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Appendix 5F – San Diego County Municipal Copermittees Sediment Monitoring Plan

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Appendix 5F – San Diego County Municipal Copermittees Sediment Monitoring Plan Appendix 5F – San Diego County Municipal Copermittees Sediment Monitoring Plan San Diego County Municipal Copermittees Sediment Monitoring Plan-Final Prepared For: County of San Diego Municipal Copermittees November 2014 San Diego County Municipal Copermittees Sediment Monitoring Plan-Final Prepared For: County of San Diego Municipal Copermittees Prepared By: Weston Solutions, Inc. 5817 Dryden Place, Suite 101 Carlsbad, California 92008 November 2014 San Diego County Municipal Copermittees Sediment Monitoring Plan-Final November 2014 TABLE OF CONTENTS 1.0 INTRODUCTION .............................................................................................................. 1 1.1 Background ............................................................................................................. 1 1.2 Monitoring Objective .............................................................................................. 2 2.0 MATERIALS AND METHODS ........................................................................................ 3 2.1 Field Collection Program ........................................................................................ 3 Station Selection .......................................................................................... 3 Permitting .................................................................................................... 4 Monitoring Season and Frequency .............................................................. 4 Sampling Vessels ........................................................................................ 4 Navigation ................................................................................................... 4 Sediment Sampling and Handling ............................................................... 5 Documentation of Chain-of-Custody .......................................................... 6 2.2 Laboratory Testing .................................................................................................. 7 Physical and Chemical Analysis ................................................................. 7 Toxicity Testing .......................................................................................... 9 Benthic Infauna Analysis .......................................................................... 14 3.0 DATA REVIEW, MANAGEMENT, AND ANALYSIS................................................. 16 3.1 Data Review and Management ............................................................................. 16 3.2 Data Analysis ........................................................................................................ 16 Sediment Toxicity ..................................................................................... 16 Sediment Chemistry .................................................................................. 17 Benthic Community Condition ................................................................. 17 Integration of Multiple Lines of Evidence ................................................ 18 4.0 STRESSOR IDENTIFICATION ...................................................................................... 22 Pollutant Confirmation and Characterization ............................................ 22 Pollutant Identification .............................................................................. 23 Pollutant Source Identification and Management ..................................... 23 5.0 REPORTING .................................................................................................................... 24 6.0 SCHEDULE ...................................................................................................................... 24 7.0 REFERENCES ................................................................................................................. 26 Weston Solutions, Inc. i San Diego County Municipal Copermittees Sediment Monitoring Plan-Final November 2014 APPENDICES A Water Quality Control Plan for Enclosed Bays and Estuaries - Part 1 Sediment Quality B Sediment Monitoring Plan QAPP LIST OF TABLES Table 2-1. Chemical and Physical Parameters for Sediment Samples .......................................... 8 Table 2-2. Summary of Conditions for 10-Day Whole Sediment Amphipod Bioassay ............... 11 Table 2-3. Test Conditions for the 48-Hour M. galloprovincialis Sediment-Water Interface Bioassay ............................................................................................................. 12 Table 2-4. Test Conditions for the 28-Day Whole Sediment N. arenaceodentata Bioassay ....... 14 Table 3-1. Sediment Toxicity Categorization Values ................................................................... 17 Table 3-2. Sediment Chemistry Guideline Categorization ........................................................... 17 Table 3-3. Benthic Index Categorization Values for Southern California Marine Bays .............. 18 Table 3-4. Determination of Severity of Biological Effects ......................................................... 19 Table 3-5. Determination of Potential for Chemically Mediated Effects ..................................... 19 Table 3-6. Determination of Final Station Assessment ................................................................ 20 Table 6-1. Sediment Monitoring Plan Schedule ........................................................................... 24 LIST OF FIGURES Figure 3-1. Flow Chart of Actions Following Station Assessment .............................................. 21 Weston Solutions, Inc. ii San Diego County Municipal Copermittees Sediment Monitoring Plan-Final November 2014 ACRONYMS AND ABBREVIATIONS ASTM American Society for Testing and Materials AVS:SEM acid-volatile sulfides and simultaneously extracted metals Bight Southern California Bight Regional Monitoring Program BRI Benthic Response Index CA EPA California Environmental Protection Agency CA LRM California Logistic Regression Model CEDEN California Environmental Data Exchange Network CDFW California Department of Fish and Wildlife COC chain-of-custody Copermittees San Diego Regional Copermittees CSI Chemical Score Index DDE dichlorodiphenyldichloroethylene DDT dichlorodiphenyltrichloroethane DGPS Differential Global Positioning System DO dissolved oxygen DTCS Department of Toxic Substances Control EC50 median effective concentration IBI Index of Biotic Integrity ID inner diameter LC50 median lethal concentration LOE line of evidence MgSO4 magnesium sulfate MLOE multiple lines of evidence MS4 Municipal Separate Storm Sewer System MW molecular weight NPDES National Pollutant Discharge Elimination System OEHHA Office of Environmental Health Hazard Assessment PAHs polycyclic aromatic hydrocarbons PCBs polychlorinated biphenyls pH hydrogen ion concentration PMAX maximum probability model QA quality assurance QA/QC quality assurance/quality control QAMP Quality Assurance Management Plan QAPP Quality Assurance Project Plan QC quality control RBI Relative Benthic Index RIVPACS River Invertebrate Prediction and Classification System RL Reporting Limit RWQCB Regional Water Quality Control Board SCAMIT Southern California Association of Marine Invertebrate Taxonomists SDRWQCB San Diego Regional Water Quality Control Board SOPs Standard Operating Procedures SPME solid phase microextraction SQOs Sediment Quality Objectives Weston Solutions, Inc. iii San Diego County Municipal Copermittees Sediment Monitoring Plan-Final November 2014 SWAMP Surface Water Ambient Monitoring Program SWRCB State Water Resources Control Board TIE toxicity identification evaluation TMDL Total Maximum Daily Load TOC total organic carbon USEPA United States Environmental Protection Agency WQIP Water Quality Improvement Plan UNITS OF MEASURE cm centimeter °C degrees Celsius ft feet or foot L liter m2 square meters µg/kg microgram per kilogram mg milligram mg/kg milligram per kilogram mg/L milligram per liter mL milliliter mm millimeter ppt parts per thousand % percent Weston Solutions, Inc. iv San Diego County Municipal Copermittees Sediment Monitoring Plan-Final November 2014 1.0 INTRODUCTION The San Diego County Regional Copermittees (Copermittees) are required to conduct sediment quality monitoring in accordance with the requirements of the San Diego Regional Water Quality Control Board (RWQCB) Order No. R9-2013-0001 (Permit), effective June 27, 2013. The Copermittees are required either individually, in association with multiple Copermittees, or through participation in a water body monitoring coalition to perform sediment quality monitoring to assess compliance with the sediment quality receiving water limits applicable to MS4 discharges to enclosed bays and estuaries. Provision D.1.e.(2) of the Permit requires the Copermittees to develop a Sediment Monitoring Plan for incorporation into the Water Quality Improvement Plan (WQIP) which satisfies the requirements of the Water Quality Control Plan for Enclosed Bays and Estuaries of California – Part I Sediment Quality (Sediment Control Plan; State Water Quality Control Board [SWRCB] and California Environmental Protection Agency [CA EPA], 2009; see Appendix A). Provision D.1.e.(1)(b) of the Permit also requires the Copermittees to participate in the Southern California Bight Regional Monitoring Program (Bight). The Bight Program occurs every five years and consists of a partnership of multiple local, state, and federal agencies collaborating to address management questions of regional importance regarding offshore,
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