ARCHIVED REPORTS_SITE INVESTIGATION AND WELL DESTRUCTION PERMIT

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TABLE 3 Page 8 of 9 GROUNDWATER DATA FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDES RANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth to Well ID Sample Dade TOC Surface Water Water GW Elev SPH Thickness TPHC TPHd Benzene Toluene Eth (benzene X lenes X lene Well yMSL ft MSL ft TOC ft b9s ft MSL feet feet (µ9/L/ µ9/L p9/L 9 9/L µ9/L Y Y (total) TOS ft µ9/L P9/L R9/L m9/L MW-15 8/25/2011 127.06 124.05 40.18 37.17 86.88 MW-15 9/8/2011 127.06 124.05 39.98 36.97 87.10 39.95 0.03 _ _ MW-15 11/30/2011 127.06 124.05 40.04 37.03 87.07. 85.60 41.45 0.06 _ _ 39.98 0.06 _ _ _ - - - MW-15 3/22/2012 127.06 124.05 41.51 3850 _ - - MW-15 6/27/2012 127.06 124.05 40.35 37.34 85.73 40.32 0.03 _ _ MW-15 8/24/2012 127.06 124.05 40.93 37.92 86.16 40.89 0.04 _ __ _ - - MW-15 9/18/2012 127.06 124.05 39.77 36.76 87.31 39.74 0.03 _ - - - MW-15 11/2/2012 127.06 124.05 39.75 36.74 87.33 39.72 0.03 _ _ - - - - MW-15 11/30/2012 Unable to access due to weather conditions - MW-15 12/28/2012 127.06 124.05 39.95 36.94 87.13 39.93 0.02 _ _ MW-15 1/11/2013 127.06 124.05 40.72 37.71 86.38 40.67 0.05 _ _ MW-15 2/21/2013 127.06 124.05 40.38 37.37 86.69 40.37. 0.01 _ _ MW-15 3/5/2013 127.06 124.05 40.58 37.57 86.50. 86.30 40.75 0.05 4056 0.02 __ _ _ - - MW-15 4/25/2013 127.06 124.05 40.80 3779 _ - MW-15 5/24/2013 127.06 124.05 40.50 37.49 86.30 40.48 0.02 _ MW-15 6/18/2013 127.06 124.05 40.58 37.57 86.49 40.57 0.01 _ MW-15 7/15/2013 127.06 124.05 40.16 37.15 86.92 40.14 0.02 MW-15 8/15/2013 127.06 124.05 40.01 37.00 87.06 40.00 0.01 MW-35 9/30(2013 127.06 124.05 39.45 36.44 87.61 - MW-15 10/30/2013 127.06 124.05 40.32 37.31 86.76 40.30 0.02 MW-15 11/25/2013 127.06 124.05 39.38 36.37 87.70 39.36 0.02 MW-35 12/17/2013 127.06 124.05 39.56 36.55 87.51 39.55 0.01 MW-15 1/23/2014 127.06 124.05 40.25 37.24 86.82 40.24 0.01 MW-15 2/18/2014 127.06 124.05 40.64 37.63 86.44 40.62 0.02 MW-15 3/21/2014 127.06 124.05 41.07 38.06 86.00 41.06 1 0.0 MW-15 4/15/2014 127.06 124.05 41.00 37.99 86.06 NM .0 MW-15 5/8/2014 127.06 124.05 41.15 38.14 85.91 NM NM - MW-16 6/26/2014 126.45 122.94 40.26 36.75 86.19 - - <250 MW-16 7/28/2014 126.45 122.94 40.70 37.19 85.75 - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - - <250 - - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 FB-1 7/28/2014 - - - _ ' - - <250 - <0.50 <1.0 <1.0 d.0 <1.0 <1.0 EB-1 7/28/2014 - _ _ _ - - - 250 - <0.50 <1.0 <1.0 TB-1 7/28/2014 - C.060M(37)