| |
DECISION ID |
17893 |
| |
| 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.
One line of evidence is available in the administrative record to assess this indicator. 10 of 10 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. 10 of 10 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: |
26716 |
| |
| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Adverse Biological Responses |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
3 |
| Number of Exceedances: |
3 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Three samples of IBI data were taken from May 2001 to May 2002 at one sampling site. All three 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: ENC-GVR on Encinitas Creek. |
| Temporal Representation: |
Sampling occurred during May and October in 2001 and on May 2002. |
| 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: |
26383 |
| |
| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Adverse Biological Responses |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
7 |
| Number of Exceedances: |
7 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Seven samples of IBI data were taken from May 1998 to May 2000 at two sampling sites. All seven of the 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. |
| 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 two sites: 904ENCGVR and 904ENCRSF on Encinitas Creek. |
| Temporal Representation: |
Sampling occurred during one to three events from May 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 |
16710 |
| |
| Pollutant: |
Nitrogen |
| 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 |
| |
| Weight of Evidence: |
This pollutant is being considered for placement on the section 303(d) list under sections 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. Two of the 4 samples exceed the Basin Plan water quality objective for total nitrogen as N.
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 the 4 samples exceed the Basin Plan water quality objective for total nitrogen as N and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of five samples is needed for application of table 3.2.
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 16710 |
| |
| LOE ID: |
6526 |
| |
| Pollutant: |
Total Nitrogen as N |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
2 |
| |
| Data and Information Type: |
Fixed station physical/chemical monitoring (conventional pollutants only) |
| Data Used to Assess Water Quality: |
Two of four samples collected at Encinitas Creek show excessive nitrogen concentrations according to results in California's Surface Water Ambient Monitoring Program Report, 2007. |
| 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: |
Water samples were collected at Encinitas Creek station 2, 904CBENC2; (Latitude 33.06824, Longitude -117.262515) |
| Temporal Representation: |
Water samples were collected in March, April, June and September 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 |
16411 |
| |
| 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: |
Source Unknown |
| Expected TMDL Completion Date: |
2019 |
| 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. Four of the four samples exceed the CTR criteria 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. Four of the four samples exceed the CTR value 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 16411 |
| |
| LOE ID: |
6523 |
| |
| Pollutant: |
Selenium |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Dissolved |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
4 |
| |
| Data and Information Type: |
Fixed station physical/chemical monitoring (conventional pollutants only) |
| Data Used to Assess Water Quality: |
All four samples collected at Encinitas Creek show 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). |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
CTR Freshwater Chronic (CCC) 5 ug/L. (U.S. EPA, 2000). |
| 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 Encinitas Creek station 2, 904CBENC2; (Latitude 33.06824, Longitude -117.262515). |
| Temporal Representation: |
Samples were collected in March, April, June and September 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 |
16410 |
| |
| Pollutant: |
Toxicity |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
New Decision |
| Revision Status |
Revised |
| 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 placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 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. Five of the eight samples exceed the water quality objective for toxicity.
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. Five of the eight samples exceed the Basin Plan objective for tocixity 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 16410 |
| |
| LOE ID: |
21383 |
| |
| Pollutant: |
Toxicity |
| LOE Subgroup: |
Toxicity |
| Matrix: |
Water |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
3 |
| |
| Data and Information Type: |
Ambient toxicity testing (chronic) |
| Data Used to Assess Water Quality: |
Four samples were collected at Encinitas Creek station 904CBENC2 from March 2002 to September 2002. The samples showed significant toxicity levels (SL) in the following tests: Selenastrum algae growth test - one of the four samples was toxic. Ceriodaphnia dubia survival/reproductive test - three of the four samples showed toxicity. The tests results can be found 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: |
From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
According to SWAMP, waters are considered toxic when samples show significant toxicity levels (SWAMP code SL) when compared to a negative control. Significant toxicity is determined when statistical tests result in an alpha of less than 5% and percent control values less than the evaluation threshold (EPA, 2002). |
| Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
| |
| Spatial Representation: |
Water Toxicity Samples were collected at Encinitas Creek station 2 (904CBENC2); (Latitude 33.0682, Longitude -117.2625). |
| Temporal Representation: |
Samples were collected in March, April, June and September 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. |
|
| |
| LOE ID: |
26382 |
| |
| Pollutant: |
Sediment Toxicity |
| LOE Subgroup: |
Toxicity |
| Matrix: |
Sediment |
| Fraction: |
None |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
2 |
| |
| Data and Information Type: |
Ambient toxicity testing (chronic) |
| Data Used to Assess Water Quality: |
Four samples were collected at Encinitas Creek station 904CBENC2 from March 2002 to September 2002. The samples showed significant toxicity levels (SL) in the following test: Hyalella azteca sediment toxicity. Two of four samples exhibited toxicity. The tests results can be found 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: |
From the Basin Plan, all waters shall be free of toxic substances that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
| Objective/Criterion Reference: |
Water Quality Control Plan for the San Diego Basin (9). |
| |
| Evaluation Guideline: |
According to SWAMP, waters are considered toxic when samples show significant toxicity levels (SWAMP code SL) when compared to a negative control. Significant toxicity is determined when statistical tests result in an alpha of less than 5% and percent control values less than the evaluation threshold (EPA, 2002). |
| Guideline Reference: |
Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013 |
| |
| Spatial Representation: |
Water Toxicity Samples were collected at Encinitas Creek station 2 (904CBENC2); (Latitude 33.0682, Longitude -117.2625). |
| Temporal Representation: |
Samples were collected in March, April, June and September 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 |
5808 |
| |
| 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 staff findings that the two lines of evidence in the record to assess this pollutant consists of bioassessment data. This information on its own is insufficient to determine with the confidence and power required by the Listing Policy since Section 3.9 of the policy states that this data must be associated with numerical water quality data. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The decision has not changed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB 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 exceeded. |
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5808 |
| |
| LOE ID: |
3191 |
| |
| Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
| LOE Subgroup: |
Population/Community Degradation |
| Matrix: |
Not Specified |
| Fraction: |
None |
| |
| Beneficial Use: |
Agricultural Supply |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Data were collected for the San Diego Water Quality Control Board 1999 Biological Assessment Annual Report. Physical habitat scores for EC-GVR ranged from 104 to 116, moderate compared to other sampled waterbodies. BMI scores at EC-GVR were all below average. (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 at Encinitas Creek, 5 riffles downstream of Green Valley Road (EC-GVR). |
| Temporal Representation: |
Samples were collected in May, September, November 1998 and May 1999. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
|
| |
| LOE ID: |
3192 |
| |
| Pollutant: |
Benthic-Macroinvertebrate Bioassessments |
| LOE Subgroup: |
Population/Community Degradation |
| Matrix: |
Not Specified |
| Fraction: |
None |
| |
| Beneficial Use: |
Agricultural Supply |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Benthic macroinvertebrate surveys |
| Data Used to Assess Water Quality: |
Data were collected by the Stream Team in 1999. Taxa richness was 5. There were 0 EPT taxa. Tolerance value was 2.9. Feeding groups were 64.3% collectors and 7.1% predators. Other feeding groups were not reported. (Stream Team, 2001). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
|
| Objective/Criterion Reference: |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Encinitas Creek. Exact sampling location was not reported. |
| Temporal Representation: |
Samples were collected in the Fall of 1999. |
| Environmental Conditions: |
|
| QAPP Information: |
QA Info Missing |
| QAPP Information Reference(s): |
| |
DECISION ID |
5380 |
| |
| Pollutant: |
Diazinon |
| 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.
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. None of 4 samples exceeded the CDFG Aquatic Life Hazard Assessment Criteria 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: |
No new data were assessed for 2008. The decision has not changed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded. |
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5380 |
| |
| LOE ID: |
3194 |
| |
| Pollutant: |
Diazinon |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Not Recorded |
| |
| Beneficial Use: |
Warm Freshwater Habitat |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Of the four water samples, none of the samples were exceeding. (SWAMP, 2004). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
No individual pesticides or combination of pesticides shall be present in the water column, sediments, or biota at concentrations that adversely affect beneficial uses. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
CDFG Aquatic Life Hazard Assessment Criteria 1-hour averave 0.16 ug/L (Siepman & Finlayson, 2000; Finlayson, 2004). |
| Guideline Reference: |
Placeholder reference 2006 303(d) |
| |
| Spatial Representation: |
One station at Encinitas Creek: 33.06828 -117.26261. |
| Temporal Representation: |
Samples were collected from March through September of 2002. |
| Environmental Conditions: |
San Marcos Creek Watershed 904.51. |
| QAPP Information: |
SWAMP Quality Assurance Plan. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5806 |
| |
| 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: |
One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy.
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. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The decision has not changed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB 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 exceeded. |
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5806 |
| |
| LOE ID: |
3189 |
| |
| Pollutant: |
Total Dissolved Solids |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Unknown |
| Fraction: |
Total |
| |
| Beneficial Use: |
Agricultural Supply |
| |
| Number of Samples: |
1 |
| Number of Exceedances: |
1 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by RWQCB9 in 1998. One sample was collected, it was 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. This concentration is not to be exceeded more than 10% of the time during any one year period. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Encinitas Creek at Green Valley Road. |
| Temporal Representation: |
Samples were collected on 06/03/1998. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |
| |
DECISION ID |
5807 |
| |
| Pollutant: |
Turbidity |
| 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: |
One line of evidence is available in the administrative record to assess this pollutant. A single sample was collected and it did not exceed the Basin Plan criteria, but the number of samples is insufficient to determine with the confidence and power required by the Listing Policy.
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. |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The decision has not changed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB 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 exceeded. |
| |
| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 5807 |
| |
| LOE ID: |
3190 |
| |
| Pollutant: |
Turbidity |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
Total |
| |
| Beneficial Use: |
Agricultural Supply |
| |
| Number of Samples: |
1 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by RWQCB9 in 1998. One sample was collected and was not 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 turbidity is 20 ntu. This concentration is not to be exceeded more than 10% of the time during any one year period. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Samples were collected at Encinitas Creek at Green Valley Rd. |
| Temporal Representation: |
Samples were collected on 06/03/1998. |
| Environmental Conditions: |
|
| QAPP Information: |
Data used in 2002 assessment. |
| QAPP Information Reference(s): |