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Cumulative Table of Well Data and Analytical Results Vertical Measurements a Associated Analytical fesulls are in parts per billion(ppb) Well Ground Depth DATE head Water To Notes TPH- Benzene Toluene Ethyl- Xylene Fecal MTB= Eiev. Elev. Water Gasoline Benzene Coliform ` MW-1 03/08/91 11.17 -32.72 43.89 - 1400 250 13 62 47 06/27/91 11.17 -33.00 44.17 -- 1300 31 3.1 18 8 4 ND 09/12/91 11.17 -33.40 44.57 -- 1700 40 6.8 8.6 11 12/06191 11.17 -33.63 44.80 - 1700 46 ND ND 12 04/03/92 11.17 -32.28 43.45 1900 67 8.3 9 6 14 140 07/10/92 11.17 -33.51 44.68 17,000 430 1800 410 1600 <2 2 11/10/92 11.17 -35.22 46.39 - 1900 160 7.4 11 18 02/16/93 11.17 -33.33 44.50 -- 6400 570 91 24 110 >23 05/17/93 11.17 -30.93 42.10 - 4800 230 19 19 33 >23 08/17/93 11.17 -31.03 42.20 - 1500 39 30 1 0 4 0 11/22/93 11.17 -31.46 42.63 -- 1700 27 6.0 4 0 10 02/09/94 11.17 -31,17 42.34 -- 1900 51 5.0 3 0 11 05/27/94 11.17 -30.16 41.33 -- 1400 38 55 0 6 3 5 08/05/94 11.17 -30.49 41.66 -- 1400 47 58 1 4 6 8 11/22/94 11.17 -31.45 42.62 <50 <0 5 <0.5 <0 5 <05 02/24/95 11.17 -27.38 38.55 -- 1800 38 5.8 15 51 05/16/95 11.17 -23.67 34.84 - 280 12 12 <10 1 7 08/03/95 11.17 -23.03 34.20 - 160 0.96 <0.5 <0 5 074 11/16195 11.17 -23.13 34.30 -- 85 0.85 <0.5 <0.5 <0 5 02/22/96 11.17 -21.00 32.17 -- <50 <0 5 <0.5 <0.5 <0 5 05/07/96 11.23 -18.61 29.84 -- <50 <0 5 <0.5 <0 5 <0 5 <2.5 08/21/96 11.23 -18.97 30.20 - <50 3 8 <0 5 <0.5 0 57 4 7 09/24/96 11.23 -19.13 30.36 - - -- 11/06/96 11.23 -19.23 30.46 <50 <0 5 <0.5 <0 5 <0 5 <2 5 02/27/97 11.23 -14.44 25.67 - <50 <05 <0 5 <0.5 <05 <2 5 05/20/97 11.23 -14.96 26.19 <50 <0 5 <0 5 <0 5 <0 5 <2.5 09/02/97 11.23 -15.78 27.01 -- <50 <0.5 <0.5 <0 5 <05 <2 5 11/24/97 11.23 -16.20 27.43 "* <50 069 1 6 093 1 5 <2.5 02/11/98 11.23 -13.29 24.52 -- <50 <0 5 <0.5 <0 5 <05 <2.5 06/09/98 11.23 -18.13 29.36 ""* <50 <0.5 <05 <0.5 <0 5 <2 5 07/30/98 11.23 -10.12 21.35 - <50 <0 5 <0.5 <0.5 <0 5 <2 5 11/10/98 11.23 -11.04 22.27 -- <50 <0 5 <0.5 <0 5 <0 5 <2 5 " Fecal coliforms measured in organisms per 100 ml. "Oxygenates by I=PA 8260 and Methanol by EPA 8015 were not detected; see lab report for detection limits. *'*Oxygenates by EPA 8260 were not detected; see lab report for detection limits Blaine Tech Services, Inc. 981110-T-1 41h-Q 1998 Monitoring at Chevron 9-0557 139 S Center St, Stockton, CA 1