Addendum to Drayton Harbor Watershed Fecal Coliform TMDL and Phase 3 Microbial Source Tracking; Semiahmoo Bay

Addendum to Drayton Harbor Watershed Fecal Coliform TMDL and Phase 3 Microbial Source Tracking; Semiahmoo Bay

Addendum to Drayton Harbor Watershed Fecal Coliform TMDL and Phase 3 Microbial Source Tracking; Semiahmoo Bay July 2010 Prepared for: Nooksack Indian Tribe Department of Natural Resources Deming Washington Prepared by: Hirsch Consulting Services Lummi Island, Washington (360)-758-4046 (hirschserv@aol.com) Llyn Doremus Nooksack Indian Tribe, Department of Natural Resources Deming, Washington (360)-592-5176 (ldoremus@nooksack-nsn.gov) Geoff Menzies Puget Sound Restoration Fund Ferndale Washington (360)-384-9135 (geoffmenzies@comcast.net) i Contents LIST OF TABLES .................................................................................................................................................. III LIST OF FIGURES ................................................................................................................................................ IV ACKNOWLEDGEMENTS ..................................................................................................................................... IV ABSTRACT .......................................................................................................................................................... V BACKGROUND ................................................................................................................................................... 1 GOAL AND OBJECTIVES ...................................................................................................................................... 2 PROJECT GOAL .............................................................................................................................................................. 2 OBJECTIVES ................................................................................................................................................................... 3 STUDY DESIGN ................................................................................................................................................... 3 Fresh Water Shoreline Surveys .............................................................................................................................. 4 Ebb Tide Flows from Cain Creek ............................................................................................................................ 5 Flood Tide circulation characterization ................................................................................................................. 6 DATA COLLECTION AND ANALYSES METHODS .................................................................................................... 7 FIELD PROCEDURES AND SAMPLE HANDLING ....................................................................................................................... 7 Water Quality Sample Collection .......................................................................................................................... 7 Water Quality Parameter Measurements ............................................................................................................ 7 Stream Flow Measurements ................................................................................................................................. 7 Drogue tracking for Tidal Circulation Characterization ........................................................................................ 8 ANALYTICAL METHODS .................................................................................................................................................... 8 DATA QUALITY ................................................................................................................................................... 9 METHOD QUALITY OBJECTIVES ......................................................................................................................................... 9 REPRESENTATIVENESS ................................................................................................................................................... 12 COMPARABILITY ........................................................................................................................................................... 12 COMPLETENESS............................................................................................................................................................ 13 DATA ASSESSMENT, REPORTING, AND AUDITS ................................................................................................................... 13 RESULTS AND DISCUSSION ................................................................................................................................ 13 WATER QUALITY STANDARDS ......................................................................................................................................... 13 FIELD CONDITIONS ....................................................................................................................................................... 14 FRESHWATER: SHORELINE SURVEYS AND TRIBUTARIES ......................................................................................................... 15 Cain Creek and Cain Creek Storm Drain .............................................................................................................. 16 Semiahmoo Bay East Shore Storm Drains ........................................................................................................... 17 Semiahmoo Spit .................................................................................................................................................. 17 Fecal Coliform Loads ........................................................................................................................................... 18 TEMPERATURE, DISSOLVED OXYGEN AND CONDUCTIVITY ..................................................................................................... 18 MARINE: EBB AND FLOOD TIDE FECAL COLIFORM BACTERIA AND FLOW CHARACTERIZATION ..................................................... 21 MICROBIAL SOURCE TRACKING ANALYSES ......................................................................................................................... 24 ii CONCLUSIONS ................................................................................................................................................... 27 REFERENCES ...................................................................................................................................................... 29 FIGURES ............................................................................................................................................................ 31 APPENDIX A: PROJECT DATA ............................................................................................................................ 32 APPENDIX B: TECHNICAL WORK GROUP MEETING SUMMARY ........................................................................... 33 APPENDIX C: RECOMMENDATIONS ................................................................................................................... 38 APPENDIX D: ADDENDUM TO DRAYTON HARBOR WATERSHED FECAL COLIFORM TMDL; PHASE I, WATER QUALITY STUDY DESIGN: QUALITY ASSURANCE PROJECT PLAN.......................................................................... 40 APPENDIX E: MARINE DROGUE STUDIES MAP DATA .......................................................................................... 41 List of Tables TABLE 1. SHORELINE SURVEY DATA COLLECTION SITES. ............................................................................................... 6 TABLE 2. SUMMARY OF WATER QUALITY ANALYSES METHODS AND SAMPLE HANDLING. ......................................... 9 TABLE 3. METHOD QUALITY OBJECTIVES FOR FIELD AND LABORATORY ANALYSES ................................................... 10 TABLE 4. PRECISION RESULTS FOR SAMPLE REPLICATES COMPARED WITH METHOD QUALITY OBJECTIVES. ........... 11 TABLE 5. WASHINGTON STATE WATER QUALITY STANDARDS FOR FECAL COLIFORM BACTERIA DESIGNATED FOR SEMIAHMOO BAY AND ITS TRIBUTARIES. ........................................................................................................... 14 TABLE 7. FECAL COLIFORM BACTERIA SUMMARY FOR FRESHWATER DISCHARGES. .................................................. 16 TABLE 8. SHORELINE SURVEY SITES RANKED BY AVERAGE LOADING ......................................................................... 18 TABLE 9. SHORELINE SURVEY RESULTS SUMMARY FOR TEMPERATURE, DISSOLVED OXYGEN AND CONDUCTIVITY. 20 TABLE 10. EASTERN NEAR-SHORE SEMIAHMOO BAY FECAL COLIFORM MEASURED DURING DROGUE AND FLOAT TRACKING FOR EBB TIDE AND FLOOD TIDE FLOW CHARACTERIZATION. ........................................................... 23 TABLE 11. ESTIMATED DROGUE AND FLOAT TRACKING SPEED (MPH) AND DIRECTION BY EVENT. ........................... 23 TABLE 12. MST RESULTS SUMMARY BY FREQUENCY OF OCCURRENCE. ..................................................................... 24 TABLE 13. MST RESULTS SUMMARY BY SAMPLING DATE AND LOCATION. ................................................................ 26 iii List of Figures (Attached file) FIGURE 1. .......................................................................................................................................... STUDY AREA MAP. FIGURE 2. .............................................................................................................. SHORELINE

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