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) Min1.90.88.7730.0380.0810.0210.05352 Max555.152950.440.560.110.4896

5. 5 Summary Statistics (Trace Elements) Summary Statistics (Trace Elements) (ug/L) Item #5b San Francisco Estuary Institute AgAlAsCdCrCuMnNiPbSeZn Min0.0282.50.660.040.983.2411.13.260.56<MDL7.45 Max0.084,4912.380.4239.227.61924922.21.17181

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 Min3.20.064332,8262,532- Max11.64.6638,663141,21827,769-

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 2005 - SPLWG approved a 5-year work plan supported continuation of improved loading information 2005 - SPLWG approved a 5-year work plan supported continuation of improved loading information 2005 - TRC funded a $7.5k reconnaissance study of 18 potential sampling locations 2005 - TRC funded a $7.5k reconnaissance study of 18 potential sampling locations May 2006 - SPLWG deliberated and decided to study Z4LA in Hayward with Colma Creek, South San Francisco as a 2 nd option. May 2006 - SPLWG deliberated and decided to study Z4LA in Hayward with Colma Creek, South San Francisco as a 2 nd option. July 2006 - TRC approved funding July 2006 - TRC approved funding August 2006 - McKee and Eads worked with Arleen Feng from Alameda County to develop permit language and County approved encroachment permit August 2006 - 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