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TABLE 1 Page 6 of 12 GROUNDWATER DATA SHELL-BRANDED SERVICE STATION 4315 WATERLOO ROAD STOCKTON,CALIFORNIA MTBE MTBE 1,2- Depth to GW Well ID Date TPPH B T E X 8020 8260 TBA DIPS ETBE TAME DCA EDB Ethanol TOC Water Elevation 991L 981L µg1L Ft91L 991L µNL 981L Etg/L 991L 991L 991L 991 48/L µ8/L ft MSL ft TOC ft MSL MW-4 12/13/2004 Insufficient water - - - - - - - - - - - 31.62 71.05 -39.43 MW-4 .1/5/2005 Insufficient water - - - - - - - - - - - - 31.62 71.26 -39.64 MW-4 3/7/2005 180 d <0.50 <0.50 <0.50 <1.0 - <0.50 - - - - - 31.62 68.37 -36.75 MW-4 6/1/2005 110 d <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 - - - - - - 31.62 63.42 -31.80 MW-4 9/20/2005 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 <2.0 <2.0 <2.0 - - <50 31.62 70.85 -39.23 MW-4 12/19/2005 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 - - - - - - 31.62 65.55 -33.93 MW-4 3/22/2006 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 - - - <0.50 = - 31.62 59.43 -27.81 MW-4 5/31/2006 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <20 - - - - - 31.62 54.54 -22.92 MW-4 9/25/2006 <50 <0.50 <0.50 <0.50 <1.0 - 0.83 23 <2.0 <2.0 <2.0 - - <50 31.62 59.96 -28:34 MW-4 12/11/2006 <50 <0.50 1.4 <0.50 3.6 - <0.50 <5.0 - - 31.62 58.16 -26.54 MW-4 3/14/2007 <50 <0.50 <0.50 <0.50 <1.0 - 0.85 9.2 - - - - - - 31.62 58.64 -27.02 MW-4 6/19/2007 <50j <0.50 <1.0 <1.0 <1.0 1.1 19 - - - - - - 31.62 60.78 -29.16 MW-4 9/20/2007 <50j <0.50 <1.0 <1.0 <1.0 - 0.56 g 6.1 g <2.0 <2.0 <2.0 - - <100 31.62 65.29 -33.67 MW-4 12/27/2007 <50j <0.50 <1.0 <1.0 <1.0 - <1.0 <10 - - - -_ - - 31.62 65.20 -33.58 MW-4 3/13/2008 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 - - - - - - 31.62 67.04 -35.42 MW-4 6/4/2008 <50 <0.50 <1.0 <1.0 <1.0 - ,<1.0 <10 - - - - 31.62 64.50 .-32.88 MW-4 9/18/2008 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.62 70.56 -38.94 MW-4 12/16/2008 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 - 31.62 70.62 -39.00 MW-4 3/16/2009 <50 <0.50 <1.0 <1.0 <1.0 <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 - 31.62 69.45 -37.83 MW-4 6/3/2009 - - - - - - - - - - - - - 31.62 70.91 -39.29 j MW-4 11/13/2009 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.62 70.92 -39.30 MW-4 6/21/2010 - - - - - - - - - - - - - - 31.62 65.97 -34.35 MW-4 12/22/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 - <100 31.62 67.32 -35.70 MW-4 5/25/2011 - - - - - - - - - - - - - - 31.62 60.32 -28.70 MW-4 11/4/2011 <50 <0..50 __!a.50 <0.50 --30:88---- -- - MW-4 3/1/2012 - - - - - - - - - - - - - - 31.62 60.44 -28.82 MW-5 12/22/2005 - - - - - - - - - - - - - 32.43 66.48 -34.05 CRA241359(14)