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To P*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 Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> (cont) 07/27/95 1261 -- 3704 -020 <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 10/26/95 1267 — 36 98 -006 <50 <0 5 <0 5 <0 5 <0 5 — <br /> 02/12/96 1195 -- 3770 072 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 04/18/96 1235 -- 3730 -040 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 07/18/96 1245 -- 37 20 -010 <50 <0 5 <0 5 <0 5 <0 5 28 <br /> 11/15/96 1311 — 3654 -066 <50 <0 5 <0 5 <0 5 <0 5 120 — <br /> 03/14/97 1320 -- 3645 009 <50 <0 5 <0 5 <0 5 <0 5 63 010 <br /> 06/04/97 NP 1244 — 3721 076 <50 <0 5 <0 5 <0 5 <0 5 <2 5 013 <br /> 08/11/97 NP 1272 — 3693 -028 <50 <0 5 <0 5 <0 5 <0 5 22 -- <br /> 11/17/97 NP 1266 -- 3699 006 <50 <0 5 <0 5 <0 5 <0 5 3 5 -- <br /> 03/30/98 NP 1211 — 3754 055 <50 <0 5 <0 5 <0 5 <0 5 <5 0 13 <br /> 06/25/98 NP 1246 — 3719 -035 <50 <0 5 <0 5 <0 5 <0 5 <5 0 2 5 <br /> 09/11/98 NP 1251 -- 3714 005 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 14 <br /> 12/15/98 NP 1241 — 3724 010 <50 <0 5 <0 5 <0 5 <0 5 <5 0 220 <br /> 03/17/99 NP 1223 -- 3742 018 <50 <0 5 <0 5 <0 5 <0 5 <50 2 00 <br /> 05/14/99 NP 1241 -- 3724 -018 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 90 <br /> 09/16/99 NP 1258 -- 3707 -017 <50 <0 5 <0 5 <0 5 <0 5 <5 0 360 <br /> 12/22199 NP 1252 -- 3713 006 <50 <0 5 <0 5 <0 5 <0 5 <2 50 420 <br /> 02/29/00 NP 1206 -- 3759 046 <50 <0 5 <0 5 <0 5 <0 5 <2 50 470 <br /> 06/07/00 NP 1255 -- 3710 -049 <50 <0 500 <0 500 <0 500 <0 500 572 -- <br /> A7R-8 08/25/91 4598 — -- — -- 2 700 110 <0 5 130 98 -- <br /> 09/25/91 885 — 3713 1,400 95 <0 5 51 97 - - <br /> 01/23/92 829 -- 3769 056 <50 25 <0 5 <0 5 <0 5 -- <br /> 04/20/92 811 -- 3787 018 -- — -- -- -- <br /> 04/21/92 -- -- -- -- 140 14 09 14 93 - <br /> 07/08/92 848 -- 3750 -- 87 4 0 <0 5 9 2 08 -- <br /> 10/07/92 869 — 3729 -021 -- — -- -- -- -- ' <br /> 10/08/92 -- — — -- 140 78 3 2 11 8 8 -- <br /> 01118/93 709 — 3889 — -- -- — -- -- - -- <br /> 01/19/93 — — — -- 980 140 17 11 34 — <br /> 04/14/93 780 -- 3818 - -- -- -- -- -- <br /> - ~ <br /> 04/15/93 — — -- — 110 4 2 <0 5 4 6 49 - <br /> 08/31193 981 -- 3617 -- 700 150 15 41 71 — <br /> 10/27/93 868 -- 3730 1 13 52,000 620 2100 2 800 8,700 -- - <br /> 02/17/94 825 014 3783 053 -- -- -- -- — -- — <br /> ASR-8 05!20194 855 014 3753 -030 -- - - - -- — <br /> (cont} 10/07/94 870 014 3738 -015 - -- - - -- <br />