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WELL CONC*RATIONS <br /> Shell-branded Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> Wic #204-4728-0502 <br /> MTBE MTBE Depth to GW D O <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Reading <br /> u IL u IL u IL u IL u IL u 1L u IL MSL ft MSL (ppm) <br /> MW-3 04/28/1998 <50 <0 50 <0 50 <0 50 <0 50 63 69 3534 1512 2022 10 <br /> MW-3 07/28/1998 <50 <0 50 <0 50 <0 50 <0 50 44 45 3534 1559 1975 27 <br /> MW-3 10/07/1998 <50 <0 50 <0 50 <0 50 <0 50 11 97 3534 1640 1894 14 <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 10/13/1999 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 3534 1965 1569 45 <br /> MW-3 1 01/06/2000 1 <50 0 1 <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 /> MW-3 07/25/2000 <50 0 <0 500 <0 500 <0 500 <0 50Q <2 50 <1 00 3534 2007 15 27 40 <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-tertiary-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 /> k ' <br /> Page 2 <br />