| |
DECISION ID |
17913 |
| |
| Pollutant: |
Benthic Community Effects |
| 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: |
Pollution |
| |
| Weight of Evidence: |
Benthic Community Effects is being considered for placement on the section 303(d) list under sections 3.9 and 3.2 of the Listing Policy. Under section 3.9, an additional line of evidence associating the Benthic Community Effects with a water or sediment concentration of pollutants is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this indicator. 17 of 17 samples exceeded the water quality objective.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing Benthic Community Effects in this water segment 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. 17 of 17 samples exceeded the Index of Biological Integrity (IBI) value of "poor" water quality for this area and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy, however as required under section 3.9 of the Listing Policy, pollutant(s) could not be directly associated with the Benthic Community Effects.
4. Pursuant to section 3.11 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 not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
| |
| LOE ID: |
27031 |
| |
| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Adverse Biological Responses |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
13 |
| Number of Exceedances: |
13 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Thirteen samples of IBI data were taken from May 2001 to May 2007 at one sampling site. Of the total number of samples, all thirteen of the samples exceeded the IBI impairment threshold. |
| Data Reference: |
Stream Bioassessment Data. Co-permitee Data. Collected 2002-2007. |
| |
| Water Quality Objective/Criterion: |
From the San Diego Basin Plan the objective is: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board. |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9) |
| Guideline Reference: |
"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.
|
| |
| Spatial Representation: |
Samples were collected at one site: TC-TCNP on Tecolote River. |
| Temporal Representation: |
Sampling occurred during May and October annually over a six year period from May 2001 to October 2006 and during May 2007. |
| Environmental Conditions: |
|
| QAPP Information: |
Quality Control for collection and identification was conducted in accordance with the Quality Assurance Manual for Freshwater Bioassessment. |
| QAPP Information Reference(s): |
QUALITY ASSURANCE MANUAL FOR FRESHWATER BIOASSESSMENT
Revision 0 |
|
| |
| LOE ID: |
26470 |
| |
| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Adverse Biological Responses |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
4 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Four samples of IBI data were taken from November 1998 to May 2000 at one sampling site. Of the total number of samples, all four samples exceeded the IBI impairment threshold. |
| Data Reference: |
Fish and Game IBI Data |
| |
| Water Quality Objective/Criterion: |
From the San Diego Basin Plan the objective is: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board. (SDRWQCB, 1995) |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
The Index of Biological Integrity (IBI) is an analytical tool that can be used to assess the biological and physical condition of streams and rivers within a zero to one hundred scoring range: Very Poor 0-19, Poor 20-39, Fair 40-59, Good 60- 79, Very Good 80-100. The IBI score of 39 was set as an impairment threshold because it is a statistical criterion of two standard deviations below the mean reference site score which defines the boundary between 'fair' and 'poor' IBI creek conditions. (Ode, p. 9) |
| Guideline Reference: |
"A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams". Environmental Management. Volume 35, number 1 (2005): 1-13.
|
| |
| Spatial Representation: |
Samples were collected at one site: 906TCTCNP on Tecolote River. |
| Temporal Representation: |
Sampling occurred during one to two events annually from November 1998 to May 2000. |
| Environmental Conditions: |
|
| QAPP Information: |
Quality Control for collection and identification was conducted in accordance with the Quality Assurance Project Plan for the California Stream Bioassessment Procedure and the State of California, California Monitoring an Assessment Program: "CMAP", Quality Assurance Project Plan. |
| QAPP Information Reference(s): |
State of California, California Monitoring and Assessment Program: "CMAP". |
| |
Quality Assurance Project Plan for the California Stream Bioassessment Procedure |
| |
The San Diego Stream Team Quality Assurance Project Plan |
| |
DECISION ID |
16719 |
| |
| Pollutant: |
Nitrogen |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
New Decision |
| Revision Status |
Revised |
| Sources: |
Nonpoint Source | Point Source | Urban Runoff/Storm Sewers |
| 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.
Two lines of evidence are available in the administrative record to assess this pollutant. Thirty-three of 40 of the samples exceed the Basin Plan water quality objective for Total Nitrogen.
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. Thirty-three of 40 of the samples exceed the Basin Plan water quality objective for Total Nitrogen, 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 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 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 16719 |
| |
| LOE ID: |
7192 |
| |
| Pollutant: |
Total Nitrogen as N |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
37 |
| Number of Exceedances: |
33 |
| |
| Data and Information Type: |
Fixed station physical/chemical monitoring (conventional pollutants only) |
| Data Used to Assess Water Quality: |
Thirty three of thirty seven samples collected exceed the water quality objective according to results in the San Diego County Municipal Copermittees Annual Progress Report, 2007. Samples were collected two to four times a year from 1994-2006 |
| Data Reference: |
Urban Runoff Monitoring, Volume 1- Final Report. |
| |
| Water Quality Objective/Criterion: |
Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. (RWQCB, 2007)
A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total phosphorus, P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used. (RWQCB, 2007) |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Spatial Representation: |
Samples were collected at the mass loading station located near the lower boundary of the watershed on the east side of Morena Boulevard. |
| Temporal Representation: |
Samples were collected two to four times a year from 1994-2006 |
| Environmental Conditions: |
Samples were collected during wet weather. |
| QAPP Information: |
QA/QC conducted according to Federal Regulations under requirements of a NPDES permit. |
| QAPP Information Reference(s): |
|
| |
| LOE ID: |
7379 |
| |
| Pollutant: |
Total Nitrogen as N |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
3 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Fixed station physical/chemical monitoring (conventional pollutants only) |
| Data Used to Assess Water Quality: |
None of the three samples collected exceed the water quality objective according to results in the Surface Water Ambient Monitoring Program Report, 2007. Samples were collected on June 5, March 14, and April 24, 2002. |
| Data Reference: |
Monitoring data for Region 9 |
| |
| Water Quality Objective/Criterion: |
Water bodies shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. (RWQCB, 2007)
A desired goal in order to prevent plant nuisance in streams and other flowing waters appears to be 0.1 mg/L total phosphorus, P. These values are not to be exceeded more than 10% of the time unless studies of the specific water body in question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold values have not been set for nitrogen compounds; however, natural ratios of nitrogen to phosphorus are to be determined by surveillance and monitoring and upheld. If data are lacking, a ratio of N:P = 10:1, on a weight to weight basis shall be used. (RWQCB, 2007) |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Spatial Representation: |
Samples were collected from the monitoring station Tecolote Creek 3 (station id: 906LPTEC3 lat/long: 32.77633/-117.18608), located on the main stem of Tecolote Creek. |
| Temporal Representation: |
Samples were collected on June 5, March 14, and April 24, 2002. |
| Environmental Conditions: |
The first sample was taken during declining base flow respectively. The last two were taken during wet weather, between storm events and wet weather, high base flow respectively. |
| QAPP Information: |
Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program. |
| QAPP Information Reference(s): |
2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA. |
| |
DECISION ID |
16718 |
| |
| Pollutant: |
Selenium |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
New Decision |
| Revision Status |
Revised |
| Sources: |
Natural 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 3.1 of the Listing Policy. Under section 3.1 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. Three of three of the samples exceed the California Toxics Rule water quality objective for Selenium.
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. Three of three of the samples exceed the California Toxics Rule water quality objective for Selenium, 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. |
| |
| 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 16718 |
| |
| LOE ID: |
7579 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Dissolved |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
3 |
| Number of Exceedances: |
3 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
Three water samples were collected at Tecolote Creek station 906LPTEC3 on March, April, June, and September 2002. All three samples showed excessive selenium concentrations according to results in California's Surface Water Ambient Monitoring Program Report, 2007. Samples were collected in March, April, June, and September 2002. |
| Data Reference: |
Monitoring data for Region 9 |
| |
| Water Quality Objective/Criterion: |
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (RWQCB, 2007). CTR Freshwater Chronic (CCC) 5 ug/L; (U.S. EPA, 2000). |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA. |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA. |
| |
| Spatial Representation: |
Water samples were collected at Tecolote Creek station 906LPTEC3; (Latitude 33.7768533, Longitude -117.18618). |
| Temporal Representation: |
Samples were collected in March, April, and June 2002. |
| Environmental Conditions: |
|
| QAPP Information: |
Quality control for the chemical analysis portion of this study was conducted in accordance with the California's Surface Water Ambient Monitoring Program. |
| QAPP Information Reference(s): |
2002. Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. California Department of Fish and Game, Monterey, CA. |
| |
DECISION ID |
5092 |
| |
| Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
| Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Impairment from Pollutant or Pollution: |
Pollution |
| |
| Weight of Evidence: |
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 following:
The single line of evidence in the record to assess this pollutant consists of bioassessment data. This data shows that relative to other waterbodies in the study, the Tecolote Creek had medium to high physical habitat quality. Relative to the other sampled waterbodies, the BMI ranking for the Tecolote Creek site for11/1998 was around average, but was well below average for 05/1999. However, this information on its own is insufficient to determine with the confidence and power required by the Listing Policy since it is not associated with any water or sediment concentrations of pollutants (Section 3.9). |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5092 |
| |
| LOE ID: |
3327 |
| |
| Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
| LOE Subgroup: |
Population/Community Degradation |
| Matrix: |
Not Specified |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Bioassessments were done by the San Diego Regional Water Quality Control Board in 1998 and 1999. Physical habitat scores and BMI ranking scores were given to each sampling site. Relative to other waterbodies in the study, the Tecolote Creek had medium to high physical habitat quality. Relative to the other sampled waterbodies, the BMI ranking for the Tecolote Creek site for 11/1998 was around average, but was well below average for 05/1999. (SDRWQCB, 1999A). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
|
| Objective/Criterion Reference: |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected in Tecolote Creek, 5 riffles upstream of Gardena Av. and Cross St. |
| Temporal Representation: |
Sampling occurred in 11/1998 and 05/1999. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5112 |
| |
| Pollutant: |
Oil and Grease |
| Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
This pollutant is being considered for placement on the section 303(d) list under section 3.1 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. Seven of nine samples exceeded the detection limits for oil & grease, for which there is not a 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. Seven of nine samples exceeded the detection limits for oil & grease, for which there is not a water quality objective, and this does not exceed 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. |
| |
| 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 it cannot be determined if applicable water quality standards are not being exceeded. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5112 |
| |
| LOE ID: |
3329 |
| |
| Pollutant: |
Oil and Grease |
| LOE Subgroup: |
Pollutant-Nuisance |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Non-Contact Recreation |
| |
| Number of Samples: |
9 |
| Number of Exceedances: |
7 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
Data were collected by the City of San Diego from 11/1997 to 03/2000. Seven of 9 samples showed a measurable amount (0.5 mg/L or higher) of oil and grease (SWRCB, 2003). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for oil and grease says, "Waters shall not contain oils, greases, waxes, or other materials in concentrations which result in a visible film or coating on the surface of the water or on objects in the water, or which cause nuisance or which otherwise adversely affect beneficial uses." |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Tecolote Creek site SD5. The exact location of this site was not reported. |
| Temporal Representation: |
Samples were collected from 11/1997 to 03/2000. Two to 3 samples were collected per year. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5171 |
| |
| Pollutant: |
Total Dissolved Solids |
| Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| 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. Four of nine of the samples exceed the Basin Plan water quality objective for TDS.
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. Four of nine of the samples exceed the Basin Plan water quality objective 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. |
| |
| 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. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5171 |
| |
| LOE ID: |
3331 |
| |
| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total Dissolved |
| |
| Beneficial Use: |
Non-Contact Recreation |
| |
| Number of Samples: |
9 |
| Number of Exceedances: |
4 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data was collected by the City of San Diego from 11/1997 to 03/2000. Four of 9 samples were in exceedance (SWRCB, 2003). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for TDS is 500 mg/L. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Tecolote Creek site SD5. The exact location of this site was not recorded. |
| Temporal Representation: |
Samples were collected from 11/1997 to 03/2000. Two to 3 samples were collected per year. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5111 |
| |
| Pollutant: |
pH |
| Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| 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. One of 15 of the samples exceed the Basin Plan water quality objective for pH.
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. One of 15 of the samples exceed the Basin Plan water quality objective for pH 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. |
| |
| 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. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5111 |
| |
| LOE ID: |
3328 |
| |
| Pollutant: |
pH |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Non-Contact Recreation |
| |
| Number of Samples: |
15 |
| Number of Exceedances: |
1 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by the City of San Diego from 11/1997 to 03/2000. One of 15 samples, collected in the field and laboratory, was in exceedance. It was a field pH sample, reading 6.49 (SWRCB, 2003). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for pH is 6.5 (minimum) to 8.5 (maximum). |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Tecolote Creek site SD5. Location of this site was not reported. |
| Temporal Representation: |
Samples were collected from 11/1997 to 03/05/2000. Samples were collected 2-3 times per year. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5969 |
| |
| Pollutant: |
Cadmium |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5969 |
| |
| LOE ID: |
4734 |
| |
| Pollutant: |
Cadmium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| 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): |
| |
DECISION ID |
6008 |
| |
| Pollutant: |
Copper |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 6008 |
| |
| LOE ID: |
4735 |
| |
| Pollutant: |
Copper |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| 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): |
| |
DECISION ID |
6009 |
| |
| Pollutant: |
Indicator Bacteria |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2009 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 6009 |
| |
| LOE ID: |
4736 |
| |
| Pollutant: |
Indicator 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: |
PATHOGEN MONITORING |
| 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): |
| |
DECISION ID |
6010 |
| |
| Pollutant: |
Lead |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 6010 |
| |
| LOE ID: |
4737 |
| |
| Pollutant: |
Lead |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| 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): |
| |
DECISION ID |
5170 |
| |
| Pollutant: |
Phosphorus |
| 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 |
| |
| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under this section 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. Nine of 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 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. All nine samples exceeded the phosphorus 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: |
No new data were assessed for 2008. The decision has not changed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5170 |
| |
| LOE ID: |
3330 |
| |
| Pollutant: |
Phosphorus |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Non-Contact Recreation |
| |
| Number of Samples: |
9 |
| Number of Exceedances: |
9 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by the City of San Diego from 11/1997 to 03/2000. Nine of 9 samples were in exceedance. |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters-streams and other flowing waters with all beneficial uses, the WQO for total phosphorus is 0.1 mg/L. This appears to be the desired goal in order to prevent plant nuisance in streams and other flowing waters; not to be exceeded more than 10% of the time. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected in Tecolote Creek at site SD5. The exact location of this site is unknown. |
| Temporal Representation: |
Samples were collected from 11/1997 to 03/2000. 2-3 samples were collected per year. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
6011 |
| |
| Pollutant: |
Toxicity |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 6011 |
| |
| LOE ID: |
4738 |
| |
| Pollutant: |
Toxicity |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| 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): |
| |
DECISION ID |
5231 |
| |
| Pollutant: |
Turbidity |
| 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: |
Unknown Nonpoint Source | Unknown Point Source | Urban Runoff/Storm Sewers |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
One lines of evidence are available in the administrative record to assess this pollutant. Seven of nine of samples exceed the Basin Plan water quality objective for turbidity.
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. Seven of nine of samples exceed the Basin Plan water quality objective for turbidity 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. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5231 |
| |
| LOE ID: |
3332 |
| |
| Pollutant: |
Turbidity |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Non-Contact Recreation |
| |
| Number of Samples: |
9 |
| Number of Exceedances: |
7 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by the City of San Diego from 11/1997 to 03/2000. Seven of 9 samples were in exceedance. |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters and all beneficial uses, the WQO for turbidity is 20 ntu. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Tecolote Creek site SD5. The location of this site is unknown. |
| Temporal Representation: |
Samples were collected from 11/1997 to 03/2000. Two to 3 samples were collected per year. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
6012 |
| |
| Pollutant: |
Zinc |
| 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: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. This is a placeholder decision for a 303(d) listing made in a previous assessment cycle. The Regional Boards will update this decision when new data and information become available and are assessed. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 6012 |
| |
| LOE ID: |
4739 |
| |
| Pollutant: |
Zinc |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| 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): |