ARCHIVED REPORTS_GROUNDWATER MONITORING AND REMEDIATION REPORT - 3RD AND 4TH QUARTERS 2011

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TABLE 3 Page 48 of 66 GROUNDWATER DATA SHELL STOCKTON TERMINAL 3515 NAVY DRIVE,STOCKTON,CALIFORNIA MTBE MTBE Depth to GW SPH Well ID Date TRIM TPH9 B T E X 8020 8260 TBA DIPE ETBE TAME Ethawl Methawl Lead TOC Water Elea. Thickness DO (PP/L) OWIL) OWE) 419/M OTT) (YY/L) (P87L) (1191L) (Pg/L) (PPIL) (A91L) (P87L) (AS/L) (PP/L) (MPT) (ft MSL) ((t TOC) ((t MSL) (ft) (mg/L) MW-26 02/17/2005 <50 <50 <0.50 <0.50 <0.50 <0.50 - <0.5 - <0.5 - - - - - 3.61 4.10 -0.49 - 1.6 MW-26 05/12/2005 - - - - - - - - - - 3.61 5.94 -2.33 MW-26 08/30/2005 <50 60 <0.50 <0.50 <0.50 <0.50 - <0.50 - <OSO - - - - - 3.61 7.95 -3.84 - 0.9 MW-26 11/30/2005 - - - - _ - - - - - - - - - - 3.58 7.84 4.26 0.9 MW-26 02/02/2006 <50 <50 <0.50 <030 <0.50 <1.0 - <0.50 - <20 - - - - - 3.58 5.11 -1.53 25 MW-26 05/30/2006 - - - - - - - - 3.58 5.46 -1.88 MW-26 08/31/2006 <56 <50 <030 <0.50 <0.50 <1.0 - <0.50 - <2.0 - - - - - 3.58 7.14 -3.56 03 MW-26 11/16/2006 - - - - - - - - - - 3.58 7.18 -3.60 - 0.3 MW-26 02/26/2007 <53 bb <50 <0.50 <1.0 <0.50 <1.0 - <0.50 - <2.0 - - - - - 3.58 6.41 -2.83 - 02 MW-26 05/29/2007 - - - - - - - - 3.58 7.05 -3.47 MW-26 08/27/2007 420dbb <50 ee <0.50 <L0 <1.0 <1.0 - <L0 - 2.0 - - - - - 3.58 7.15 -3.57 - L1 MW-26 11/29/2007 - - - - - - - - - - - - - - 3.58 7.47 -3.89 MW-26 02/22/2008 <50 bb <50 ee <0.50 <1.0 1.6 2.98 t - <1.0 - <2.0 - - - - - 3.58 5.40 -1.82 - 1.2 MW-26 05/21/2008 - - - - - - - 3.58 7.30 -3.72 MW-26 08/28/2008 <50 <50 <0.50 <I.0 <1-0 <1.0 - 0.38 r <10 024 r 2.0 <2.0 - - 3.58 7.46 -3.88 - 3.40 MW-26 11/06/2008 - - - - - - - - - - 3.58 7.00 -3.42 MW-26 02/09/2009 Well inaccessible - - - - - - - - - - - - 3.58 - MW-26 05/07/2009 - - - - - - - - - 3.58 6.45 -287 - MW-26 08/31/2009 <50 <50 <0.50 <1.0 <1.0 <1.0 - 0.60r - 1.5r - - - - 3.58 7.35 -3.77 - p,g4 MW-26 11/12/2009 - - - - - - - - 3.58 7.14 -3.56 MW-26 02/03/2010 <50 45rff <0.50 <1.0 <1-0 <1.0 - Q.0 QO <2.0 <2.0 <2.0 - - 3.58 5.80 -222 - 0.91 MW-26 05/06/2010 - - - - - - - - - 3.58 s.70 -2.12 MW-26 08/30/2010 <30 <50 <0.50 <I.0 <I.0 <1.0 - <1.0 - 0.85r - - - - 3.58 7.35 -3.77 - 127 MW-26 12/03/2010 - - - - - - - - - - - - 3.58 6.81 -3.23 MW-26 02/18/2011 Unable to sample - - - - - 3.58 5.60 -202 MW-26 05/19/2011 <47 <50 <03 0 < 0 <0.50 <0.51.0 - <I.0 4.0 - - - 3.58 5.65 -2.07 - 0.71 MW-26 09/07/7011 <50 <50 <0.50 <0.50 <0.50 Q.0 - Q.0 - <1.0 - - - - - 6.51 7.05 -0.54 - 245 MW-26 12/062011 - - - - _ - - - - - - - - _ - 65I 7.25 -0.74 - - MW-27 09/29/1993 340 90 ND ND ND ND - - - - - - - - 3.72 7.91 1.19 MW-27 03/24/1994 360 90 ND ND ND ND - - - - - - 3.72 6.57 -2.85 - - MW-27 06/27/1994 520d ND ND ND ND ND - - - - - - - - - 3.72 7.13 -3.41 MW-27 09/27/1994 3,200 5,100 410 ND ND 48 - - - - - - - - 3.72 8.09 1.37 MW-27 12/28/1994 390 NO 2.6 0.87 0.69 24 - - - - - - - - - MW-27 03/13/1995 60 ND ND - 3.72 7.51 -3.79 ND ND ND - - - - - - - 3.72 3.37 3.7 - MW-27 06/15/1995 1,800 3,800 370 12 7.8 24 - - - - - - - - 3.72 6.56 -2.59 MW-27 09/11/1995 1,600 1,800 260 39 11 54 - - - - - - - - 3.72 5.02 -130 MW-27 11/13/1995 1,400 1,600 150 38 6.4 47 - - - - - - - - - 3.72 8.63 1.91 MW-27 03/20/1996 2,300 2,400 260 9.0 6.3 17 - - - - - - _ - 3.72 336 0.36 - MW-27 05/15/19% 72 ND ND NO ND ND - - - _ - - - - 3.72 5.85 -2.13 MW-27 08/12/1996 140 53 ND ND ND ND - - - - - - - - - 3.72 7.61 -3.89 - MW-27 10/28/19% 270 ND ND ND ND ND - - - - - - - - 3.72 825 1.53 - MW-27 03/03/1997 ND ND ND ND NND - - - - - - 3.72 5.27 -1.55 - D MW-27 05/05/1997 160 <50 <0.50 <0.50 <0.50 <0.50 - - - - - _ - - 3.72 6.60 -2.88 MW-27 08/18/1997 290 <50 <030 <030 <0.50 <0.50 - - - - - - - - - 3.72 8.17 1.45 - - ..o,am