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• Table 1. Summary of Groundwater Mongrin Data: Water Elevations and Analyses <br /> s , <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations in�tg/L m <br /> Tap-of-casing Depth-to- product Water-level since last <br /> Well number elevation, water, thickness elevation, measurement, Total <br /> and date in feet(a) in feet in feet in feet(b) in feet Benzene Toluene Et lbenzene X lens TPH-G MTBE DO <br /> ATA-1 <br /> 4123187 5058 1249 3809 -- <0 5 <0 5 <0 5 23 <100 -- -- <br /> 12/22/87 12 63 37 95 -0 I4 5 9 <0 5 0 9 <0 5 _- <br /> 3/24/88 12 54 -- 3804 009 <0 5 <0 5 <0 5 <0 5 -- -- __ <br /> 6/23188 12 83 3775 -029 <0 5 13 4 3 2 2 <br /> 9129/88 1301 -- 3757 -0 18 <0 5 <0 5 <0 5 <0 5 -- -- -- <br /> 2122/89 1246 -- 38 12 0 55 14 <0 5 <0 5 1 8 <100 -- -- <br /> 6/21/89 1237 -- 3821 009 360 0 8 2 1 36 520 -- -- <br /> 9/18/89 I2 88 -- 3770 -0 51 250 1200 570 7100 27000 -- -- <br /> 12/27/89 1268 -- 3790 020 3 4 <0 3 13 14 <50 -- -- <br /> 4/I8/90 1284 -- 3774 -016 21 15 16 16 13 -- -- <br /> 10/16/90 -- -- -- 1 <0 5 2 2 <50 -- -- <br /> 10/19/90 13 10 -- 3748 <br /> 1/10/91 1278 -- 3780 0 32 24 <0 5 5 7 2 3 <50 -- <br /> 4/10/91 12 52 -- 3806 026 13 <0 5 4 8 <0 5 73 -- <br /> 7/10/91 12 95 -- 3763 -0 43 2 <0 5 4 7 17 90 -- <br /> 9/24/91 1330 -- 3728 -035 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 1/23/92 1277 -- 3781 053 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/20/92 1258 3800 0 19 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 718/92 1290 3768 -032 <0 5 <0 5 0 6 <0 5 <50 -- -- <br /> 10/7/92 1309 -- 37 49 -0 19 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 1/18/93 __ -_ -- -- -- -- -- -- -- -- <br /> 4/14/93 1231 -- 3827 -- <0 5 <0 5 15 <0 5 <50 -- -- <br /> 8/30/93 13 18 -- 3740 -0 87 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/27/93 13 13 -- 3745 005 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/18/94 1265 -- 37 93 048 0 6 1 1 0 8 17 -- <br /> 5/20/94 1271 -- 3787 -006 0 6 03 14 <0 5 27 -- -- <br /> 1017194 13 14 -- 3744 -043 <0 5 <0 5 <0 5 <0 5 <50 <br /> 12/16/94 1274 -- 3784 040 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/28/95 1265 37 93 009 <0 5 <0 5 1 <0 5 <50 -- -- <br /> 4/26/95 1290 -- 3768 -025 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 7/27195 1322 -- 3736 -032 <br /> 10/26/95 13 40 -- 3718 -0 18 <br /> 10/27/95 -- -- -- -- <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 2/12/96 1230 3828 -- <0 5 <0 5 2 2 <0 5 120 -- -- <br /> 47471TABLE512093J M7 XLS <br />