Municipal & Domestic Supply |
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| Number of Samples: |
28 |
| Number of Exceedances: |
0 |
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| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
Data collected for the Ventura County Stormwater Monitoring Program (2000-2004), Permit No. CAS004002. A total of zero of 28 samples exceeded the water quality objective of 1000 mg/L for TDS. |
| Data Reference: |
Monitoring Reports for the Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002
|
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| Water Quality Objective/Criterion: |
The Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 3--is 1000 mg/L for TDS. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
ME-VR sampling site is located at Casitas Vista Rd at Foster Park (Lat 34.35194, Long -119.30722, NAD 27). |
| Temporal Representation: |
Grab samples taken from ME-VR and analyzed on wet-weather and dry-weather events from January 2000 to May 2004. |
| Environmental Conditions: |
|
| QAPP Information: |
Data collected and analyzed according to the provisions of the Ventura County MS4 Monitoring and reporting program No. CI 7388 for Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002. |
| QAPP Information Reference(s): |
Monitoring and reporting program No. CI 7388 for Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District,
County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002
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DECISION ID |
13171 |
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| Pollutant: |
Indicator Bacteria |
| 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: |
2021 |
| Impairment from Pollutant or Pollution: |
Pollutant |
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| Weight of Evidence: |
This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant.
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. 13 of 87 samples exceeded the Basin Plan Water Quality Objects for indicator bacteria in fresh water, 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 met. |
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| RWQCB Board Decision / Staff Recommendation: |
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
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| SWRCB Board Decision / Staff Recommendation: |
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| USEPA Decision: |
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Lines of Evidence (LOEs) for Decision ID 13171 |
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| LOE ID: |
25708 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
15 |
| Number of Exceedances: |
7 |
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| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
Data collected for the Ventura County Stormwater Monitoring Program (2002-2004), Permit No. CAS004002. A a total of seven out of 15 for E. coli samples exceeded the single sample limit (Ventura County Stormwater Monitoring, 2002-2004). |
| Data Reference: |
Monitoring Reports for the Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002
|
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| Water Quality Objective/Criterion: |
The Basin Plan bacteria objectives state that to protect water contact recreation in fresh waters individual samples shall not exceed the following limits: fecal coliform density shall not exceed 400/100 ml; and E. coli density shall not exceed 235/100 ml. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the fecal coliform density shall not exceed 200/100 ml; and the E. coli density shall not exceed 126/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
|
| Guideline Reference: |
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| Spatial Representation: |
ME-VR sampling site is located at Casitas Vista Rd at Foster Park (Lat 34.35194, Long -119.30722, NAD 27). |
| Temporal Representation: |
Grab samples taken from ME-VR and analyzed on wet-weather and dry-weather events from November 2002 to December 2004. |
| Environmental Conditions: |
|
| QAPP Information: |
Data collected and analyzed according to the provisions of the Ventura County MS4 Monitoring and reporting program No. CI 7388 for Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District, County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002. |
| QAPP Information Reference(s): |
Monitoring and reporting program No. CI 7388 for Storm Water Management/Urban Runoff Discharges for Ventura County Flood Control District,
County of Ventura, and the cities of Ventura County NPDES Permit No. CAS004002
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| LOE ID: |
25707 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
72 |
| Number of Exceedances: |
6 |
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| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
Data collected for the Santa Barbara Channelkeeper Water Quality Monitoring Program (2001 to 2007). A total of six out of 72 for E. coli samples exceeded the single sample limit (Santa Barbara Channel Keeper, 2007). |
| Data Reference: |
Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations |
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| Water Quality Objective/Criterion: |
The Basin Plan bacteria objectives state that to protect water contact recreation in fresh waters individual samples shall not exceed the following limits: fecal coliform density shall not exceed 400/100 ml; and E. coli density shall not exceed 235/100 ml. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the fecal coliform density shall not exceed 200/100 ml; and the E. coli density shall not exceed 126/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
|
| Guideline Reference: |
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| Spatial Representation: |
VR06 sampling site is located below the Ventura Countys Foster Park, slightly downstream of the Casitas Vista Drive bridge (Lat 34.351825, Long -119.307995). |
| Temporal Representation: |
Grab samples taken and analyzed on monthly basis from January 2001 to February 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data collected and analyzed according to the provisions of the Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channel keeper, October 2004). |
| QAPP Information Reference(s): |
Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004) |