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1 Small Tributaries Loading Study #2: Zone 4 Line A, Cabot Blvd. Hayward Lester McKee Sources Pathways and Loadings Workgroup May 22 nd 2007 Item #5b San.

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Presentation on theme: "1 Small Tributaries Loading Study #2: Zone 4 Line A, Cabot Blvd. Hayward Lester McKee Sources Pathways and Loadings Workgroup May 22 nd 2007 Item #5b San."— Presentation transcript:

1 1 Small Tributaries Loading Study #2: Zone 4 Line A, Cabot Blvd. Hayward Lester McKee Sources Pathways and Loadings Workgroup May 22 nd 2007 Item #5b San Francisco Estuary Institute

2 2 Laboratories Moss Landing Marine Labs (MLML) Moss Landing Marine Labs (MLML) AXYS Analytical Services Ltd. AXYS Analytical Services Ltd. Applied Marine Sciences, Texas Applied Marine Sciences, Texas Item #5b San Francisco Estuary Institute

3 3 Data Inventory for the Season Item #5b Samples Collected Field Duplicates Data Received Data QAQC Checked HgT40 4*34No HgD20214No MeHgT20214No MeHgD20214No PCBs20 2**13No PBDEs20 2**13No OC Pesticides (DDT, chlordane, dieldrin) 71AllNo PAHs71AllNo Trace Elements (Ag, Al, As, Cd, Cr, Cu, Mn, Ni, Pb, Se, Zn) 212AllNo SSC120 2***AllNo Organic carbon (DOC, POC)160AllNo *One was a comparison between the ISCO and the D95 **One broken during shipping *** Simultaneous samples (ISCO/D95) not yet inventoried San Francisco Estuary Institute

4 4 Summary Statistics (Mercury) Item #5b San Francisco Estuary Institute HgT (ng/L) HgD (ng/L) HgP (ng/L) HgP (% HgT) HgP (mg/kg) MeHgT (ng/L) MeHgD (ng/L) MeHgP (ng/L) MeHgP (% MeHgT) Min Max

5 5 Summary Statistics (Trace Elements) Summary Statistics (Trace Elements) (ug/L) Item #5b San Francisco Estuary Institute AgAlAsCdCrCuMnNiPbSeZn Min

6 6 Summary Statistics (Organics) Item #5b San Francisco Estuary Institute DOC (mg/L) POC (mg/L) PCB (pg/L) PBDE (pg/L) PAH (pg/L) OC Pest Min ,8262,532- Max ,663141,21827,769-

7 7 Options for WY 2008 Given WY 2007 was the ramp up year there was the cost of buying equipment. Next year those funds can be used for one or a combination of the following: Collect many more water samples (same list of analytes) Collect many more water samples (same list of analytes) Collect a few more water samples (increase number of analytes) Collect a few more water samples (increase number of analytes) Do a pilot study on the neighboring watershed Do a pilot study on the neighboring watershed Give the funds back to the TRC to reallocate Give the funds back to the TRC to reallocate San Francisco Estuary Institute

8 8 Acknowledgements SPLWG approved a 5-year work plan supported continuation of improved loading information SPLWG approved a 5-year work plan supported continuation of improved loading information TRC funded a $7.5k reconnaissance study of 18 potential sampling locations TRC funded a $7.5k reconnaissance study of 18 potential sampling locations May SPLWG deliberated and decided to study Z4LA in Hayward with Colma Creek, South San Francisco as a 2 nd option. May SPLWG deliberated and decided to study Z4LA in Hayward with Colma Creek, South San Francisco as a 2 nd option. July TRC approved funding July TRC approved funding August McKee and Eads worked with Arleen Feng from Alameda County to develop permit language and County approved encroachment permit August McKee and Eads worked with Arleen Feng from Alameda County to develop permit language and County approved encroachment permit November 2006 – Purchase and fabrication completed and equipment installed November 2006 – Purchase and fabrication completed and equipment installed Item #5 San Francisco Estuary Institute


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