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Tab Pagof 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Stabon#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) (ppb) (ppb) (ppb) (ppb) (mgVl) <br /> ATR 1 04/23/87 5058 1249 -- 3809 -- <100 <0 5 <0 5 <0 5 23 <br /> 12/22187 1263 3795 -014 -- 5 9 <0 5 0 9 <0 5 <br /> 03/24/88 1254 -- 3804 009 -- <0 5 <0 5 <0 5 <0 5 <br /> 06/23/88 1283 -- 3775 -029 <0 5 1 3 4 3 2 2 <br /> 09/29/88 1301 -- 3757 018 <0 5 <0 5 <0 5 <0 5 - <br /> 02/22/89 1246 3812 055 <100 14 <0 5 <0 5 18 <br /> 06/21/89 1237 3821 009 520 360 0 8 2 1 36 <br /> 09/18/89 1288 -- 3770 -051 27,000 250 1,200 570 7,100 <br /> 12/27/89 1268 -- 3790 020 <50 3 4 <0 3 1 3 1 4 <br /> 04/18/90 1284 3774 -016 13 21 1 5 16 16 <br /> 10/16/90 -- -- -- -- <50 1 <0 5 2 2 -10/19/90 1310 3748 - -- - - - <br /> 01/10/91 1278 -- 3780 032 <50 2 4 <0 5 5 7 2 3 <br /> 04/10/91 1252 - 3806 026 73 1 3 <0 5 4 8 <0 5 <br /> 07/10/91 12 95 3763 -043 90 2 <0 5 4 7 17 <br /> 09/24/91 1330 3728 -035 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/23/92 1277 - 3781 053 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/20/92 1258 -- 3800 019 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 1290 3768 0 32 <50 <0 5 <0 5 0 6 <0 5 <br /> 10/07/92 1309 -- 3749 -019 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/18/93 -- -- -- -- - - - - - <br /> 04/14/93 1231 - 3827 - <50 <0 5 <0 5 15 <0 5 <br /> 08/30/93 1318 3740 0 87 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 1313 - 3745 005 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/18/94 1265 3793 048 17 0 6 1 1 0 8 <br /> 05/20/94 1271 - 3787 006 27 0 6 0 3 14 <0 5 <br /> 10/07/94 1314 -- 3744 043 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/94 1274 -- 3784 040 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/28/95 1265 -- 3793 009 <50 <0 5 <0 5 1 <0 5 <br /> 04/26/95 1290 -- 37 fib 025 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/27/95 1322 -- 37 36 0 32 - - - - <br /> 10/26/95 1340 -- 37 18 018 - - - <br /> 10/27/95 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 02/12/96 1230 -- 3828 -- 120 <0 5 <0 5 2 2 <0 5 -- <br /> 44€18l96 12 90 -- 37 68 0 60 -- -- -- <br /> 07/18/96 1328 -- 3730 0 38 <50 <0 5 <0 5 <0 6 <0 5 <5 <br />