| |
DECISION ID |
13186 |
| |
| 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 |
| |
| 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.
One line of evidence is 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. 46 of 263 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. |
| |
| 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. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
| |
| LOE ID: |
25712 |
| |
| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Water Contact Recreation |
| |
| Number of Samples: |
263 |
| Number of Exceedances: |
46 |
| |
| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
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. |
| Data Reference: |
Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations |
| |
| Water Quality Objective/Criterion: |
The updated Basin Plan bacteria objectives states that E. coli density shall not exceed 235/100 ml and Fecal Coliform density shall not exceed 400/100 ml as single sample limits to protect water contact recreation in fresh water. The bacteria objectives also add that E. coli density shall not exceed 126/100 ml and Fecal coliform density shall not exceed 200/100 ml as geometric mean limits to protect water contact recreation in fresh water. The updated bacteria objectives are included in Basin Plan Amendment 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
| |
Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
VR07 sampling site is located at the Old Creek Road low water crossing, just off of Highway 33 (Lat 34.38700, Long -119.30700). VR08 sampling site is located just before Lion Creek enters San Antonio Creek (Lat 34.422022, Long -119.263552). VR09 sampling site is located just before Pirie Creek enters San Antonio Creek (Lat 34.434208, Long -119.24862). VR10 sampling site is located upper San Antonio Creek (Lat 34.433809, Long -119.24872). |
| 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 Channelkeeper, October 2004). |
| QAPP Information Reference(s): |
Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004) |
| |
DECISION ID |
13194 |
| |
| Pollutant: |
Total Dissolved Solids |
| 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: |
2023 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| 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.
One line 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. 74 of 222 samples exceed the Basin Plan water quality objective (reach specific) of 800 mg/L for TDS, 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. |
| |
| 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. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 13194 |
| |
| LOE ID: |
25715 |
| |
| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Municipal & Domestic Supply |
| |
| Number of Samples: |
222 |
| Number of Exceedances: |
74 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
Data collected for the Santa Barbara ChannelKeeper Water Quality Monitoring Program (2001 to 2007). A total of 74 out of 222 samples exceeded the water quality objective of 800 mg/L. |
| Data Reference: |
Santa Barbara Channelkeeper Water Quality Data Submittal and 303(d) List Recommendations |
| |
| Water Quality Objective/Criterion: |
Los Angeles RWQCB Basin Plan Water Quality Objective for Selected Constituents in Inland Surface Waters--water body specific for Ventura River Reach 4--is 800 mg/L for TDS. By the tributary rule this objective also applies to San Antonio Creek. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
| |
Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
VR07 sampling site is located at the Old Creek Road low water crossing, just off of Highway 33 (Lat 34.38700, Long -119.30700). VR08 sampling site is located just before Lion Creek enters San Antonio Creek (Lat 34.422022, Long -119.263552). VR09 sampling site is located just before Pirie Creek enters San Antonio Creek (Lat 34.434208, Long -119.24862). VR10 sampling site is located upper San Antonio Creek (Lat 34.433809, Long -119.24872). |
| 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 Channelkeeper, October 2004). |
| QAPP Information Reference(s): |
Ventura River Watershed Monitoring Program Quality Assurance Project Plan (Santa Barbara Channelkeeper, October 2004) |