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TABLE 3 Page 62 of 66 HISTORICAL GROUNDWATER DATA SHELL STOCKTON TERMINAL 3515 NAVY DRIVE,STOCKTON,CALIFORNIA MTBE MTBE Depth to GW SPH Lead TOC Water Elea. Well ID Date (YS,L) � (P82) WIL) W&) (NEIL) (.8&) (V82) 0) ('60 TBA TgIL) �) &L) aigT)1 Methanol (M&L) qt MSL) ((t TOC) OMSW Thickness ("WL) <0.50 <0.50 <0.50 <7.0 - <0.50 22 7.4 - - - - - 3.22 6.76 -3.54 - - DW-2 05/20/2004 120 <50 - - - - - DW-2 08/16/2004 <50 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 44 9.9 - - - 3.22 7.63 -4.41 - 0.1 DW-2 11/29/2004 110 <50 <0.50 <0.50 <0.50 <.0 - <0.50 48 9.7 - - - 3.22 7.67 4.445 - 0.6/0.8 DW-2(D) ' 11/29/2004 110 <50 <0.50 <0.50 <0.50 Q.0 - <0.50 50 9.8 <0-50 <0-50 65,000 <1,000 - 322 - DW-2 02/17/2005 80 <50 <0.50 <0.50 <0.50 <0.5 - - 17 7.8 <5.0 <50 3.22 4,84 -1-62 - 11-4 DW-2(D) 02/17/2005 88 <50 <0.50 <0.50 <0.50 <0.5 - - 18 7-9 - - <5.0 � _ 3.� - - DW-2 05/12/2005 - - - - - - - _ _ - 3.22 5.80 -2.58 - DW-2 08/30/2005 73 <50 <0.50 <0.50 <0.50 <0.50 - - 67 9.0 - - <50 <100 3.22 7-05 -3-83 - 1-3 DW-2(D) 08/30/2005 70 <50 <0.50 <0.50 <0.50 <0.50 - <0,50 59 9-0 <0-50 <0-50 <50 <100 - 322 - DW-2 11/30/200.5 - - - - - - - - - 3.21 7.41 -420 - 6.0 DW-2 02/02/2006 <50 89P <0.50 <0.50 <0.50 Q.0 - - 18 lon - _ <Wn <500 - 3.21 5.10 -1.89 - 29 DW-2 05/30/2006 - - - - - - - - - - 3.21 5.39 -2.18 - DW-2 08/31/2006 140 <50 <0.50 <0.50 <0.50 Q.0 - - 17 3.5 - - <50 <100 3.21 6.91 -3.70 1.75 DW-2 11/16/2006 - - - - - - - - - - - 3.21 7.91 -4.70 - 1.75 DW-2 02/26/2007 <53 bb <50 <0.50 Q.0 <0.50 4.0 - - <5.0 <20 - - <50 <100 - 3.21 6.20 -299 21 DW-2 05/29/2007 - - - - - - - - - - - - - 3.21 6.81 -3.60. _ - DW-2 08/27/2007 200dbb <50 ee <0,50 <0.50 <0.50 <0.50 - - 36 9.0 - _ <50 <100 ee - 321 7.15 -3.94 - 21 DW-2 11/29/2007 - - - - - - - _ _ - 3.21 7.04 -3.83 - DW-2 02/22/2008 <50 bb <50 ee <0.50 <0.50 <0.50 <0.50 - <0.50 41 88-g <0.50 <0.50 <50 <100 ee - 321 5.45 -224 - 1.69 DW-2 05/21/2008 - - - - - - - - - - 321 7.15 -3.94 - 1.69 DW-2 08/28/2008 <50 53 032r <1.0 <1.0 <1.0 - <1.0 45 9-6 <20 <20 <100 560 ee - 3.21 6.75 -3.54 3.21 7.16 -3.95 - 1.34 DW-2 11/06/2008 - - - - - - - - -_ - 321 - - - - DW-2 02/09/2009 Well inaccessible - - - - - - - - - - 321 630 -3.09 - - DW-2 05/07/2009 - - - - - - - - - - - - 1.07 DW-2 08/31/2009 <50 <50 <OSO <1.0 d.0 <1.0 - - 38 7.1 - = Q00 <100 ee - 3.21 6.65 -3.3.21 8.59 -5.38 64 - DW-2 1112/2009 - - - - - _ _ _ _ _ - - - DW-2 02/03/2010 - - - - - - - - - - - - - = 3.21 6.70 -3.49 - DW-2 02/10/2010 95 d 42 ff r <0.50 <l.0 Q.0 <1.0 - <1.0 24 66-p <2B Q.0 <100 <100 ee - 3.21 10.60 -739 3.21 6.18 -297 - 1.37 DW-2 05/06/2010 - - - - - - - - - DW-2 08/30/2010 130d <50 <0.50 <1.0 Q.0 Q.0 - - 21 66-6 - _ <100 <100 ee -- 3.21 7.60 X1.39 - - 1.36 DW-2 12/03/2010 - - - - - _ _ _ 3.21 6.75 -3.54 - - DW-2 02/18/2011 Unable to sample - - - - - - - - - - - - - 321 5.20 -1.99 - 1 DW-2 -05/19/2011 63 4`0 <0.50 <0.50 <0.50 <1.0 - - 9.1 r 4-6 = _ <150 <500 ee - 3.21 5.40 -2.19 - 21 DW-2 09/07/2011 - - - - - - - - - - 6.15 654 -0- - 39 <0.50 <0.50 <0 .50 Q.0 - - 20 4.7 - - <350 <500 ee 6.15 1.56 DW-2 09/09/2011 460p <50 - - - - - 6.15 6.51 -036 - DW-2 12/06/2011 - - - - - - - - - - _ _ - - 12.91 - - - TW-1 06/30/2005 - - - - - - - - - - _ - - - - - - 13.45 - - 0.6 TWA 08/30/2005 - - - - - - - _ - TW-2 06/30/2005 - - - - - - - - - - - - - - - 13.53 - - 0.2 TW-2 08/30/2005 - - - - - - - - - - - _ _ _ - - - - - 1274 - - - TW-3 06/30/2005 - - - - - - - - - - - - - 13.50 - - 05 TW-3 08/30/2005 - - - - - - - - - - - ...w)