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' i • S . <br /> Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2133, Stockton, California <br /> Top-of-casing Depth-to- Product Water-level Change since Concentrations in L <br /> Well 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 Eth ]benzene Xylenes TPH-G MTBE <br /> 6/19/90 1920 -- -1578 -0 73 135 166 20 111 -- -- <br /> 7/12/90 1930 -- -15 88 -0 10 -- -- <br /> 8/16/90 <br /> -8/16/90 19 65 -- -1623 -035 -- -- -- <br /> 9/17/90 <br /> -9/17/90 1994 -- -1652 -029 -- -- -- _- -- <br /> 9/19/90 <br /> _9/19/90 1994 -16 52 000 90 82 14 110 680 10/11/90 20 03 -- -1661 -009 -- -_ _- -- __ <br /> 12/6/90 1897 -- -l 5 55 106 -- -- -_ -- <br /> 2/12/91 1953 -- -16 11 -0 56 120 13 21 300 1400 -- <br /> 2/25/91 1940 -- -1598 0 13 -- -- -- __ _- _. <br /> 4/23/91 1856 -- -15 14 084 22 <0 5 1 7 11 400 -- <br /> 7116/91 22 19 -- -18 77 -3 63 420 35 40 360 4100 -- <br /> 10/8/91 2173 -- -1831 046 410 19 62 380 5700 -- <br /> 1/22/92 2000 -- -1658 1 73 220 64 <14 120 6200 -- <br /> 4/22/92 1908 -- -1566 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 68 150 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 /> 8/5/93 1753 -- -14 11 -1 62 540 <130 200 550 54000 -- <br /> 11/10/93 1756 -- -1414 -003 290 120 95 280 30000 -- <br /> 3/21/94 1720 -13 78 036 220 16 39 170 4900 -- <br /> 6/27/94 1704 -- -1362 0 16 210 7 9 22 120 3400 -- <br /> 9/29/94 18 12 -- -1470 -1 08 180 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 /> 6/1/95 13 75 -- -1033 1 50 180 <17 50 71 8900 <br /> 9/11/95 1596 -- -1254 -2 21 38 <20 32 49 7500 -- <br /> 12/5/95 1634 -- -12 92 -038 13 <8 6 5 1 100 -- <br /> 3/18/96 1 1 00 -- -758 5 34 24 <0 5 4 3 6 5 2000 <br /> 6/18/96 1205 -- -863 -1 05 11 9 3 2 3 2 620 <5 <br /> 9125/96 1445 -- -11 03 -240 4 <0 5 1 5 3 3 400 <5 <br /> 12/4/96 13 93 -- -1051 052 3 5 <0 5 14 2 280 <5 <br /> 33161TABLES12133DEC6 XLS <br />