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 Harbor Island (West Basin)
Water Body ID: CAB9081000020020306104110
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. Eight of 10 samples exceeded the 3.1 ppb CTR chronic saltwater 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 5117
LOE ID: 324
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
Beneficial Use: Estuarine Habitat
Number of Samples: 10
Number of Exceedances: 8
Data Used to Assess Water Quality: Data were collected by the RWQCB in 03/2004. Eight of 10 samples were in exceedance of the chronic standards. The samples collected between piers 24 and 25 were in exceedance of chronic criteria and samples collected in the main channel were not in exceedance. The sample collected at mid-channel, south of Tom Ham's was not in exceedance of the chronic standard (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 at San Diego Bay at Harbor Island in the West Basin at the innermost location near the fence between the park and hotel, between piers 6 and 7, between piers 12 and 13, between piers 18 and 19, between piers 24 and 25, and in the main channel outside of Harbor Island West.

On 03/20/2004 a sample was collected at Harbor Island West mid-channel, south of Tom Ham's.
Temporal Representation: Samples were collected on 03/15/2004.

One sample was also collected on 03/20/2004.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):