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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2494 Fremont Street <br /> Stockton, CA <br /> MTBE Depth to GW SPH <br /> Well ID Date TPPH B T E X $260 DIPE ETBE TAME TBA 1,2-DCA EDB Methanol Ethanol TOC Water Elevation Thickness <br /> (u/L (u/L (u/L (ug/L a 1L (ug/L (u/L) (ug/L (ug/L (ug/L (u/L (ug/L (ug/L u lL) (M5L) ft M5L ft <br /> Notes <br /> a=Pre-Development water level <br /> b=Post-Development water level <br /> c=This sample analyzed outside of EPA recommended holding time <br /> d=TPPH and BTEX analyzed by EPA Method 82606 <br /> e=Hydrocarbon does not match pattern of laboratory's standard <br /> f=On the December 30,2003 Chain of Custody well S-3-84 incorrectly listed as S-3-85 and well S-4-83 incorrectly listed as S-4-85 <br /> g=The concentration reported reflects individual or discrete umdenbtied peaks not matching a typical fuel pattern <br /> h=Extracted out of holding time <br /> Ethanol and Methanol analyzed by EPA Method 82608 <br /> Site surveyed January 8,2000 by Virgil Chavez Land Surveying of Vallejo,CA <br /> Site surveyed January 14 2002 by Virgil Chavez Land Surveying of Vallejo CA <br /> Wells S-1-85,S-3-84,and S-4-83 surveyed December 23,2002 <br /> Wells S-2-85,S-5,and S-6 surveyed December 23 2002 <br /> Page 8 <br />