1. 6-13-06Fish Mercury Project Office of Environmental Health Hazard Assessment California Environmental Protection Agency DEVELOPING SAFE EATING GUIDELINES FOR CENTRAL VALLEY SPORT FISH Robert Brodberg, Margy Gassel, Susan Klasing, and Sue Roberts

2. 6-13-06Fish Mercury Project OEHHA’s Activities  Task 1 & 3: Monitoring design to characterize water bodies to support developing advisories. Formulate monitoring plans for sport fish.  Task 7: Assess risks in water bodies using existing data or project data and develop fish consumption advisories.  Task 8: Communicate risks and safe eating guidelines using advisories and associated materials.

3. 6-13-06Fish Mercury Project Monitoring Overview Year 1  Cosumnes, Mokelumne & Feather Rivers  San Joaquin River and Delta from Mokelumne River south  Salmon, steelhead, hatchery trout Year 2  Sacramento River & tributaries & north Delta  Lake Shasta and other northern reservoirs  Striped bass, shad, sturgeon Year 3  San Joaquin R. tributaries and reservoirs

4. 6-13-06Fish Mercury Project 2005 ACTIVITIES  Detailed sampling plan  Interactive coordination monitoring - Spreadsheet target sites, species & number samples - DFG reported collections on a regular basis – OEHHA feedback - OEHHA created analysis instructions - Coordinated resampling  Coordination of organics analyses - SRWP - Region 5, SWAMP

5. Collection Spreadsheet

6. Analysis Spreadsheet

7. Resampling Instructions

8. 6-13-06Fish Mercury Project 2005 ACTIVITIES (cont.)  OEHHA workplan for advisory development  Coordination of Delta communication materials with DHS  Coordination of advisory outreach & materials - Lake Berryessa & Putah Creek - Advisory pocket cards for Lake Berryessa & Putah Creek - Lower Cosumnes & Mokelumne Rivers  Draft Advisory Lower Cosumnes & Mokelumne Rivers

9. 6-13-06Fish Mercury Project Putah Creek Pocket Card

10. Cosumnes and Mokelumne River Sampling Sites

11. MEAN MERCURY CONCENTRATIONS in Fish from the Lower Cosumnes River SPECIESMERCURY(ppm)LENGTH(mm) SAMPLE SIZE Asiatic Clam 0.042777 Bluegill0.341195 Largemouth Bass 1.1838118 Red Swamp Crayfish 0.424421 Redear Sunfish 0.3015313 Sacramento Sucker 0.454137 Signal Crayfish 0.29417 White Catfish 0.542945

12. MEAN MERCURY CONCENTRATIONS in Fish from the Lower Mokelumne River SPECIESMERCURY(ppm)LENGTH(mm) SAMPLE SIZE Asiatic Clam 0.0322105 Bluegill0.2517625 Largemouth Bass 0.8136837 Sacramento Pikeminnow 0.572933 Sacramento Sucker 0.303277 Signal Crayfish 0.184883 White Catfish 0.2525710

13. 6-13-06Fish Mercury Project Risk Assessment  Exposure for a “virtual consumer”  Use Hg RfD as a “safe exposure” level Women childbearing age/children Women beyond childbearing age/men  Determine multiple “safe eating” levels for different consumption frequencies  Determine concentrations in fish equal to “safe eating” levels (GTLs) - Draft GTLs for other chemicals  Issue advisory based on measured tissue concentrations in fish

14. Darell Slotton, UCD

15. 6-13-06Fish Mercury Project Introduction to Safe Eating Guidelines  Safe eating guidelines more positive  Focus first on benefits  AHA recommendations

16. AVOID DO NOT EAT MORE THAN THE AMOUNT LISTED BELOW: DO NOT EAT Largemouth, smallmouth or spotted bass; or Sacramento pikeminnow 1 MEAL A MONTH All other fish or crayfish species* Women of childbearing age, pregnant or breastfeeding women, and children 17 years and under: SAFE EATING GUIDELINES FOR FISH CONSUMPTION FROM THE LOWER COSUMNES RIVER *Asiatic clams may be eaten up to 3 meals a week

17. SAFE EATING GUIDELINES FOR FISH CONSUMPTION FROM THE LOWER COSUMNES RIVER Women beyond childbearing age and men: ENJOY UP TO 2 MEALS A WEEK Bluegill or redear sunfish or Asiatic clams* EAT IN MODERATION NO MORE THAN ONE MEAL A WEEK Crayfish or Sacramento sucker or white catfish AVOID NO MORE THAN ONE MEAL A MONTH Largemouth, smallmouth or spotted bass; or Sacramento pikeminnow *Asiatic clams may be eaten up to 3 times a week

18. EAT IN MODERATION NO MORE THAN 1 MEAL A WEEK Crayfish* AVOID NO MORE THAN 1 MEAL A MONTH All fish species Women of childbearing age, pregnant or breastfeeding women, and children 17 years and under: SAFE EATING GUIDELINES FOR FISH CONSUMPTION FROM THE LOWER MOKELUMNE RIVER *Asiatic clams may be eaten up to 3 times a week

19. SAFE EATING GUIDELINES FOR FISH CONSUMPTION FROM THE LOWER MOKELUMNE RIVER Women beyond childbearing age and men: ENJOY UP TO 2 MEALS A WEEK Crayfish or bluegill or Sacramento sucker or white catfish or Asiatic clams* AVOID NO MORE THAN ONE MEAL A MONTH Largemouth, smallmouth or spotted bass; or Sacramento pikeminnow *Asiatic clams may be eaten up to 3 times a week

20. 6-13-06Fish Mercury Project Follow the Striped Bass Advisory for Delta Water Bodies Women of childbearing age and children 17 years and younger: No more than one meal per month and none over 27 inches Women beyond childbearing age and men: No more than two meals per month and none over 35 inches DELTA STRIPED BASS ADVISORY

21. 6-13-06Fish Mercury Project General Information Related to Recommendations  Larger fish more contaminated

22. 6-13-06Fish Mercury Project Commercial Fish Information  Commercial information  AHA-Federal recommendation

23. 6-13-06Fish Mercury Project Untested Water Bodies

24. 6-13-06Fish Mercury Project Questions on 2005 Activities?

25. 6-13-06Fish Mercury Project Plans for 2006  Develop 2006 sampling matrix and draft plan for review - Sacramento River & tributaries & north Delta - Lake Shasta and other northern reservoirs - Striped bass, shad, sturgeon  Develop final detailed plan and collection spreadsheet  Interactive coordination with DFG during sampling  Develop analysis plan, resampling plan, coordinate external organics analyses

26. 6-13-06Fish Mercury Project Plans for 2006 (cont.)  Advisories for 2006 - Feather River - San Joaquin River and Delta from Mokelumne River south  Continued coordination with DHS to develop outreach plans & materials  Begin other advisories for 2007 - Sacramento River and north Delta - Regional salmon* & steelhead* - Hatchery trout* * Require organics results to complete

27. 6-13-06Fish Mercury Project Plans for 2006 (cont.)  Consider developing format for collection of fishing site, activity and species data for 2007 sampling planning  San Joaquin River tributaries - Calaveras - Stanislaus - Tuolumne - Merced  Southern tributary reservoirs - New Hogan - New Melones & Lake Tulloch - Don Pedro - Lake McSwain & Lake McClure

28. 6-13-06Fish Mercury Project Plans for 2006 (cont.)  Planning for 2007 sampling (cont.)  Other southern reservoirs - Lake Amador - Woodward Res. - Yosemite Lake - Eastman Lake - Hensley Lake - Modesto Res. - San Luis Res. - O’Neill Forebay  Other water bodies - California Aqueduct

29. 6-13-06Fish Mercury Project

30. 6-13-06Fish Mercury Project Comments/Discussion