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Table 1 Page 6 of 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevation Elevation Change TPHg Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet MSL) (feet TOC) in feet {feet,MSL) ((feet) (ppb) (ppb) b b b) (ppb) (mg/1) <br /> ATR 4 04/15/93 - 810 160 42 47 63 <br /> {cont 08/31/93 (c) 1098 100 33 <0 5 6 13 <br /> 10/27/93 1098 200 12 1 2 79 16 <br /> 02/18/94 1031 950 140 5 73 30 <br /> 05/20/94 1071 8,100 590 59 190 220 <br /> 10/07/94 11 00 1,100 30 1 16 73 <br /> 12/16/94 1061 1,600 310 23 350 200 <br /> 02/28/95 1068 - 4,600 180 <5 750 100 -- -- <br /> 04/26/95 1094 1,100 19 <1 110 83 <br /> 07/27/95 11 11 - 1,700 12 <2 5 170 84 <br /> 10/26/95 1118 -- -- -- - <br /> 10/27/95 -- 600 7 <1 30 2 <br /> 02/12/96 1043 6,300 <0 5 <0 5 340 150 - <br /> 04/18/96 1077 770 <1 0 <1 0 41 1 9 <br /> 07/18/96 1052 2,600 12 <5 52 <5 560 <br /> 11/15/96 11 51 440 <0 5 <0 5 08 22 140 <br /> 03/14/97 11 57 - 150 is <0 5 <0 5 <0 5 870 007 <br /> 06/04/97 NP 1093 - 420 87 14 12 1 3 54 008 <br /> 08/11/97 NP 1055 320 24 1 1 <0 5 157 63 - <br /> 11/17/97 NP 11 20 420 3,3 14 <0 5 076 48 <br /> 03/30/98 NP 1038 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 1 <br /> 06/25/98 NP 1040 658 <0 5 <0 5 <0 5 <0 5 <5 0 1 <br /> 09/11/98 NP 11 06 <50 <0 5 <0 5 <0 5 <0 5 <2 5 084 <br /> 12/15/98 NP 1075 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 1 <br /> 03/17!99 NP 1053 <50 <0 5 <0 5 <0 5 <0 5 <5 0 67 <br /> 05/14/99 NP 1097 - <50 0 591 <0 5 <0 5 <0 5 8,720 20 <br /> 09/16/99 NP 1093 <50 <05 <05 <05 <05 <50 68 <br /> 12/22/99 NP 1089 <50 <0 5 <0 5 <0 5 <0 5 857 1 58 <br /> 02!29100 NP 1026 <50 <0 5 <0 5 <0 5 <0 5 <2 5 3 1 <br /> 06/07/00 NP 11 06 <50 <0 5 <0 5 <0 5 <0 5 842 - <br /> 09/25/00 NP 11 24 <50 <0 5 <0 5 <0 5 <0 5 280 070 <br /> 12J29100 P 1081 -- -- <50 0 <0 500 <0 500 <0 500 <0 500 636" 45 <br />