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Development of Sediment Quality Objectives for California Bays and Estuaries

Development of Sediment Quality Objectives for California Bays and Estuaries. Steven Bay Southern California Coastal Water Research Project (SCCWRP) steveb@sccwrp.org. Project Update. Primary Tasks. Planning and technical review Database development

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Development of Sediment Quality Objectives for California Bays and Estuaries

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  1. Development of Sediment Quality Objectives for California Bays and Estuaries Steven Bay Southern California Coastal Water Research Project (SCCWRP) steveb@sccwrp.org Project Update

  2. Primary Tasks • Planning and technical review • Database development • Benthic community assessment tool development • Effects assessment and analysis • Sediment quality objectives development • Implementation program • Sediment quality summary

  3. Science Team • SCCWRP • San Francisco Estuary Institute (SFEI) • Moss Landing Marine Laboratories (MLML) • Marine Pollution Studies Laboratory (MPSL) • EXA Data and Mapping • Other consultants for specific elements • Statistical analysis • Bioaccumulation modeling

  4. Schedule • January 2003: Project start Workplan development Database creation • June 2003: Adopt workplan Benthic assessment tool development Data analyses Limited field sampling • August 2005: Draft SQOs for review Guidance development Additional analyses (respond to comments) Summary of sediment quality • February 2007: Adopt SQOs

  5. Progress to Date • Planning and technical review • Database development • Benthic community assessment tool development • Effects assessment and analysis • Sediment quality objectives development • Implementation program • Sediment quality summary

  6. Database Development • Statewide sediment quality database • Foundation for analyses to develop and verify proposed SQOs • Build upon ongoing efforts by CSTF, SCCWRP, other agencies • Sediment chemistry, toxicity, benthic community, and bioaccumulation data • Monitoring, dredging permits, special studies • Available to public • Resource for other projects

  7. Database Update • Revised data format to accommodate bioaccumulation data and simplify structure • Incorporating additional data • San Diego Bay • Newport Bay • San Francisco Bay • Evaluation of additional San Francisco Bay data for inclusion (SFEI) • Dredging studies • Military base clean up studies • Richmond Harbor and airport expansion studies

  8. Benthic Community Assessment Tool Development • Benthic macrofauna represent most sensitive aquatic species • Data interpretation is complex and subject to confounding factors • Assessment tools based on multiple species/metrics needed • Approach: • Refine So. Calif. Benthic Response Index (BRI) • Develop tools for other regions of State • Compare/standardize sampling methods

  9. Benthic Community Assessment Tool Development Update • Refine southern California BRI • Coordination with Bight’03 survey • Collected samples from areas of expected high impact

  10. Benthic Community Assessment Tool Development Update • Develop and harmonize assessment tool for San Francisco Bay • Joint effort with SFEI • Assembled database for evaluation of southern Calif. and S.F. Bay assessment methods • Bight’98, EMAP, BPTCP, NOAA • RMP, BADA , Dept. Water Resources • Moss Landing Marine Labs • Comparison of assessment tools will follow completion of taxonomic standardization of database

  11. Implementation Program • Guidance for use of SQOs • Assessment (e.g., 303(d) listing) • Discharge regulations • Sediment cleanup • Multiple vs. single lines of evidence • Guidance for monitoring and assessment studies • Methods manuals for sampling and analysis • Enforcement policy

  12. Implementation program • Initiated development of application framework • Outline of proposed topics • Evaluating candidate chronic sediment toxicity test methods • 15 stations from So. Calif. and S.F. Bay • 5 methods will be compared to acute amphipod toxicity, chemistry, and benthos • Amphipod growth and reproduction • Polychaete growth • Copepod reproduction • Juvenile clam growth • Mussel embryo development • Testing in progress

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