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0 0 0 Cumulative Table Of Well Data and Analytical Results Vertical Measurements are in feet. Analytical results are in parts per billion (pb) . Well Ground Depth DATE head Water To Notes TPH- Benzene Toluene Ethyl- Xylene Fecal MTBE Elev. Elev. Water Gasoline Benzene Coliform" MW-4 03!013/91 12.30 -32.45 44.75 ND ND ND ND ND 06/27/91 12,30 -32.78 45.08 ND ND ND ND ND 09/12/91 12.30 -33.17 45.47 ND ND ND ND ND 12/06/91 12.30 -33.27 45.57 ND ND ND ND ND _ - 04/03/92 12.30 -31.98 44.28 ND ND ND ND ND 07/10/92 12.30 -33.24 45.54 ND ND ND ND ND 11/10/92 12.30 -34.86 47.16 ND ND ND 2.0 6.9 02/16/93 12.30 -32.88 45.18 ND ND ND ND ND 05/17/93 12.30 -30.64 42.94 430 8.0 24 13 81 08/17/93 12.30 -30.72 43.02 ND ND ND ND ND 11/22/93 12.30 -31.13 43.43 ND ND ND ND ND 02/09/94 12.30 -30.92 43.22 ND ND ND ND ND 05/27/94 12.30 -29.89 42.19 ND ND ND ND ND - 08/05/94 12.30 -30.16 42.46 ND ND ND ND ND 11/22/94 12.30 -31.07 43.37 <50 <0.5 <0.5 <0,5 <0.5 02/24/95 12.30 -27.15 39.45 <50 <0.5 <0.5 <0.5 <0.5 05/16/95 12.30 -23.47 35-77 <50 <0.5 <0,5 <0.5 <0.5 08/03/95 12.30 -21.85 34.15 <50 <0.5 <0.5 <0.5 <0.5 11/16/95 12.30 -22.90 35.20 <50 <0.5 <0.5 <0.5 <0.5 02/22/96 12.30 -20.76 33.06 <50 <0.5 <0.5 <0.5 <0.5 05/07/96 12.34 -18.51 30.85 <50 <0.5 <0.5 <0.5 <0.5 <2 5 08/21/96 12.34 -18.86 31.20 <50 <0.5 <0.5 <0.5 <0.5 <2.5 09/24/96 12.34 -18.91 31.25 11/06/96 12.34 -18.96 31.30 - <50 <0.5 <0.5 <0.5 <0.5 <2 5 02/27/97 12.34 14.22 26.56 <50 <0.5 <0.5 <0,5 <0.5 <2.5 05/20/97 12.34 -14.63 26.97 <50 <0.5 <0.5 <0.5 <0.5 <2.5 09/02/97 12.34 -15.29 27.63 <50 <0.5 <0.5 <0.5 <0.5 <2-5 11/24/97 12.34 -15.75 28.09 <50 <0.5 <0.5 0.96 0.53 <2 5 CONTINUED ON NEXT PAGE Focal coliforms measured in organisms per 100 ml. " Oxygenates by EPA 6260 and Methanol by EPA 8015 were not detected; see lab report for detection limits. f 13kifr e: led, Services Inc. 991 , 991202-C-1 4th - 0 1999 Monitoring at Chevron 9-0557 139 S. Center St., Stockton, CA 7