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r <br /> Table 1 <br /> Cumulative Results of Groundwater Sampling and Analyses <br /> Quik Stop Market No. 132 <br /> 2555 West Hammer Lane <br /> Stockton, California <br /> Ethyl- Total Well Depth to Groundwater <br /> Date TPH-G Benzene Toluene benzene Xylenes MTBE CO2 Elevation Groundwater Elevation <br /> Sampled (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppm) (ft above MSL) (feet) (ft above MSL) <br /> Well MW-5(Cont) <br /> 10/15/91 4,200 <0 50 3 3 24 1 3 1 3 38 15 66 -1228 <br /> 12/18/91 1,200 <0 50 l 3 1 7 06 1566 -1228 <br /> 03/18/92 670 <0 50 <0 50 <0 50 <0 50 14 72 -1134 <br /> 05/05/92 610 <0 50 <0 50 <0 50 <0 50 1476 -1138 <br /> 06/16/92 650 29 <0 50 <0 50 <0 50 1511 -1173 <br /> 09/22/92 310 <0 50 <0 50 063 <0 50 15 59 -1221 <br /> r 10/26/92 330 <0 50 1 094 072 NA NA <br /> 12121192 350 <050 07 06 07 1779 -1441 <br /> j 03/17/93 280 <0 50 <0 50 06 07 12 85 -947 <br /> 06/18/93 500 1 <0 50 <0 50 <0 50 1236 -898 <br /> 12/17/93 <50 <0 50 <0 50 <0 50 <0 50 13 2 -982 <br /> 03/25/94 <50 <0 50 <0 50 <0 50 <0 50 1282 -944 <br /> 06121/94 <50 <0 50 <0 50 <0 50 <0 50 1269 -931 <br /> 08/02/94 53 <0 50 <0 50 <0 50 <0 50 1285 -947 <br /> 09/13/94 <50 <0 50 <0 50 <0 50 <0 50 13 14 -976 <br /> 12/09/94 56 <0 50 <0 50 <0 50 <0 50 1374 -1036 <br /> 02/22/95 <50 <0 50 <0 50 <0 50 <0 50 12 18 -88 <br /> 03/16/95 <50 <0 50 <0 50 <0 50 <0 50 1137 -799 <br /> 05/26/95 <50 <0 50 <0 50 <0 50 <0 50 NR NR <br /> 06/22/95 <50 <0 50 <0 50 <0 50 <0 50 1136 -798 <br /> 09/26/95 <50 <0 50 <0 50 <0 50 <0 50 790 1235 -8 97 <br /> ' <br /> 12/21/95 <50 <0 50 <0 54 <0 50 <0 50 750 1224 -8 86 <br /> 03/06/96 <250 <2 50 <2 50 <2 50 <2 50 1,100 670 1067 -729 <br /> 06/04/96 <125 <1 2 <1 2 <1 2 <1 2 660 NR 1025 -687 <br /> 09/17/96 <50 <0 50 <0 50 <0 50 <0 50 510 NR 11 2 -7 82 <br /> 12/09/96 <50 <0 50 <0 50 <0 50 <0 50 350 NR 1129 -791 <br /> 02/11/97 <50 <0 50 <0 50 <0 50 <0 50 340 NR 875 -537 <br /> ' 06/09/97 <50 <0 50 <0 50 <0 50 <0 50 220 NR 966 -628 <br /> 09/03/97 <50 <0 50 <0 50 <0 50 <0 50 1,100 NR 1034 -696 <br /> 12/04/97 <50 <0 50 <0 50 <0 50 <0 50 880 NR 1075 -737 <br /> 03/10/98 <50 <0 50 <0 50 <0 50 <0 50 1 400 1 NR 1 1 695 1 -3 57 <br /> Well MW-SA <br /> 08/30/91 1 700 6 1 33 27 33 3 38 15 3 -1 l 92 <br /> 10/15/91 1,700 <0 50 <0 50 <0 50 <0 50 NA NA <br /> 05/05/92 360 <0 50 <0 50 <0 50 <0 50 NA NA <br /> 10/26/92 340 2 3 073 1 1 17 NA NA <br /> 03/02/93 79 <0 50 <0 50 <0 50 <0 50 1264 -926 <br /> 05/18/93 <50 <0 50 <0 50 <0 50 <0 50 NA NA <br /> 011/1,193 <50 <0 50 <0 50 <0 50 <0 50 1295 -957 <br /> 09/23/93 88 <0 50 <0 50 <0 50 <0 50 13 35 -997 <br /> 11/10/93 100 <0 50 0 55 <0 50 <0 50 13 88 -10 5 <br /> L02/08/94 <50 <0 50 <0 50 <0 50 <0 50 13 43 -1005 <br /> 510519.1 <50 <0 50 <0 50 <0 50 <0 50 1239 <br /> ATC Pl SSADNIINTASK\LCIilthiANIO(Jlk';TOP%1 —%[FdehTkBLC I Page 4 of 6 <br />