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Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2133, Stockton, California <br /> "I op-of-casing Depth-to- Product Water-level Change since Concentrations in i L <br /> Well number elevation, feet water, thickness, elt valUon, last measurement, Total <br /> and date above mean sea level in legit in feet in feet(a) in feet Benzene Toluene Eth ibenzene Xylenes TPJ 1-G MI BE <br /> 6118190 Dry -- -- -- --7/12/90 18 19 -- -1590 -081 -- _- -- -- <br /> 8116/90 Dry -- -- -- -- -- <br /> 9/17/90 1832 -1603 -0 139/19/90 18 32 -- -1603 00010/11/90 Dry -- -- -- -- -- __ -- -- <br /> 12/6/90 Dry -- -- -- -- -- --2/11/91 1830 -- -1601 002 -- -- -- -_ <br /> 2125/91 1826 -- -1597 0 04 -- <br /> 4/23/91 1779 -- -1550 047 -- <br /> 7/15/91 Dry -- -- -- -- __ -_-_ -- -- <br /> 10/8/91 Dry -- -- -- -- -- -- -- <br /> 1/22/91 Dry -- -- -- -- -- -- <br /> 4122/92 Dry <br /> 7129/92 Dry <br /> 10/29/92 Dry -- <br /> 1/27/93 1669 -1440 1 10 2700 180 660 1900 57000 <br /> 4129193 1493 -- -1264 1 76 3400 140 930 2500 32000 <br /> 815/93 1670 -- -1441 -1 77 1800 69 670 1400 27000 <br /> 11/10/93 17 14 -14 85 -044 1700 <50 740 2000 47000 <br /> 3121/94 1660 -- -1431 054 1500 86 620 1500 24000 . <br /> 6127/94 1625 -- -13 96 035 1500 36 670 1400 19000 - <br /> 9129/94 1704 -- -1475 -079 1600 77 630 1300 24000 <br /> 12/8/94 1668 -- -1439 036 2700 58 890 1900 21000 <br /> 3/8195 1420 -1 1 91 248 1600 130 640 2600 94000 <br /> 6/1195 1268 -- -1039 152 1900 24 590 2500 58000 <br /> 9/11/95 1501 -- -1272 -233 1900 <50 640 1900 29000 _- <br /> 12/5/95 1522 -- -1293 -021 <br /> 3/18/96 1040 -- -8 11 482 480 12 390 660 15000 <br /> 6/18/96 11 05 -- -876 -065 -- <br /> 9/25/96 1352 -11 23 -247 160 <5 160 300 7600 <50 <br /> 331611A11L1 512133%1.1'6 Xt.S <br />