San Francisco Estuary Institute Small Tributaries Loading Study #2 Zone 4 Line A, Cabot Blvd. Hayward Year 2 – Draft Data To-date Sources Pathways and.

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Presentation transcript:

San Francisco Estuary Institute Small Tributaries Loading Study #2 Zone 4 Line A, Cabot Blvd. Hayward Year 2 – Draft Data To-date Sources Pathways and Loadings Workgroup May 14 th 2008 Alicia Gilbreath and Lester McKee Item #2b-2

Channel construction San Francisco Estuary Institute WY 2007 WY 2008 Item #2b-2

Hg sampling status Item #2b-2 HgT: 27 samples collected to date, 5 remaining 27 samples collected to date, 5 remaining 22 samples lab-analyzed to date 22 samples lab-analyzed to date HgD, MeHgT, MeHgD: 12 samples collected to date, 4 remaining 12 samples collected to date, 4 remaining 11 HgD samples lab-analyzed to date 11 HgD samples lab-analyzed to date San Francisco Estuary Institute

Hg data in so far HgT range (n=22): ng/L HgT range (n=22): ng/L San Francisco Estuary Institute Item #2b-2

HgT comparison between WYs San Francisco Estuary Institute Item #2b-2

PCB sampling status and data San Francisco Estuary Institute Item #2b-2 27 samples collected to date, 5 remaining 27 samples collected to date, 5 remaining t-PCB range (n=11): 3091 – 104,513 pg/L t-PCB range (n=11): 3091 – 104,513 pg/L

PCB comparison between WYs San Francisco Estuary Institute Item #2b-2