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0 Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feet. Analytical results are in parts per billion(ppb) Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene Fecal MTBE Elev, Elev. Water Gasoline Benzene Coliform MW-7 12128/95 11.08 -23.03 34.11 05/16/96 11.08 -22.12 33.20 -- 9700 350 97 750 880 <125 08/21/96 11.08 -- -- -- - 09/24/96 11.08 -19.59 30.67 -- 9800 450 66 790 500 110 11/06/96 11.08 -19.93 31.01 -- 8200 290 28 470 380 54 02/27/97 11.08 -14.74 25.82 -- 8700 340 51 510 390 <100 05/20/97 11.08 -15.30 26.38 -- 8200 290 60 460 410 110 09/02/97 11.08 -16.12 27.20 -- 6400 230 35 400 260 23 11/24/97 11.08 -16.59 27.67 6300 260 <50 420 210 <250 02/11/98 11.08 -13.82 24.90 -- 3800 120 18 110 140 <25 06/09/98 11.08 -10.54 21.62 "** 7800 400 84 450 <50 780 07/30/98 11.08 -10.42 21.50 -- 4300 230 25 350 120 <100 11/10/98 11.08 -11.46 22.54 -- 3600 110 6 7 210 67 <50 MW-8 11/24/97 11.28 -16.85 28.13 *i <50 <0 5 <0.5 <0.5 <0 5 <2 5 02/11/98 11.28 -14.53 25.81 1200 57 9.0 4.7 6 8 <2.5 06/09/98 11,28 -10.72 22.00 '** 480 16 2.3 3.0 <50 4-0 07/30/98 11.28 -10.62 21.90 - 160 37 0.79 1 9 053 <2 5 11/10/98 11.28 -11.63 22.91 <50 <0 5 <0.5 <0.5 <0 5 <2.5 MW-9 11/24/97 11.68 -16.27 27.95 "' 120,000 14,000 30,000 3100 15,000 1800 02/11/98 11.68 -13.41 25.09 -- 110,000 6900 20,000 2600 13,000 <500 06/09/98 11.68 -10.33 22.01 *** 75,000 7800 19,000 2300 12,000 <250 07/30/98 11.68 -10.14 21.82 - 66,000 5500 1700 1800 1300 1300 11/10/98 11.68 -11.16 22.84 - 4700 140 8.1 280 87 <50 *}Oxygenates by EPA 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-t 4th-Q 1988 Monitoring at Chevron 9-0557 139 S.Center St., Stockton, CA 7