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TO �of 17 <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 TPH-G Benzene Toluene Ethyibenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg1l) <br /> ATR4 10/26/95 1118 — — — -- -- -- -- -- -- - <br /> (cont) 10/27/95 — -- - — 600 7 <1 30 2 - <br /> 02112/96 1043 — - - 6,300 <0 5 <0 5 340 150 -- - <br /> 04/18/96 1077 — -- - 770 <1 0 <1 0 41 19 - - <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 1157 — - -- 150 15 <0 5 <0 5 <0 5 870 007 <br /> 06/04/97 NP 1093 -- — - 420 87 14 1 2 1 3 54 008 <br /> 08/11/97 NP 1055 — — -- 320 24 1 1 <0 5 57 63 -- <br /> 11/17/97 NP 1120 — -- -- 420 3,3 14 <0 5 076 48 -- <br /> 03130/98 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 <50 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 <0 5 <0 5 <0 5 <0 5 <5 0 68 <br /> 12/22/99 NP 1089 — — - <50 <0 5 <0 5 <0 5 <0 5 857 1 58 <br /> 02/29/00 NP 1026 — — - <50 <0 5 <0 5 <0 5 <0 5 <2 5 31 <br /> 06107/00 IMP 1106 <50 <0 500 <0 500 <0 500 <0 500 842 -- <br /> ATR-5 03/10/89 4873 — — — - 6,600 693 <5 0 327 7 -- <br /> 06/29/89 1052 — 3821 -- 2,200 490 24 280 1 3 — - <br /> 09/18/89 1098 — 3775 -046 1,000 68 1 1 63 58 <br /> 12/27/89 1076 -- 3797 022 2,200 94 2 150 <1 - - <br /> 04/18/90 1090 -- 3783 -014 1,900 120 26 68 140 - - <br /> 10/16/90 -- — -- — 1,000 18 47 79 16 -- -- <br /> 10/19/90 11 10 — 3763 -- -- -- -- -- -- — - <br /> 01/10/91 1084 — 3789 026 350 71 1 2 16 26 - <br /> 04/10/91 1067 — 3806 017 370 46 <0 5 7 <0 5 - <br /> 07/10/91 1102 — 3771 -035 1,200 95 <0 5 18 1 5 - - <br /> 09/24/91 1129 -- 3744 -027 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/23/92 1078 — 3795 051 180 14 1 5 1 5 <0 5 - <br /> 04/20/92 1070 — 3803 008 -- — -- -- -- -- - <br /> 04/21/92 — — -- -- 290 16 <0 5 2 <0 5 -- — <br /> 07/08/92 1097 — 3776 -- 240 <0 5 <0 5 06 <0 5 — -- <br /> 10/07/92 11 11 -- 3762 -014 -- — -- -- -- - -- <br /> ATR-5 10/08/92 — — — — 160 <0 5 <0 5 <0 5 <0 5 - <br />