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I I <br /> WELL CONCENTRATIONS <br /> Former Texaco Service Station <br /> 440 West Charter Way <br /> Stockton,CA <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 118260 DIPS ETBE TAME TBA 1,2-DCA EDB Ethanol Methanol TOC Water Elevatlon Thickness Reading <br /> u !L u IL u 1L u IL u 1L u !L (ug/L (ug/L (ug/L (u/L (ug/L (ug/L (ug/L (ug&)_ IL u !L MSL ft MSL R m <br /> I <br /> i <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608 pnor to May 17 2001 analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 I 1 11 <br /> BTEX=Benzene toluene ethylbenzene xylenes by EPA Method 82608 prior to May 17 2001 analyzed by EPA Method 8020 <br /> MTBE=Methyl tertiary butyl ether i <br /> DIPE=DHsopropyl ether,analyzed by EPA Method 8260B <br /> ETBE=Ethyl tertiary butyl ether,analyzed by EPA Method 82608 <br /> TAME=Tertiary amyl methyl ether,analyzed by EPA Method 8260B <br /> TBA=Tertiary butyl alcohol analyzed by EPA Method 82606 <br /> I 2-DCA=1 2-Dichlomethane,analyzed by EPA Method 82608 <br /> EDB=1 2-Dibromoethane analyzed by EPA Method 82608 <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> 00=Dissolved Oxygen <br /> ppm=Parte per million <br /> ugtt=Parts per billion <br /> MSL=Mean sea level <br /> ft.=Feet <br /> -cn=Below detection limit <br /> NA=Not applicable <br /> ND=Not detected at or above the minimum quantitation limit <br /> Notes <br /> a-Result reported was generated out of hold time <br /> b=Well not sampled due to lack of access agreement <br /> c=Hydrocarbon does not match pattern of laboratory's standard <br /> d=Hydrocarbon reported is in the early Diesel range and does not match the laboratory's standard <br /> Ethanol and Methanol analyzed by EPA Method 82608 <br /> Site surveyed(except MW-8)on February 20 2002 by Virgil Chavez Land Surveying of Vallejo CA <br /> Wells MW-8 MW-11-82 MVV-11-122,MVV-18-80 MW-16-120 MW-19-81 and MW 19-120 surveyed September 20 2002 by Virgil Chavez Land Surveying of Vallejo CA <br /> li <br /> 3 <br /> Page 26 <br />