ARCHIVED REPORTS_GROUNDWATER MONITORING REPORT - THIRD QUARTER 2013

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TABLE 1 Page 7 of 9 GROUNDWATER DATA FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDESRANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth m&p- o- XylenesWel1ID Snmple Date TOC Surface Water Wnter GWEleo to SPH TGic/neess TPHc TPHd BaLUne Toluene Ethylbeuzene Xylenes Xylnie (total) TOS (ft MSL) (ftMSL) (ft TOC) (ft bgs) (ft MSL) (feet) (feet) (PNE) (prL) (pg/L) (pg/L) (µgv OWL) (pg,,) (µSIL) (mg/L) MW-13C 3/22/2012 123.71 120.64 56.14 53.07 67.57 - - 4,4001 - <0.50 <0.50 <0.50 <.0 MW-13C 6/28/2012 123.71 120.64 56.55 53.48 67.16 - - <240/<240b - <0.50 <0.50 <0.50 <1.0 MW-13Cf 9/18/2012 123.71 120.64 58.00 54.93 65,71 - - 2,800a/2,500 ab - <0.50 <.D <1.0 <1.0 MW-13Cg 9/18/2012 - - - - - - - 1,400/680 b,e - - _ _ MW-13C 1/11/2013 123.71 120.64 56.35 53.28 67.36 - - 3,700 4/200 ab - <0.50 <.0 <.0 - _ <1.0 _ MW-13C 3/5/2013 123.71 120.64 55.90 5283 67.81 - - _ _ MW-13C 4/25/2013 123.71 120.64 59.79 56.72 63.92 - - <250/<250 b - <0.50 <1.0 <1.0 <1.0 MW-13C 7/15/2013 123.71 120.64 57.63 54.56 66.08 - - 350/<250b - <0.50 <.0 <1.0 <.0 <.0 <.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 - - <.0 MW-14B 11/30/2011 120.66 117.42 33.33 30.09 87.33 - - - 211b <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 <.0 MW-14B 6/28/2012 120.66 117.42 33.55 30.31 87.11 - - 11400/770 b - <0.50 <0.50 <0.50 - - <1.0 MW-14Bf 9/18/2012 120.66 117.42 3236 29.12 88.30 - - 310/<250b - <0.50 <.0 <.0 <1.0 MW-14B g 9/18/2012 - - - - - - - 550/<240b,e - _ _ MW-14B 1/11/2013 120.66 117.42 33.50 30.26 87.16 - - 2,900 a,/2,800 ab - <0.50 <.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 <10 MW-14B 7/15/2013 120.66 117.42 33.82 30.58 86.84 - - 1,400/1,100 b,k - <0.50 <.0 <.0 <.0 <.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 - - <490 <95b <0.50 <0.50 <050 - - <3.0 MW-14C 11/30/2011 120.64 117.43 55.81 5260 64.83 - - - <47.2b <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 n1520 ab - <0.5D <.0 <1.0 <1.0 MW-14C g 9/18/2012 - - - - - - - 930/450 be - - _ _ MW-14C 1/11/2013 120.64 117.43 55.00 51.79 65.64 - - 7100/690 ab - <0.50 <1.0 <1.0 <,p MW-14C 3/5/2013 120.64 117.43 5424 51.03 66.40 - - MW-14C 4/25/2013 120.64 117.43 54.20 50.99 66.44 - - <250/<250b - <0.50 <.0 <1.0 <1.0 MW-14C 7/15/2013 120.64 117.43 56.19 5298 64.45 - - <250/<250b - <0.50 <.0 <.0 <3.0 <1.0 <1.0 - MW-15 8/25/2011 127.06 12405 40.18 37.17 86.88 - _ _ a;aosovs oa)