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Table 1. Sutnmary of Groundwater Monitoring Data: Wafer Elevations and Analyses <br /> ARCO Facility 2133, Stockton, California <br /> Top-of-casing Depth-to- Product Water-level Change since Concentrations in 1. <br /> Well number elevation, feet water, thickness, elevation, last measurement, Total <br /> and date above mean sea level in feet 1n feet in feet(a) in feet Benzene Toluene Eth (benzene Xylenes TPI I-G MTBE <br /> 13HD-2 073 <br /> 8126188 -- -- -- -- -- -- -- --11/28/88 <br /> -- -- -- -- -- -- <br /> 2/27/89 -- -- -- -- -- -- -- -- -- <br /> 5130/89 -- -- -- -- -- -- -- <br /> 8/22/89 -- -- -- <0 5 <0 5 <0 5 <0 5 -- -- <br /> 12/4/89 -- -- -- -- -- -- -- __ <br /> 114190 1622 -- -1549 -- -- -- -- -- -- <br /> 2/1/90 -- <br /> 2/15/90 •- <br /> 2/22/90 -__- <br /> 3/8/90 15 78 -- -1505 0 44 <0 5 <0 5 <0 5 <0 5 -- <br /> 415190 15 85 -- -15 12 -007 <br /> 4/19/90 1592 -15 19 -007 -- -- -- -- -- _ <br /> 5110/90 1657 -- -15 84 -065 <br /> 5124190 1654 -- -15 81 003 -- <br /> 6/5/906/18/90 1663 -- -1590 -009 -- <br /> 7/12/90 1703 -- -1630 -040 -- -_ -- <br /> 8/16190 1721 -- -1648 -0 18 <br /> 9117/90 1770 -- -1697 -049 <0 5 <0 5 <0 5 <0 5 <br /> 10/1 1/90 1778 -- -1705 -008 <br /> 12/6190 1763 -1690 0 15 -- -- -- -- -- -- <br /> 2/11/91 1737 -1664 026 <05 <05 <05 <05 <50 <br /> 2/25/91 1735 -- -1662 002 <br /> 4/23191 1636 -- -1563 099 -- -- -- __ <br /> 7116191 1799 -- -1726 -1 63 <0 5 <0 5 <0 5 <0-5 <50 <br /> 10/8/91 1864 -- -1791 -065 <br /> 1/22192 1744 -- -1671 120 <br /> 4/22/92 1666 -- -1593 078 <0 5 <0 5 <0 5 <0 5 <50 - <br /> 7/29/92 18 13 -- -1740 -147 <0 5 <0 5 <0 5 <0 5 <50 . <br /> 10/29/92 1872 -- -1799 -059 <0 5 <0 5 <0 5 <0 5 <S0 <br /> 1/27/93 15 86 -- -15 13 286 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 3316%1 Alt r i\2133S1 P6 XI S <br />