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Table 1. Summa of Groundwater Mon�Orin Data: <br /> Summary g Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations inµg/l, m <br /> Top-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 Eth lbenzene Xylenes TPH-G MTBE DO <br /> 2/28195 1160 -- 3762 -004 <0 5 <0 5 <0 5 <0 5 <50 - <br /> 4125195 1195 -- 3727 -0 35 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/27/95 12 91 -- 3631 -096 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/26/95 1226 -- 3696 065 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/12/96 1140 -- 37 82 086 <0 5 <0 5 <0 5 <0 5 <50 -_ <br /> 4/18/96 1190 -- 3732 -050 <2 5 <2 5 <2 5 <2 5 <250 <br /> 7118196 12 10 -- 37 12 -020 <0 5 <0 5 <0 5 <0 5 <50 500 -- <br /> 11/15/96 1270 -- 3652 -060 <0 5 <0 5 <0 5 <0 5 <50 750 <br /> 3114/97 1270 -- 3652 000 <0 5 <0 5 <0 5 <0 5 <50 280 008 <br /> 6/4197 NP 12.02 — 3720 068 064 <0 5 <0 5 <0.5 <50 480 006 <br /> ATR-3 <br /> 4123187 4993 1179 -- 38 14 »- 2300 180 <5 0 2300 17000 <br /> 12/22/87 1193 -- 3800 -014 5000 50 530 250 -- <br /> 3/24/88 1258 -- 3735 -065 8300 8700 4400 7800 43000 y <br /> 6123/88 11 17 -- 3876 141 6 -_ -- <br /> 160 4221 1800 4750 70000 -- -- <br /> 9129/88 1223 -- <br /> 37 70 -106 8850 17600 2190 8170 57400 -- -_ <br /> 2/22189 11 82 -- 38 11 041 1000 2100 480 2000 110000 -- <br /> 6/29/89 -- -- -- -- 890 520 250 1100 4500 <br /> 9/18/89 12 19 -- 3774 -- 1000 1300 460 2200 7400 -- <br /> 12/28/89 1201 -- 37 92 0 18 840 1400 840 5600 27000 -- <br /> 4/I8190 12 I5 -- 3778 -0 14 I000 490 340 1500 4800 <br /> 10/16/90 1235 -- 3758 -020 1900 1300 780 4600 14000 <br /> 10/19/90 1228 -- 3765 007 -- — _- <br /> 1/10191 1201 -- 3792 027 6I0 230 160 670 2600 <br /> 4/10191 1182 -- 3811 019 910 120 110 190 3000 <br /> 7/10/91 1223 -- 3770 -041 420 300 340 760 19000 <br /> 9/24191 12 57 -- 3736 -034 280 81 69 130 2000 -� <br /> 1123/92 12 12 Sheen 3781 045 -- __ -_ <br /> 4/20/92 1193 Sheen 3800 0 19 <br /> 718192 1222 Sheen 3771 -029 <br /> 1017192 1238 Sheen 3755 -0 16 <br /> 1118193 1122 Sheen 3871 1 16 <br /> 4114193 1149 Sheen 3844 -027 <br /> 8/30/93 1243 Sheen 3750 -094 <br /> 47471TA$LES12093JUN7 XLS <br />