| |
DECISION ID |
6063 |
| |
| Pollutant: |
Selenium |
| Final Listing Decision: |
Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Revised |
| Reason for Delisting: |
State determines water quality standard is being met |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Three 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 for 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. 12 of 171 samples exceeded the California Toxics Rule Criterion Continuous Concentration for selenium and this does not exceed the allowable frequency listed in Table 4.1 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 not 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
| |
| LOE ID: |
2571 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
78 |
| Number of Exceedances: |
11 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Available data indicate numeric CTR standards are violated for total selenium. There were 11 out of 78 samples that exceeded the CTR value for selenium (USEPA, 2007). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
Basin Plan: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
The CTR value for selenium (chronic) is 5 ppb. |
| Guideline Reference: |
Placeholder reference 2006 303(d) |
| |
| Spatial Representation: |
Samples were collected throughout the water body. |
| Temporal Representation: |
|
| Environmental Conditions: |
|
| QAPP Information: |
Data record: 2003-2006, LA RWQCB comment letter, 2006 |
| QAPP Information Reference(s): |
|
| |
| LOE ID: |
25338 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| Aquatic Life Use: |
Wildlife Habitat |
| |
| Number of Samples: |
86 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
Zero of 86 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Selenium. Water quality samples were taken and analyzed for Selenium in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters. |
| Data Reference: |
NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011). |
| |
| Water Quality Objective/Criterion: |
CTR Dissolved Selenium Criterion for continuous concentration (CCC) in water for the protection of aquatic life: 5 ug/L. |
| Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Five stations: RA (above WRP), RC (Below WRP), RD (end of concrete-lined portion of San Jose Creek), C1 (above SJWRP 002), C2 (below SJWRP 002) |
| Temporal Representation: |
Grab samples were taken and analyzed on a monthly basis from August 2005 to February 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
San Jose Creek Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053911 (County Sanitation Districts of Los Angeles County) |
| |
Pomona Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053619 (County Sanitation Districts of Los Angeles County) |
|
| |
| LOE ID: |
26871 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| Aquatic Life Use: |
Wildlife Habitat |
| |
| Number of Samples: |
7 |
| Number of Exceedances: |
1 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
One of seven samples exceeded the California Toxics Rule Criterion Continuous Concentration for Selenium. Water quality samples were taken and analyzed for Selenium in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters. |
| Data Reference: |
Monitoring Data (MS4 Data) for Tributaries of the San Gabriel River Watershed- CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the Incorporated Cities therein, Except the City of Long Beach |
| |
| Water Quality Objective/Criterion: |
CTR Dissolved Selenium Criterion for continuous concentration (CCC) in water for the protection of aquatic life: 5 ug/L. |
| Objective/Criterion Reference: |
Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station TS15 upstream of the confluence of Puente Creek. |
| Temporal Representation: |
Grab samples were taken approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
Monitoring and Reporting Program - CI 6948 for order no. 01-182
NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of
Long Beach
|
| |
DECISION ID |
7050 |
| |
| Pollutant: |
Coliform Bacteria |
| Final Listing Decision: |
Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Revised |
| Sources: |
Source Unknown |
| Expected TMDL Completion Date: |
2009 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 4.3 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Three lines of evidence are available in the administrative record to assess pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against 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. 140 of 261 samples exceeded the Basin Plan single sample indicator bacteria objectives and this exceeds the allowable frequency listed 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. |
| |
| 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. |
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| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 7050 |
| |
| LOE ID: |
26873 |
| |
| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Water Contact Recreation |
| |
| Number of Samples: |
6 |
| Number of Exceedances: |
5 |
| |
| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
Five of six samples exceeded the single-sample limit specified in the Basin Plan. A total of one out of one sample exceeded the geometric mean limit specified in the Basin Plan amendment. Samples were taken on a weekly and monthly basis in compliance with the Los Angeles County Sanitation Districts NPDES Permit (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| Data Reference: |
Monitoring Data (MS4 Data) for Tributaries of the San Gabriel River Watershed- CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the Incorporated Cities therein, Except the City of Long Beach |
| |
| 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 |
| |
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: |
The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station TS15 upstream of the confluence of Puente Creek. |
| Temporal Representation: |
Grab samples were taken approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
Monitoring and Reporting Program - CI 6948 for order no. 01-182
NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of
Long Beach
|
|
| |
| LOE ID: |
4147 |
| |
| Pollutant: |
Coliform Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Water Contact Recreation |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. |
| Data Reference: |
Placeholder reference pre-2006 303(d) |
| |
| Water Quality Objective/Criterion: |
Unspecified |
| Objective/Criterion Reference: |
Placeholder reference pre-2006 303(d) |
| |
| Evaluation Guideline: |
Unspecified |
| Guideline Reference: |
Placeholder reference pre-2006 303(d) |
| |
| Spatial Representation: |
Unspecified |
| Temporal Representation: |
Unspecified |
| Environmental Conditions: |
Unspecified |
| QAPP Information: |
Unspecified |
| QAPP Information Reference(s): |
|
| |
| LOE ID: |
25341 |
| |
| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Water Contact Recreation |
| |
| Number of Samples: |
255 |
| Number of Exceedances: |
135 |
| |
| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
135 of 255 samples exceeded the single-sample limit specified in the Basin Plan. A total of 25 of 36 samples exceeded the geometric mean limit specified in the Basin Plan amendment. Samples were taken on a weekly and monthly basis in compliance with the Los Angeles County Sanitation Districts NPDES Permit (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| Data Reference: |
NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011). |
| |
| 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 |
| |
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: |
The data was collected from four stations: RA (above WRP), RC (Below WRP), RD (end of concrete-lined portion of San Jose Creek), C1 (above SJWRP 002), C2 (below SJWRP 002). |
| Temporal Representation: |
The grab samples were taken and analyzed on a weekly and monthly basis from June 2004 to February 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
San Jose Creek Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053911 (County Sanitation Districts of Los Angeles County) |
| |
Pomona Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053619 (County Sanitation Districts of Los Angeles County) |
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DECISION ID |
16237 |
| |
| Pollutant: |
Sulfates |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
New Decision |
| Revision Status |
Revised |
| Sources: |
Wastewater |
| 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 3.2 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.
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. 40 of 150 samples exceed the California Code of Regulations secondary MCL for sulfate in San Jose Creek Reach 1and 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. |
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| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
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Lines of Evidence (LOEs) for Decision ID 16237 |
| |
| LOE ID: |
27251 |
| |
| Pollutant: |
Sulfates |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Municipal & Domestic Supply |
| |
| Number of Samples: |
150 |
| Number of Exceedances: |
40 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
40 of 150 samples exceeded the California Code of Regulations secondary MCL for sulfate in San Jose Creek Reach 1. Water quality samples were taken and analyzed for sulfate in accordance with the Los Angeles County Sanitation Districts NPDES Permit (No. CA0053911 and CA0053619)Monitoring and Reporting Program. |
| Data Reference: |
NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011). |
| |
| Water Quality Objective/Criterion: |
The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 250 mg/L for Sulfate to protect drinking water sources. |
| Objective/Criterion Reference: |
California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
The data was collected from four stations: RC (Below WRP), RD (end of concrete-lined portion of San Jose Creek), C1 (above SJWRP 002), C2 (below SJWRP 002). |
| Temporal Representation: |
The grab samples were taken and analyzed on a daily, weekly, and monthly basis from June 2004 to February 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
San Jose Creek Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053911 (County Sanitation Districts of Los Angeles County) |
| |
Pomona Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053619 (County Sanitation Districts of Los Angeles County) |
| |
DECISION ID |
9944 |
| |
| 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: |
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 3.2 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.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for 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. 35 of 149 samples exceeded the Basin Plan objective of 750 mg/L for TDS (water body specific: San Gabriel River watershed between Ramona Blvd. and Firestone Blvd.), 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 9944 |
| |
| LOE ID: |
21153 |
| |
| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| Aquatic Life Use: |
Wildlife Habitat |
| |
| Number of Samples: |
149 |
| Number of Exceedances: |
35 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
35 of 149 samples exceeded the Basin Plan objective for pH. Samples were taken on a daily, weekly, and monthly basis in compliance with the Los Angeles County Sanitation Districts NPDES Permit (No. CA0053911 and CA0053619)Monitoring and Reporting Program. |
| Data Reference: |
NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011). |
| |
| Water Quality Objective/Criterion: |
The Los Angeles RWQCB Basin Plan objective for TDS is 750 mg/L (water body specific: San Gabriel River watershed between Ramona Blvd. and Firestone Blvd.). |
| 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: |
The data was collected from four stations: RC (Below WRP), RD (end of concrete-lined portion of San Jose Creek), C1 (above SJWRP 002), C2 (below SJWRP 002). |
| Temporal Representation: |
The grab samples were taken and analyzed on a daily, weekly, and monthly basis from June 2004 to February 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
San Jose Creek Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053911 (County Sanitation Districts of Los Angeles County) |
| |
Pomona Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053619 (County Sanitation Districts of Los Angeles County) |
| |
DECISION ID |
9945 |
| |
| Pollutant: |
pH |
| 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 3.2 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.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for 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. 101 of 292 samples exceeded the Basin Plan objective for pH 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 9945 |
| |
| LOE ID: |
21152 |
| |
| Pollutant: |
pH |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| Aquatic Life Use: |
Wildlife Habitat |
| |
| Number of Samples: |
292 |
| Number of Exceedances: |
101 |
| |
| Data and Information Type: |
Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: |
101 of 292 samples exceeded the Basin Plan objective for pH. Samples were taken on a daily, weekly, and monthly basis in compliance with the Los Angeles County Sanitation Districts NPDES Permit (No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| Data Reference: |
NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011). |
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| Water Quality Objective/Criterion: |
The Los Angeles RWQCB Basin Plan states that: The pH of inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. |
| 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: |
The data was collected from four stations: RC (Below WRP), RD (end of concrete-lined portion of San Jose Creek), C1 (above SJWRP 002), C2 (below SJWRP 002). |
| Temporal Representation: |
Grab samples were taken and analyzed on a daily, weekly, and monthly basis from June 2004 to February 2007. |
| Environmental Conditions: |
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| QAPP Information: |
Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0053911 and CA0053619) Monitoring and Reporting Program. |
| QAPP Information Reference(s): |
San Jose Creek Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053911 (County Sanitation Districts of Los Angeles County) |
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Pomona Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0053619 (County Sanitation Districts of Los Angeles County) |