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i <br /> TableT Pag. ,f 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 TPMg 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 /> ATR-7 04/18/90 1201 -- 3764 -007 <50 61 26 21 58 <br /> (cont) 10/16/90 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 1220 -- 3745 -- - - - - <br /> 01/10/91 -- -- -- <50 6 <0 5 1 8 4 1 <br /> 04/10/91 -- -- -- -- -- - <br /> 07/10/91 -- -- -' - <br /> 09/24191 1234 -- 3731 -- -- - -- -- <br /> 09/25/91 -- -- - <50 13 <0 5 <0 5 <0 5 <br /> 01/23/92 -- -- - -- <br /> 04/20/92 -- - - <br /> 07/08/92 -- - -- -' - - <br /> 10/07/92 1221 3744 - <br /> 10/08/92 -- -- -- <50 <0 5 <0 6 <0 5 <0 5 <br /> 01/18/93 1133 3832 -- - - <br /> 01/19/93 -- - -- -- <50 1 <0 5 06 <0 5 <br /> 04/14/93 1175 3790 - - - - - <br /> 04/15/93 -- - -- - <50 29 <0 5 <0 5 <0 5 <br /> 08/31/93 1224 3741 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 1223 3742 001 <50 <0 5 <0 5 <0 5 13 <br /> 02/18/94 1193 3772 030 <10 <0 3 <0 3 <0 3 <0 5 <br /> 05/20/94 1200 -- 3765 007 <10 <0 3 <0 3 <0 3 <0 6 <br /> 10/07/94 1223 3742 023 <50 <0 5 <05 <0 5 <0 5 <br /> 12/16/94 1194 -- 3771 029 <60 <0 6 <0 5 <0 5 <0 5 - <br /> 02128/95 1200 -- 3765 006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/25/95 1241 3724 -041 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1261 - 3704 020 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/26/95 1267 3698 006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/12/96 119S -- 3770 072 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/18/96 1235 -- 3730 -040 <50 <0 5 <0 5 <0 6 <0 5 <br /> 07/18/96 1246 3720 010 <50 <0 5 <0 6 <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 6 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 -- 3899 006 <50 <0 5 <0 6 <0 5 <0 5 35 - <br /> 03/30198 NP 1211 -- 3754 055 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 3 <br /> 06/25/98 NP 1246 -- 3719 -035 <50 <0 5 <0 5 <0 5 <0 5 <5 0 25 <br />