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DECISION ID |
6247 |
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| Pollutant: |
Indicator 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: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
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| 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 this pollutant.
LOE 3426 was disassociated from this decision because LOE 27736, 27749, and 27752 encompassed the data from the older LOE in addition to including newer data.
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. 31 of 70 samples at Colorado Lagoon north, 37 of 71 samples at Colorado Lagoon south, and 24 of 71 samples at Colorado Lagoon center exceeded the updated geometric mean bacteria objectives and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. Additionally, 72 of 325 samples at Colorado Lagoon south and 64 or 324 samples at Colorado Lagoon center exceeded the single sample 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. |
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| RWQCB Board Decision / Staff Recommendation: |
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be 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: |
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| USEPA Decision: |
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| LOE ID: |
27736 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
70 |
| Number of Exceedances: |
31 |
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| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
31 out of 70 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 72 out 325 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health . |
| Data Reference: |
The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon. |
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| Water Quality Objective/Criterion: |
The Basin Plan bacteria objectives state that to protect water contact recreation in marine waters individual samples shall not exceed the following limits: the total coliform density shall not exceed 10000/100 ml; the fecal coliform density shall not exceed 400/100 ml; the enterococcus density shall not exceed 104/100 ml; and the total coliform density shall not exceed 1,000/100 ml, if the ratio of fecal-to-total coliform exceeds 0.1 as single samples. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the total coliform density shall not exceed 1000/100 ml, the fecal coliform density shall not exceed 200/100 ml, and the enterococcus density shall not exceed 35/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
The City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-24 located in the south end of the lagoon. |
| Temporal Representation: |
Grab samples were taken and analyzed on a weekly basis from April 2001 to January 2007. |
| Environmental Conditions: |
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| QAPP Information: |
Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance. |
| QAPP Information Reference(s): |
Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services |
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California Code of Regulations Title 17, sections 7958-7960. |
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| LOE ID: |
27752 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
71 |
| Number of Exceedances: |
24 |
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| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
24 out of 71 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 64 out 324 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health . |
| Data Reference: |
The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon. |
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| Water Quality Objective/Criterion: |
The Basin Plan bacteria objectives state that to protect water contact recreation in marine waters individual samples shall not exceed the following limits: the total coliform density shall not exceed 10000/100 ml; the fecal coliform density shall not exceed 400/100 ml; the enterococcus density shall not exceed 104/100 ml; and the total coliform density shall not exceed 1,000/100 ml, if the ratio of fecal-to-total coliform exceeds 0.1 as single samples. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the total coliform density shall not exceed 1000/100 ml, the fecal coliform density shall not exceed 200/100 ml, and the enterococcus density shall not exceed 35/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
The City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-26 located in the center of the lagoon. |
| Temporal Representation: |
Grab samples were taken and analyzed on a weekly basis from April 2001 to February 2007. |
| Environmental Conditions: |
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| QAPP Information: |
Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance. |
| QAPP Information Reference(s): |
Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services |
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California Code of Regulations Title 17, sections 7958-7960. |
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| LOE ID: |
27749 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
71 |
| Number of Exceedances: |
37 |
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| Data and Information Type: |
Other Agencies/Organizations provided monitoring data |
| Data Used to Assess Water Quality: |
37 out of 71 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 87 out 337 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health . |
| Data Reference: |
The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon. |
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| Water Quality Objective/Criterion: |
The Basin Plan bacteria objectives state that to protect water contact recreation in marine waters individual samples shall not exceed the following limits: the total coliform density shall not exceed 10000/100 ml; the fecal coliform density shall not exceed 400/100 ml; the enterococcus density shall not exceed 104/100 ml; and the total coliform density shall not exceed 1,000/100 ml, if the ratio of fecal-to-total coliform exceeds 0.1 as single samples. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the total coliform density shall not exceed 1000/100 ml, the fecal coliform density shall not exceed 200/100 ml, and the enterococcus density shall not exceed 35/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018. |
| Objective/Criterion Reference: |
Water Quality Control Plan Los Angeles Region R4 Basin Plan |
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Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
The City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-25 located in the north end of the lagoon. |
| Temporal Representation: |
Grab samples were taken and analyzed on a weekly basis from April 2001 to February 2007. |
| Environmental Conditions: |
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| QAPP Information: |
Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance. |
| QAPP Information Reference(s): |
Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services |
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California Code of Regulations Title 17, sections 7958-7960. |