Draft Data - Do Not Cite, Quote, or Distribute 2006 Sport Fish Status and Trends March 18, 2008 TRC Meeting Jennifer Hunt

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Presentation transcript:

Draft Data - Do Not Cite, Quote, or Distribute 2006 Sport Fish Status and Trends March 18, 2008 TRC Meeting Jennifer Hunt

Draft Data - Do Not Cite, Quote, or Distribute 2006 Status & Trends Sport Fish 3 Main Indicator Species  Organics – white croaker & shiner surfperch PCBs – PBDEs – Dioxins – Legacy Pesticides  Mercury – striped bass Analysis pending otolith results Have white sturgeon mercury data

Draft Data - Do Not Cite, Quote, or Distribute 2006 Additional Species Look at additional sport fish species  Anchovy, barred surfperch, black surfperch, brown rockfish, Chinook salmon, rubberlip surfperch, walleye surfperch  Analyzed PCBs, Hg and PBDEs

Draft Data - Do Not Cite, Quote, or Distribute Screening Values PCBs – TMDL Tissue Target – 10 ppb ww Dioxins – TMDL Tissue Target – 0.14 ppt ww Mercury – TMDL Tissue Target 0.2 ppm ww DDT, Chlordane, and Dieldrin – OEHHA values PBDEs – No state screening value

Draft Data - Do Not Cite, Quote, or Distribute Many Species Still Exceeding Targets AnalyteMercury* Total Aroclors*DioxinsTotal DDT Total ChlordanesDieldrin Screening Value 0.20 ppm ww10 ppb ww0.14 ppt ww 100 ppb ww30 ppb ww 2 ppb ww Shiner SurfperchNM15/15NA0/15 4/15 White CroakerNM9/9 3/91/94/9 White Sturgeon3/44/4NA0/4 1/4 All S&T Species3/428/289/93/281/289/28 All Species (Including Special Study Species)8/2542/499/93/281/289/28 % of Species Above SV

Draft Data - Do Not Cite, Quote, or Distribute 100% Croaker Exceeding PCB TMDL Target 97% reduction in average concentrations to reach target

Draft Data - Do Not Cite, Quote, or Distribute 100% Shiner Exceeding PCB TMDL Target 96% reduction in average concentrations to reach target

Draft Data - Do Not Cite, Quote, or Distribute PCBs - Other Species

Draft Data - Do Not Cite, Quote, or Distribute Shiner Perch PCBs highest in Oakland ( )

Draft Data - Do Not Cite, Quote, or Distribute 75% of Sturgeon Above Hg TMDL Target

Draft Data - Do Not Cite, Quote, or Distribute Good News! Many Bay Species Below Hg TMDL Target

Draft Data - Do Not Cite, Quote, or Distribute Sturgeon Mercury Higher in South Bay 57% of the variation in Hg accounted for by Site

Draft Data - Do Not Cite, Quote, or Distribute Dioxins Not Changing Sum of Dioxin and Furan TEQs

Draft Data - Do Not Cite, Quote, or Distribute Dioxins Varying by Site & Time Sum of Dioxin and Furan TEQs

Draft Data - Do Not Cite, Quote, or Distribute Bay Wide Dioxins Sum of Dioxin and Furan TEQs

Draft Data - Do Not Cite, Quote, or Distribute Is Dioxin Equivalency Higher in 2006? Sum of Dioxin, Furan, and dioxin-like PCB TEQs

Draft Data - Do Not Cite, Quote, or Distribute Dioxin Equivalent Toxicity higher in 2006? Sum of Dioxin, Furan, and dioxin-like PCB TEQs White Croaker PCB TEQ (ND=1/2 MDL)

Draft Data - Do Not Cite, Quote, or Distribute Higher Dioxin Equivalent Toxicity due to higher Dioxin-Like PCBs Sum of dioxin like PCB TEQs

Draft Data - Do Not Cite, Quote, or Distribute 2006 PBDEs - All Species

Draft Data - Do Not Cite, Quote, or Distribute PBDEs Varying Over Time Oakland

Draft Data - Do Not Cite, Quote, or Distribute 2006 Dieldrin  White Croaker South Bay had the highest concentrations – 3.3 ppb 44% of Croaker Above SV (Oakland and South Bay)  Shiner Surfperch South Bay had the highest concentrations – 2.5 ppb 27% of Shiner Above SV (Oakland and South Bay)  White Sturgeon 25% of Sturgeon Above SV (South Bay)

Draft Data - Do Not Cite, Quote, or Distribute 2006 DDTs  White Croaker South Bay had the highest concentrations – 110 ppb 33% of Croaker Above SV (South Bay and SPB)  Shiner Surfperch Oakland had the highest concentrations – 27 ppb 0% of Shiner Above SV  White Sturgeon  South Bay had the highest concentrations – 42 ppb  0% of Sturgeon Above SV

Draft Data - Do Not Cite, Quote, or Distribute 2006 Chlordanes  White Croaker South Bay had the highest concentrations – 24 ppb 11% of Croaker Above SV  Shiner Surfperch South Bay had the highest concentrations – 12 ppb 0% of Shiner Above SV  White Sturgeon  South Bay had the highest concentrations – 13 ppb  0% of Sturgeon Above SV

Draft Data - Do Not Cite, Quote, or Distribute DDTs Varying Over Time Oakland

Draft Data - Do Not Cite, Quote, or Distribute 2006 Summary White croaker organic concentrations generally elevated over past years Oakland generally higher than other sites for many contaminants 100% white croaker, shiner perch, white sturgeon above PCB target Interannual variation in PCBs but no time trends Shiner PCBs statistically higher in Oakland South Bay Hg statistically higher for shiner, jacksmelt, and white sturgeon 100% white croaker above 0.14 dioxin target No time trends in croaker dioxins Croaker, shiner and sturgeon still exceeding dieldrin SV