Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name: San Diego Bay Shoreline, at Marriott Marina
Water Body ID: CAB9082100020020307102410
Water Body Type: Bay & Harbor
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: 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. A large number 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 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 4 samples exceeded the 3.1 ppb dissolved CTR chronic criteria 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: 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 5119
LOE ID: 327
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
Beneficial Use: Estuarine Habitat
Number of Samples: 4
Number of Exceedances: 3
Data Used to Assess Water Quality: Data were collected by the RWQCB in 03/2004. Three of 4 samples were in exceedance of the chronic criteria. All samples in exceedance were collected in the Marina. The samples collected in the main channel were not in exceedance of the chronic criteria (SDRWQCB, 2004c).
Data Reference: Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: From the CTR: the dissolved copper chronic criterion is 3.1 ppb and the acute criterion is 4.8 ppb.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation: Samples were collected in the San Diego Bay at the Marriott Marina and in the Marriott Marina Main Channel. Samples collected at the marina were collected on the west and east sides of the marina and in the middle.
Temporal Representation: Samples were collected on 03/115/2004.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):