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TWO <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#9-6171 - <br /> 6633 Pacific Avenue <br /> Vertical Measurements are in feet Stockton,California Analytical results are in parts per billion(ppb) <br /> Well T Ground Depth <br /> DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylenes MTBE EDB DIESEL Oil TOG <br /> Elev Elev Water Gasoline Benzene <br /> MW-3(cont) <br /> 11/11/97 1267 -2587 3854 Confirmation run -- -- - <6 4 - <br /> 11/14/97 1267 -- -- -- - - - -- - - <br /> 03/01/98 1267 -2306 3573 150* <05 <0 5 <0 5 <0 5 <2 5 <br /> 23 06 35 73 Confirmation run - -- <2 0 - - <br /> 03/01/98 12 67 -- -- -- <br /> 05/10/98 1267 -2129 3396 -- 360* <0 5 <0 5 <0 5 <0 5 <2 5 <br /> 8117-18198 1267 -2109 3376 -- 120* <0 5 <0 5 <0 5 <0 5 <2 5 11/18/98 1267 -2048 33 15 120* <0 5 <0 5 <0 5 <0 5 <2 5 -- - <br /> 02/23/99 1267 -2262 3529 -- 247* <0 5 <0 5 <0 5 <0 5 <5 0 <br /> 05/19/99 1267 -1880 3147 -- 419* 242 <0 5 <0 5 <0 5 <5 0 <br /> 08/26/99 1267 -1986 3253 -- 361 145 <0 5 <0 5 <0 5 <5 0 - - -- <br /> 11/17/99 1267 -1993 3260 -- 305 147 <0 5 161 1 74 <50 <br /> 02/16/00 1267 -22 15 3482 -- 1410 <2 5 <2 5 272 <2 5 <12 5 <br /> 05/22/00 1267 -1987 32 54 -- 3401 054 <0 50 <0 50 058 <2 5 -- -- -- -- <br /> *Chromatogram pattern indicates an unidentified hydrocarbon <br /> MW-4 <br /> 09/05/90 1301 -4224 55 25 -- <50 <0 5 <0 5 <0 5 <0 5 -- <0 2 <br /> 11/29/90 1301 -4250 5551 -- <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 03/14/91 13 01 -4276 5577 -- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 06/06/91 13 01 -4262 55 63 -- 630** 0 5 10 <0 5 1 2 -- <br /> 08/29/91 13 01 -43 26 5627 - 610* <0 5 <0 5 <0 5 <0 5 - <br /> 12/06/91 1301 -42 12 55 13 680*** 3 0 5 6 1 7 6 5 -- <br /> 03/12/92 13 01 -4084 5385 1400* <0 5 <0 5 <0 5 <0 5 -- -- -- <br /> 06/11/92 1301 -4225 5526 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 09/03/92 1301 -4342 5643 -- 480* 0 7 <0 5 <0 5 1 7 -- <br /> 12/17192 1301 -4233 5534 -- 4800 0 6 15 2 7 17 - <br /> *Chromatogram pattern indicates an unidentified hydrocarbon <br /> **Gasoline range concentration reported,peaks are representative of tetrachloroethane and trace amount of gasoline <br /> ***Chromatogram pattern indicates an unidentified hydrocarbon and gas <br /> 9-6171 xls/#385121 4 As of 05/22/00 <br />