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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 1079 North Main Street <br /> Manteca, CA <br /> Wic #204-4728-0502 ` <br /> MTBE Depth to GW D O <br /> Well ID Date TPPH B T E X 8020 MTBE 8260 TOC Water Elevation Reading <br /> (ug/L) u IL u IL u IL u IL u IL u IL (MSL)_ <br /> MSL ft (MSL) (ppm) <br /> MW-3 01/28/1999 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 3534 1660 1874 1 3 <br /> MW-3 04/08/1999 <50 0 <0 500 <0 500 <0 500 <0 500 <5 00 230 3534 1623 1911 1 2 <br /> MW-3 07/22/1999 <50 0 <0 500 <0 500 <0 500 <0 500 449 343 3534 1791 1743 1 3 <br /> MW-3 10/1311999 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 3534 1965 1569 45 <br /> MW-3 01/06/2000 <50 0 <0 500 1 <0 500 <0 500 <0 500 <2 50 <2 00 3534 1992 1542 29 <br /> MW-3 04/11/2000 <50 0 <0 500 <0 500 <0 500 <0 500 468 176 3534 1855 1679 26 <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> BTEX=benzene,toluene, ethylbenzene, xylenes by EPA Method 8020 <br /> MTBE= methyl-ternary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW= Groundwater <br /> ug/L= parts per billion <br /> ppm=parts per million <br /> msl = Mean sea level <br /> ft= Feet <br /> <n = Below detection limit <br /> D = Duplicate sample <br /> Notes <br /> a = Sample re-analyzed past hold time, results should be considered estimates <br /> Page 2 <br />