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Table 2.Historical Groundwater Monitoring and Analytical Data <br /> ARCO Station No.4932,16 East Harding Way,Stockton,CA <br /> 7pt Product Water Level Concentrations in WJL <br /> Well ID and Elevation DTW Thickness Elevation GRO/ Ethyl- Total <br /> Date Monitored (feeq (feeq icknefeet) (tett) TPNg Benzene Toluene Benzene Xylenes MTBE Ethanol DIPE ETBE TAME TBA 1,2-DCA EDB Footnote <br /> EW-4 Cont. <br /> 10/27/2004 11.38 34.26 0.00 -22.88 6,900 600 600 600 <500 20,000 <br /> <100,000 <3,000 <3,000 <1,000 120, <500 <500 <br /> 1/12/2005 33.38 0.00 -22.00 6,900 <250 <250 <250 <250 15,000 60,000 <500 <500 600 clo, <250 <250 <br /> 4/13/2005 31.81 0.00 -20.43 60 <0.50 <050 <0.50 <050 12 - "- - - - -- <br /> 7/11/2005 30.34 0.00 -18.96 <1,200 <12 <12 <12 15 1,100 <2,500 <12 <12 <12 600 <12 <12 <br /> 10/5/2005 31.80 0.00 -20.42 1,600 N <10 <10 <10 <10 1,400 <2,000 <10 <10 <10 <400 <10 <10 • <br /> 1/13/2006 30.88 0.00 -19.50 <2,500 <25 <25 <25 <25 61 <15,000 <25 <25 <25 <3,000 <25 <25 <br /> 4/12/2006 28.66 0.00 -17.28 <2,500 <25 <25 <25 <25 <25 <15,000 <25 <25 <25 <1,000 <25 <25 <br /> 7/12/2006 26.86 0.00 -15.48 50 <0.50 <0.50 <0.50 <050 58 <300 <0.50 <0.50 <0.50 <20 0.91 <050 <br /> 10/19/2006 28.15 0.00 -16.77 <50 <0.50 <0.50 <0.50 <0.50 14 <300 IC50 <0.50 <0.50 <20 <050 <0.50 <br /> 3/13/2007 27.54 0.00 -16.16 290 <25 <2.5 <2.5 <25 330 <1,500 <2.5 <25 <25 <100 <2.5 <2.5 <br /> 5/15/2007 27.33 0.00 -15.95 - - - - <br /> 5/16/2007 27.68 0.00 -16.30 94N <0.50 <050 <0.50 <0.50 100 <300 <050 <0.50 <0.50 <20 0.85 <0.50 <br /> 8/1/2007 27.84 0.00 -16.46 - - - -- _ <br /> 8/2/2007 27.84 0.00 -16.46 60 <0.50 <0.50 <0.50 <0.50 47 <300 <050 <0.50 <050 <20 <050 <050 <br /> 11/20/2007 28.65 0.00 -17.27 - - -- -- - <br /> 11/21/2007 - - - 65 N <0.50 <050 <050 <0.50 100 <300 <050 <0.50 <0.50 <20 <050 <050 <br /> 1/21/2008 10.72 27.99 0.00 -17.27 -- - - -- - <br /> 1/23/2008 - - - 98 <0.50 <0.50 <050 <050 120 <300 <0.50 <050 <050 <20 0-70 <0.50 <br /> 4/7/2008 26.81 0.00 -16.09 - - - -- - -- - -" - - <br /> 4/8/2008 - - - <50 <0.50 <0.50 <050 <050 18 <300 <0.50 <0.50 <0.50 <1p <Os0 <050 <br /> 7/21/2008 28.18 0.00 -17.46 - - - - - -- - -- - - -- - - <br /> 8/22/2008 - - _ <50 <050 <0.50 <0.50 <0.50 230 <300 <0.50 <0.50 <050 <10 0.99 <050 <br /> 10/20/2008 29.68 0.00 -18.96 - - - -" - -- - -" - <br /> 10/21/2008 - - - <50 <0.50 <050 <050 <0.50 8.4 <300 <0.50 <0.50 <0.50 <10 0.77 <0.50 <br /> 1/19/2009 29.90 0.00 -19.18 _ _ _ 50 <br /> 1/20/2009 - -- - 60 <0.50 <050 <0.50 <0.50 41 <300 I50 <050 <0.50 <10 0.87 <- <br /> 4/20/2009 29.19 0.00 -18.47 - - - -- -- <br /> 4/21/2009 - - _ <50 <0.50 <050 <050 <050 0.88 <300 <0.50 <0.50 <0.50 <10 0.77 <0.50 <br /> 7/20/2009 30.25 0.00 -19.53 - - - "" - -- "" -- - -- - <br /> 1/5/2011 28.39 0.00 -17.67 -- <br /> Page 13 of 38 <br />