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TABLE3 Page 12 of 66 HISTORICAL GROUNDWATER DATA SHELL STOCKTON TERMINAL 3515 NAVY DRIVE,STOCKTON,CALIFORNIA MTBE MTBE Depth to GW SPH Wellen Date TPHd TPHg B T E X 8020 8260 TBA DIPS ETRE TAME Ethanol Methanol Lead TOC Water Elea. Thickness DO OWL) Orgy 6'gJ OWE) 4%,%) (pg/W (pg/L) (pglL) (pg4,) O ld W) (pg&) 6'7/L) 6WL) (mg/W (ft MSL) (ftTOC) (ft MSL) (ft) (mg/L) MW-6 08/30/2010 - - - - - - - - - - - - - - - 11.43 12.02 -0.59 - - MW-6 08/31/2010 <50 39 r,H <0.50 <3.0 Q.0 <1.0 - - - - - - - - - 11.43 - - - 0.81 MW-6 12/03/2010 - - - - - - - - - - - - - 11.43 122 -0.77 - - MW-6 02/18/2011 - - - - - - - - - - - - - - - 11.43 11.47 -0.04 - - MW-6 05/19/2011 - - - - - - - - - - - - - - - 11.43 10.69 0.74 - - MW-6 09/07/2011 <50 <50 <0.50 <0.50 <0.50 <1.0 - - - - - - - - - 14.33 11.74 259 - 0.84 MW-6 12/06/2011 - - - - - - - - - - - - - 14.33 12.35 1.98 - - MW-7 08/01/1990 ND ND ND ND ND ND - - - - - - - - - - - - - - MW-7 02/01/1991 ND ND ND ND ND ND - - - - - - - - - - - - - - MW-7 08/08/1991 ND ND ND ND ND ND - - - - - - - - - 1287 14.83 -1.96 - - MW-7 02/27/1992 ND ND ND ND ND ND - - - - - - - 1287 13.15 -028 - - MW-7 08/13/1992 ND ND ND ND ND ND - - - - - - - 1287 14.65 -1.78 - - MW-7 03/25/1993 ND ND ND ND ND ND - - - - - - - - - 12.87 11.68 1.19 - - MW-7 09/29/1993 ND ND ND ND ND ND - - - - - - - - - 1287 14.33 -L46 - - MW-7 03/24/1994 - - - - - - - - - - - - - 1287 13.59 -0.72 - - MW-7 06/27/1994 130d ND ND ND ND ND - - - - - - - 1287 14.23 -1.36 - - MW-7 09/27/1994 - - - - - - - - - - - - - - - 1287 - - - - MW-7 12/28/1994 ND ND ND ND ND ND - - - - - - - - - 12.87 14.83 -1.96 - - MW-7 03/13/1995 - - - - - - - - - - - - - - - 12.87 1255 0.32 - - MW-7 06/15/1995 ND ND ND ND ND ND - - - - - - - - - 12.87 12.48 0.39 - - MW-7 09/12/1995 - - - - - - - - - - - - - - - 12.87 13.80 -0.93 - - MW-7 11/13/1995 88 150 3.9 25 3.8 32 - - - - - - - - - 12.87 14.51 -1.64 - - MW-7 0.3/20/1996 - - - - - - - - - - - - - 12.87 10.41 2.46 - - MW-7 05/15/1996 140 ND ND ND ND ND - - - - - - - - - 1287 11.85 1.02 - - MW-7 08/12/1996 - - - - - - - - - - - - - - - 1287 13.52 -0.65 - - MW-7 10/28/1996 73 ND ND ND ND ND - - - - - - - - - 1287 14.95 -2.08 - - MW-7 03/03/1997 52 ND ND ND ND ND - - - - - - - - - 1287 1127 1.60 - - MW-7 05/05/1997 - - - - - - - - - - - - - - - 1287 12.47 0.40 - - MW-7 08/18/1997 63 <50 <0.5 <0.5 <0.5 <0.5 - - - - - - - - - 1287 14.33 -1.46 - - MW-7 11/18/1997 - - - - - - - - - - - - - 1287 13.90 -1.03 - - MW-7 03/24/1998 68 <50 <0.5 <0.5 <0.5 <0.5 - - - - - - - - - 1287 9.21 3.66 - - MW-7 06/02/1998 - - - - - - - - - - - - - - - 12.87 10.58 2.29 - - MW-7 09/02/1998 - - - - - - - - - - - - - - - 1287 1241 0.46 - - MW-7 11/09/1998 - - - - - - - - - - - - - - - 1287 13.55 -0.68 - - MW-7 03/29/1999 <50 76 4.5 4.1 22 13 - - - - - - - - - 1287 12.75 0.12 - - MW-7 06/15/1999 - - - - - - - - - - - - - 1287 12.31 0.56 - - MW-7 09/14/1999 - - - - - - - - - - - - - - - 1287 1210 0.77 - - MW-7 12/20/1999 - - - - - - - - - - - - - - - 1287 13.06 -0.19 - - MW-7 02/24/2000 <50 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 - - - - - - - - 1287 12.38 0.49 - - MW-7 04/27/2000 - - - - - - - - - - - - - - - 12.87 12.49 0.38 - - MW-7 08/10/2000 Well inaccessible - - - - - - - - - - - 1287 - - - - MW-7 08/25/2000 Well inaccessible - - - - - - - - - - - - - 12.87 - - - - MW-7 08/28/2000 143 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 - - - - - - - - 1287 13.95 -1.08 - - MW-7 11/02/2000 - - - - - - - - - - - - - - - 1287 14.06 -1.19 - - auuimo3�