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i <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 Concentrathons in i /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 /> 1/27/93 1577 -- -1451 322 2500 540 1100 3100 31000 -- <br /> 4/29/93 13 96 -1270 1 81 2500 640 1400 4400 28000 -- <br /> 815193 1552 -1426 -1 56 3300 630 1700 5700 32000 -- <br /> 1 1/10/93 15 85 -- -1459 -033 2600 290 1500 4400 31000 -- <br /> 3/21/94 1529 -- -1403 056 2900 290 1700 4500 28000 -- <br /> 6/27/94 15 10 -- -1384 0 19 3000 180 1900 4100 25000 -- <br /> 9/29/94 16 l l -- -1485 -101 3200 150 1780 2900 27700 -- <br /> 12/8/94 15 71 -- -1445 040 3300 110 1700 3000 18000 -- <br /> 3/8/95 13 28 -- -1202 243 2100 260 1800 4000 38000 -- <br /> 6/1/95 1449 274 -11 31 071 -- -- -. _- -- <br /> 9/11/95 <br /> _9/11/95 1501 1 31 -12 83 -1 52 <br /> 12/5/95 1464 037 -13 12 -029 -- -- -- _- _. <br /> 3/18196 955 -- -829 483 7300 2200 9900 62000 370000 -- <br /> 6/18/96 8 87 -- -761 068 390 3600 2000 16000 400000 6200 <br /> 9125/96 1258 -- -11 32 -371 2100 3900 600 5100 28000 16000 <br /> 12/4/96 1205 -- -1079 053 3600 3900 1300 9800 55000 27000 <br /> E-Il 342 <br /> 8/26/88 -- _. __ <br /> 11/28/88 -- -- -- -- 440 380 110 460 -- -- <br /> 2/27/89 -- -- 400 250 120 820 -- <br /> 5/30/89 -- -- -- -- 437 162 97 281 -- -- <br /> 8/22/89 -- -- -- 160 36 38 220 -- -- <br /> 12/4/89 -- -- -- -- 240 26 38 290 -- -- <br /> 1/4/90 1839 -- -1497 -- -- -- __ -- <br /> 2/l/90 <br /> _2/1/90 18 19 -- -1477 020 <br /> 2115/90 18 16 -- -1474 003 <br /> 2122/90 1893 -- -1551 -077 -- -- -- __ <br /> 3/8/90 1791 -- -1449 1 02 80 1 313 756 242 -- <br /> 4/5/90 18 17 -- -1475 -026 -- -- -- -- <br /> 4/19/90 1825 -- -1483 -008 <br /> 5110/90 1855 -15 13 -030 <br /> 5/24/90 1850 -- -1508 005 <br /> 6/5/90 1847 -- -1505 003 -- -- -- -- -- -- <br /> 3316GABLES12133DEC6 XLS <br />