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Table 1 Page 3 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) b b (ppb) b) b) (m I) <br /> 01/23/92 11 60 3762 042 <50 <0 5 <0 5 <0 5 <0 5 <br /> ATR 2 04/20/92 11 53 3769 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> (cont) 07/08/92 11 75 3747 022 <50 28 <0 5 <0 5 <0 5 <br /> 10/07/92 11 83 3739 008 59 57 <0 5 <0 5 <0 5 - <br /> 1118193 - -- - -- '" - -- <br /> 04/14/93 11 29 3793 - 55 38 07 08 1 9 <br /> 08/30/93 11 96 3726 -067 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 11 95 3727 001 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/18/94 11 54 3768 041 <10 07 09 <0 3 07 <br /> 05/20/94 11 61 3761 -007 <10 09 <0 3 <0 3 <0 5 <br /> 10/07/94 11 93 3729 032 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/94 11 56 3766 037 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/28/95 11 60 3762 -004 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/25/95 11 95 3727 -035 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1291 3631 -096 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/26/95 1226 3696 065 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/12/96 11 40 3782 086 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 11 90 3732 -050 <250 <2 5 <2 5 <2 5 <2 5 - <br /> 07/18/96 12 10 3712 020 <50 <0 5 <0 5 <0 5 <0 5 500 <br /> 11/15/96 1270 3652 -060 <50 <0 5 <0 5 <0 5 <0 5 750 <br /> 03/14/97 P 1270 3652 000 <50 <0 5 <0 5 <0 5 <0 5 280 008 <br /> 06/04/97 NP 1202 3720 068 <50 064 <0 5 <0 5 <0 5 480 006 <br /> 08/11/97 P 1233 3689 -031 <50 <0 5 <0 5 <0 5 <0 5 440 <br /> 11/17/97 P 1226 3696 007 <50 <0 5 <0 5 <0 5 <0 5 98 <br /> 03/30/98 NP 1182 3740 044 <50 <0 5 <0 5 <0 5 <0 5 18/20` 12 <br /> 06/25/98 NP 1205 3717 -023 <50 <0 5 <0 5 <0 5 <0 5 109 1 6 <br /> 09/11/98 NP 12 12 37 10 -007 <50 <0 5 <0 5 <0 5 <0 5 250 167 <br /> 12/15/98 NP 1201 3721 0 11 <50 <0 5 <0 5 <0 5 <0 5 <5 0 is <br /> 03/17/99 NP 11 65 3757 036 <50 <0 5 <0 5 <0 5 <0 5 <50 23 <br /> 05/14!99 NP 1205 37 17 -040 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 90 <br /> 09/16/99 NP 1223 3699 -0 18 <50 <0 5 <0 5 <0 5 <0 5 <5 0 37 <br /> 12/22/99 IVP 1214 3708 009 <50 <0 5 <0 5 <0 5 <0 5 <2 50 743 <br /> 02/29100 NP 11 50 3772 064 <50 <0 5 <0 5 <0 5 <0 5 483 5 1 <br /> 06/07100 NP 1211 3711 -061 <50 <0 5 <0 5 <0 5 <0 5 126 - <br /> 09/25/00 NP 12 11 3711 000 <50 <0 5 <0 5 <0 5 <0 5 141 030 <br /> 12/29100 P 1203 - 37 19 008 <50 0 <0 600 <0 500 <0 500 <0 500 89• 56 <br />