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TABLE 1 Page 7 of 9 GROUNDWATER DATA FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDES RANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth to m&p- o- Xylenes Well ID Sample Date TOC Surface Water Water GW Elev SPH Thickness TPHc Benzene Toluene Ethylbenzene Xylenes Xylene (total) TDS ft MSL ft MSL ft TOC ft b9s ft MSL feet feet (µg/L) MO/L µ9/L 1+6/L µ9/L µg/L Ng/L m0/L MW-13C 8/25/2011 123.71 120.64 58.14 55.07 65.57 - - - - - - - - - - MW-13C 9/8/2011 123.71 120.64 58.02 54.95 65.69 - - <240 <0.50 <0.50 <0.50 - - <1.0 - MW-13C 11/30/2011 123.71 120.64 57.31 54.24 66.40 - - - <0.50 <0.50 <0.50 - - <0.50 - MW-13C 3/22/2012 123.71 120.64 56.14 53.07 67.57 - - 4,4001 <0.50 <0.50 <0.50 - - <3.0 - MW-13C 6/28/2012 123.71 120.64 56.55 53.48 67.16 - - <240/<240b <0.50 <0.50 <0.50 - - <3.0 - • MW-13Cf 9/18/2012 123.71 120.64 58.00 54.93 65.71 - - 2,800a/2,500 a,b <0.50 <1.0 <3.0 - - <1.0 - MW-13C g 9/18/2012 - - - - - - - 1,400/680 b,e - - - - - - - MW-13C 1/11/2013 123.71 120.64 56.35 53.28 67.36 - - 3,200 a/2,400 a,b <0.50 <1.0 <1.0 - - <1.0 - MW-13C 3/5/2013 123.71 120.64 55.90 52.83 67.81 - - - - - - - - - - MW-13C 4/25/2013 123.71 120.64 59.79 56.72 63.92 - - <250/<250b <0.50 <1.0 <1.0 - - <1.0 - MW-13C 7/15/2013 123.71 120.64 57.63 54.56 66.08 - - 350/<250 b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-13C 10/30/2013 123.71 120.64 58.28 55.21 65.43 - - 590/460 b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-13C 1/23/2014 123.71 120.64 57.49 54.42 66.22 - - <250/<250 b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-14B 8/25/2011 120.66 117.42 36.82 33.58 83.84 - - - - - - - - - - MW-14B 9/8/2011 120.66 117.42 34.42 31.18 86.24 - - <240 <0.50 <0.50 <0.50 - - <1.0 - MW-14B 11/30/2011 120.66 117.42 33.33 30.09 87.33 - - - <0.50 <0.50 <0.50 - - <0.50 - MW-14B 3/22/2012 120.66 117.42 35.34 32.10 85.32 - - 530 1.4 <0.50 <0.50 - - <1.0 - MW-14B 6/28/2012 120.66 117.42 33.55 30.31 87.11 - - 1,400/770 b <0.50 <0.50 <0.50 - - <1.0 - MW-14Bf 9/18/2012 120.66 117.42 32.36 29.12 88.30 - - 310/<250b <0.50 <1.0 <1.0 - - <1.0 - MW-14B g 9/18/2012 - - - - - - - 550/<240 b,e - - - - - - - MW-14B 1/11/2013 120.66 117.42 33.50 30.26 87.16 - - 2,900 a/2,800 a,b <0.50 <1.0 <1.0 - - <1.0 - MW-14B 3/5/2013 120.66 117.42 34.48 31.24 86.18 - - - - - - - - - - MW-14B 4/25/2013 120.66 117.42 34.89 31.65 85.77 - - <250/<250 b <0.50 <1.0 <1.0 - - <1.0 - MW-14B 7/15/2013 120.66 117.42 33.82 30.58 86.84 - - 1,400/1,100 b,k <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - • MW-148 10/30/2013 120.66 117.42 27.87 24.63 92.79 - - <250/<250 b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-14B 1/23/2014 120.66 117.42 34.03 30.79 86.63 - - <250/<250b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-14C 8/25/2011 120.64 117.43 40.16 36.95 80.48 - - - - - - - - - - MW-14C 9/8/2011 120.64 117.43 56.52 53.31 64.12 - - <480 <0.50 <0.50 <0.50 - - <1.0 - MW-14C 11/30/2011 120.64 117.43 55.81 52.60 64.83 - - - <0.50 <0.50 <0.50 - - <0.50 - MW-14C 3/22/2012 120.64 117.43 54.58 51.37 66.06 - - 450 <0.50 <0.50 <0.50 - - <0.50 - MW-14C 6/28/2012 120.64 117.43 54.96 51.75 65.68 - - <240/<240b <0.50 <0.50 <0.50 - - <0.50 - MW-14Cf 9/18/2012 120.64 117.43 56.52 53.31 64.12 - - 600 a/520 a,b <0.50 <3.0 <1.0 - - <1.0 - MW-14C g 9/18/2012 - - - - - - - 930/450 b,e - - - - - - - MW-14C 1/11/2013 120.64 117.43 55.00 51.79 65.64 - - 710 a/690 a,b <0.50 <3.0 <1.0 - - <1.0 - MW-14C 3/5/2013 120.64 117.43 54.24 51.03 66.40 - - - - - - - - - - MW-14C 4/25/2013 120.64 117.43 54.20 50.99 66.44 - - <250/<250 b <0.50 <1.0 <1.0 - - <1.0 - MW-14C 7/15/2013 120.64 117.43 56.19 52.98 64.45 - - <250/<250 b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-14C 10/30/2013 120.64 117.43 56.95 53.74 63.69 - - <250/<250b <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - CM%0M(31)