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. ing TabjW Groundwater Monitoring Wand Analytical Results Chevron Service Station#9-0557 139 South Center Street Stockton,California Anal}tical results are in parts per billion(ppb) Vertical Measurements are in feet. Well Ground Depth DATE Head Water To Nates TPH- Benzene Toluene Ethyl- Xylenes MTBE Fecal Elev. Elev. Water Gasoline Benzene Coliform' i MW-1 03/08/91 11.17 -32.72 43.89 -- 1400 250 13 62 47 -- 06l27191 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 - -- 12/06/91 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 3.0 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 5.5 0.6 3.5 -- - 08/05/94 11.17 -30.49 41.66 -- 1400 47 5.8 1.4 6.8 -11/22/94 11.17 -31.45 42.62 -- <50 <0.5 <0.5 <0,5 <0.5 -- - 02/24/95 11.17 -27.38 38.55 -- 1800 38 5.8 1.5 5.1 - 05/16/95 11.17 -23.67 34.84 -- 280 12 1.2 <1.0 1.7 08/03/95 11.17 -23.03 34.20 -- 160 0.96 <0.5 <0.5 0.74 - -- 11/16/95 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 - 05107/96 11.23 -18.61 29.84 -- <50 <03 <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 4.70 09124/96 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 <0.5 <0.5 <0.5 <0.5 <2.5 - 05l20197 11.23 -14.96 26.19 <50 <0.5 <0.5 <0.5 <0.5 02.5 09102097 11.23 -15.78 27.01 -- <50 <0.5 <0.5 <0.5 0.5 <2.5 - 1 9-0557.xls/#386843 1 As of 08114100