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Tab <br /> Groundwater Monitoring nand Analytical Results ` <br /> Chevron Service Station#9-4275 <br /> 2905 West Benjamin Holt Drive <br /> Vertical Measurements are in feet Stockton,California Analytical results are in parts per billion(ppb) <br /> Well Ground Depth <br /> DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylenes MTBE <br /> Elev Elev Water Gasoline Benzene <br /> MW-4(cont) <br /> 05/06/97 281 -770 1051 -- <50* <0 5 <0 5 <0 5 <0 5 3600 <br /> 09/29/97 281 -1041 13 22 -- <1000 <10 <10 <10 <10 2100 <br /> 11/25/97 281 -1039 1320 * <50 <0 5 <0 5 <0 5 <0 5 48 <br /> 03/26/98 281 -397 678 - 65 1 9 <0 5 <0 5 <0 5 1300 <br /> 06/24/98 281 -582 863 - <50 <0 5 <0 5 <0 5 <0 5 4700 <br /> 09/10/98 281 -779 1060 -- <500 13 <5 0 <5 0 <5 0 6600 <br /> 12/17/98 281 -775 1056 - <50 <0 5 <0 5 <0 5 <0 5 2900 <br /> 03/10/99 281 -607 888 -- 57 <0 5 <0 5 <0 5 <0 5 340 <br /> 06/22/99 281 -739 1020 -- <5000 <50 <50 <50 <50 8740 <br /> 09/13/99 281 -908 1189 -- <50 <0 5 <0 5 <0 5 <0 5 1600 <br /> 12/16/99 281 -900 1181 -- <50 <0 5 <0 5 <0 5 <0 5 272 <br /> 03/01/00 2 81 -5 39 820 -- 68 7 0 542 <0 5 <0 5 <0 5 108 <br /> 06/13/00 281 -649 930 -- <50 0 <0 500 <0 500 <0 500 <0 500 896 <br /> i <br /> *The TPH-Gasoline result was 1400 ppb which was attributed to the presence of MTBE <br /> MW-5 <br /> 03/22/89 3 79 -1339 1718 4000 35 23 110 760 <br /> 06/12/89 379 -1401 1780 -- 900 24 2 0 2 0 53 -- <br /> 09l07189 379 -1532 19 11 -- 410 16 40 12 50 <br /> 09/07/89 379 -- -- Duplicate 380 15 40 11 49 <br /> 12/18/89 379 -1484 1863 - 2900 24 22 100 590 <br /> 03/20/90 379 -1440 18 19 3400 37 29 120 630 <br /> 07/03/90 3 79 -15 64 1943 -- 5500 65 89 200 1200 <br /> 10/19/90 379 -1625 2004 -- 5900 55 82 190 1100 -- <br /> 01/17/91 379 -1619 1998 -- 4900 26 51 140 830 -- <br /> 9-4275 xis/#386845 8 As of 06/13/00 <br />