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Table 2.Historical Groundwater Monitoring and Analytical Data <br /> ARCO Station No.4932,16 East Harding Way,Stockton,CA <br /> TOO Product Water Level Concentrations in Ng/L <br /> Well ID and Elevation DTW Thkduct Elevation GRO/ Ethyl- Total <br /> Date Monkored (feet) (feet) (feet) (feet) TPHg Bemene Toluene Benzene Xylenes MTBE Ethanol DIPS ETBE TAME TBA 1,2-DCA EDB Footnote <br /> SVE-1 Cont. <br /> 1/22/2008 10.94 - _ -- <50 <0.50 <0.50 40.50 <0.50 1.5 <300 <0.50 <0.50 <0.50 <20 3.2 <050 <br /> 4/7/2008 26.56 0.00 -15.62 - - - <br /> 4/9/2008 - -- - <50 <0.50 <0.50 <0.50 <0.50 2.3 <300 0.58 <0-50 <0.50 <10 3.8 <0-50 <br /> 7/21/2008 27.88 0.00 -16.94 - - - - - - - -- <br /> 8/22/2008 -- _ - <50 <0.50 <050 <0.50 <0.50 2.9 <300 0.66 <050 <0.50 <10 45 <050 <br /> 10/20/2008 29.20 0.00 -18.26 - - - <br /> 10/21/2008 - -- -- <50 <0.50 <0.50 <050 <050 3.7 <300 058 <0.50 <0-50 410 7.5 <0.50 <br /> 1/19/2009 29.50 0.00 -18.56 - - - - <br /> 1/22/2009 - - _ <50 <0.50 <050 <0.50 <0.50 3.1 <300 <0.50 <0.50 <0.50 <10 5.2 <050 <br /> 4/20/2009 28.75 0.00 -17.81 - - - - - - - <br /> 4/22/2009 - __ - <50 <0.50 <0.50 <0.50 <0.50 2.4 <300 <050 <0.50 <050 <10 45 <050 <br /> 1/5/2011 28.18 0.00 -17.24 - - - -- - - - -- <br /> 1/6/2011 -- - - <50 <0.50 <0.50 <D50 <0.50 <050 <300 <0.50 <050 <0.50 <10 <050 <050 <br /> 2/25/2013 24.55 0.00 -13.61 - - - -- - - <br /> 2/28/2013 - -- -- <50 <0.50 <050 <0.50 <1.0 0.93 - <0.50 <0.50 <0.50 <10 4.0 <050 <br /> SVE-2 <br /> 5/15/2007 NS 27.24 0.00 -- <50 <0.50 <0.50 <0.50 <0.50 2.8 <300 052 <0.50 <0.50 <20 3.2 <050 <br /> 8/3/2007 27.78 0.00 -- <50 <0.50 <0.50 <0-50 <0.50 4.7 <300 0.87 40.50 IC50 <20 5.6 <0.50 <br /> _ _ _ DRY <br /> 11/20/2007 - - <br /> 1/21/2008 11.16 27.91 0.00 -16.75 - - - -- <br /> 1/22/2008 - - __ <50 <0.50 <0.50 <050 <0.50 <0.50 <300 <O50 <0.50 <0.50 <20 <050 <0.50 <br /> 4/7/2008 26.82 0.00 -15.66 - - - -- <br /> - - - - <br /> 4/8/2008 - - -- <50 <0.50 <O50 <0.50 <0.50 3.1 <300 <050 <0.50 <050 <10 3.2 <0.50 <br /> 7/21/2008 _ -- <br /> 7/21/2008 <br /> _ _ _ __ _ VOL <br /> 28.10 0.00 -16.94 - - -- <br /> 10/20/2008 <br /> 29.98 0.00 -18.82 _ DRY <br /> _ DRV <br /> 1/19/2009 -- - - - - - -- _ <br /> DRY <br /> 4/20/2009 - -- - _ <br /> VOL <br /> 1/5/2011 <br /> 28.40 0.00 -17.24 - - -- - <br /> 2/25/2013 24.81 0.00 -13.65 <br /> 2/28/2013 - - - <50 <0.50 <0.50 <050 <1.0 <0.50 -- <0.50 <0.50 <0.50 <10 <0.50 <050 <br /> Page 37 of 38 <br />