ARCHIVED REPORTS_GROUNDWATER MONITORING REPORT - THIRD QUARTER 2014

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TABLE 1 Page 8 of 10 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 TPHd Benzene Toluene Ethylbenzene Xylenes Xylene (total) TDS If MSL ft MSL ft TOC fthgs ft MSL feet feet (pg/L) µg/L pg/L "A Hg/L lug/L WE Vg/L mg/L MW-13C 7/15/2013 123.71 120.64 57.63 54.56 66.08 - - 350/<250b - <0.50 <I.0 <1.0 <1.0 <1.0 <1.0 - MW-13C 10/30/2013 123-71 120.64 58.28 55.21 65.43 - - 590/460b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-13C 1/23/2014 123.71 120.64 57.49 54.42 66.22 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-13C 4/15/2014 123.71 120.64 56.70 53.63 67.01 - - 430/350b - <0.50 <1.0 <1.0 <3.0 <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 <47b <0.50 <0.50 <0.50 - - <1.0 - MW-14B 11/30/2011 120.66 117.42 33.33 30.09 87.33 - - - 211b <0.50 <050 <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 - - 1,400/7706 - <0.50 <0.50 <0.50 - - <1.0 - MW-14Bf 9/18/2012 120.66 117.42 32.36 29.12 88.30 - - 310/<250 b - <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 - - 2,900a/2,800a,b - <0.50 <1.0 <3.0 - - <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/<250b - <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 <3.0 <1.0 <1.0 <3.0 <3.0 - MW-14B 10/30/2013 120.66 117.42 27.87 24.63 92.79 - - <250/<250b - <0.50 <1.0 <1.0 <3.0 <1.0 <1.0 - MW-14B 1/23/2014 120.66 117.42 34.03 30.79 86.63 - - <250/<250b - <0.50 <3.0 <3.0 <1.0 <1.0 <1.0 - MW-14B 4/15/2014 120.66 117.42 34.92 31.68 85.74 - - 540/360 b - <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 <95 b <0.50 <0.50 <0.50 - - <1.0 - MW-14C 11/30/2011 120.64 117.43 55.81 52.60 64.83 - - - <47.2 b <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/<240 b - <0.50 <0.50 <0.50 - - <0.50 - MW-14C1 9/18/2012 120.64 117.43 56.52 53.31 64.12 - - 600a1520 ab - <0.50 <1.0 <3.0 - - <1.0 - MW-14Cg 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 <1.0 <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/<250b - <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 <3.0 <1.0 <1.0 <3.0 - MW-14C 10/30/2013 120.64 117.43 56.95 53.74 63.69 - - <250/<250b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-14C 1/23/2014 120.64 117.43 55.94 52.73 64.70 - - <250/<250b - <0.50 <3.0 <1.0 <1.0 <3.0 <1.0 - MW-14C 4/15/2014 120.64 117.43 55.11 51.90 65.53 - - <250/<250b - <0.50 <3.0 <1.0 <3.0 <1.0 <1.0 - 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 39.98 0.06 - - - - - - - - - C.0223 137)