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Table 1. Summary of Groundwater Moni*ng Data- Water Elevations and Analyses <br /> ARCO Facility 2133, Stockton, California <br /> Top-of-casing Depth-to- Product Water-level Chance since Concentrations in pg/L mglL <br /> Wel]number elevation, feet water, thickness, elevation, last measurement, Total <br /> and date above mean sea level in feet in feet in feet(a) in feet Benzene Toluene Ethylbenzene Xylenes TPH-G MTBE DO <br /> 6119/90 1920 -- -1578 -073 135 16 6 20 I'll <br /> -- --7/12190 1930 -- -15 88 -0 10 <br /> 8/16/90 19 65 -- -1623 -035 <br /> 9/17/90 1994 -- -1652 -029 <br /> 9/19/90 1994 -- -1652 000 90 8 2 14 Ho 0 680 -- -- <br /> 10/11/90 2003 -- -1661 -009 <br /> 12/6/90 1897 -- -15 55 106 <br /> 2/12/91 1953 -- -16 11 -056 120 13 21 300 1400 -- -- <br /> 2125191 1940 -- -1598 0 13 <br /> 4123191 1856 -- -15 14 0 84 22 <0 5 17 11 400 -- -- <br /> 7/16/91 22 19 -- -1877 -363 420 35 40 360 4100 -- -- <br /> 10/8/91 21 73 -- -18 31 046 410 19 62 380 5700 -- -- <br /> 1122/92 2000 -- -1658 173 220 64 <14 120 6200 -- -- <br /> 4/22/92 1908 -- -l 5 66 092 570 57 150 510 14000 -- -- <br /> 7/29/92 2064 -- -1722 -1 56 790 36 280 830 21000 -- -- <br /> 10/29/92 21 00 -- -1758 -036 390 <20 68 I50 6600 -- -- <br /> 1/27/93 1768 -- -1426 332 830 180 390 950 51000 -- -- <br /> 4/29/93 1591 -- -1249 177 530 <100 156 730 28000 -- -- <br /> 8/5193 17 53 -- -1411 -162 540 <130 200 550 54000 -- -- <br /> 11/10/93 17 56 -- -14 I4 -003 290 120 95 280 30000 -- -- <br /> 3/21/94 1720 -- -13 78 036 220 16 39 170 4900 -- -- <br /> 6/27/94 1704 -- -13 62 0 16 210 7 9 22 120 3400 -- -- <br /> 9/29/94 18 12 -- -1470 -108 180 13 24 65 2200 -- -- <br /> 12/8/94 1773 -- -1431 0 39 150 7 9 25 28 1800 -- -- <br /> 3/8/95 1525 -- -11 83 248 85 <17 35 32 8600 -- <br /> 6/1195 13 75 -- -1033 150 180 <17 50 71 8900 -- -- <br /> 9/11/95 15 96 -- -12 54 -2 21 38 <20 32 49 7500 -- -- <br /> 12/5195 1634 -- -12 92 -038 13 <8 6 5 1100 -- -- <br /> 3/18/96 1100 -- -7 58 534 24 <0 5 4 3 6 5 2000 -- <br /> 6/18/96 12 05 -- -863 -105 11 9 3 2 3 2 620 <5 -- <br /> 9/25196 1445 -- -1103 -240 4 <0 5 1 5 3 3 400 <5 -- <br /> 1214196 1393 -- -1051 052 3 5 <0 5 14 2 280 <5 <br /> 3119197 NP 950 -- -608 443 <0 5 <0 5 <0 5 <0 5 <50 -- 1 05 <br /> 6(5(97 NP 11 17 -- -775 -167 <0 5 <0 5 <0 5 <0 5 <50 <5 1 46 <br /> 8119/97 NP r-- 1264 1 -922 1 -147 <05 <05 <0 5 <0 5 <50 <5 1 67 <br /> 47571TABLESU133AUG7 XLS <br />