ARCHIVED REPORTS_GROUNDWATER MONITORING REPORT - THIRD QUARTER 2014

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TABLE 1 Page 6 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/ TOS ft MSL ft MSL ft TOC ft bgs ft MSL feet feet (µg/Lf 49/L pg/L P9/L µ9/L µg/L µg/L µg/L mg/L MW-9 10/30/2013 123.91 121.31 35.17 32.57 88.74 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-9 1/23/2014 123.91 121.31 36.35 33.75 87.56 - - <250/<250b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-9 4/15/2014 123.91 121.31 37.35 34.75 86.56 - - <250/<250b - <0.50 <1.0 <1.0 <3.0 <1.0 <1.0 - MW-30 8/23/2010 124.16 121.72 36.64 34.20 87.52 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 - - MW-30 12/9/2010 124.16 121.72 36.30 33.86 67.86 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 1,080 MW-10 6/27/2011 124.16 121.72 37.65 35.21 86.51 - - <240 <47 b <0.50 <0.50 <0.50 - - <1.0 - MW-10 9/8/2011 124.16 121.72 36.48 34.04 87.68 - - <240 <49 b <0.50 <0.50 <0.50 - - <1.0 - MW-10 11/30/2011 124.16 121.72 36.13 33.69 88.03 - - - <48.5 b <0.50 <0.50 <0.50 - - <0.50 - MW-10 3/22/2012 124.16 121.72 37.72 35.28 86.44 - - <240 - <0.50 <0.50 <0.50 - - <1.0 - MW-10 6/27/2012 124.16 121.72 36.64 34.20 87.52 - - <240/<240 b - <0.50 <0.50 <0.50 - - <1.0 - M W-10 f 9/18/2012 124.16 121.72 35.50 33.06 88.66 - - <250/<250 b - <0.50 <1.0 <1.0 - - <1.0 - M W-10 g 9/18/2012 - - - - - - - 310/<240 b,e - - - - - - - - MW-10 1/11/2013 124.16 121.72 36.14 33.70 88.02 - - <250/<250b - <0.50 <1.0 <1.0 - - <3.0 - MW-10 4/25/2013 124.16 121.72 37.38 34.94 86.78 - - 280/<250b - <0.50 <1.0 <1.0 - - <1.0 - MW-10 7/15/2013 124.16 121.72 36.73 34.29 87.43 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-10 10/30/2013 124.16 121.72 35.48 33.04 88.68 - - <250/<250b - <0.50 <1.0 <1.0 <3.0 <3.0 <1.0 - MW-30 1/23/2014 124.16 121.72 36.57 34.13 87.59 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-30 4/15/2014 124.16 121.72 37.60 35.16 86.56 - - <250/<250b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-11 8/23/2010 123.70 121.33 36.10 33.73 87.60 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 - - MW-11 12/8/2010 123.70 121.33 35.86 33.49 87.84 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 1,230 MW-11 6/27/2011 123.70 121.33 37.25 34.88 86.45 - - <240 52b <0.50 <0.50 <0.50 - - <1.0 - MW-11 9/8/2011 123.70 121.33 36.04 33.67 87.66 - - <240 <48 b <0.50 <0.50 <0.50 - - <1.0 - MW-11 11/30/2011 123.70 121.33 35.70 33.33 88.00 - - - <47.6b <0.50 <0.50 <0.50 - - <0.50 - MW-11 3/22/2012 123.70 121.33 37.35 34.98 86.35 - - <240 - <0.50 <0.50 <0.50 - - <1.0 - MW-11 6/27/2012 123.70 121.33 36.19 33.82 87.51 - - <240/<240b - <0.50 <0.50 <0.50 - - <3.0 - M W-11 f 9/18/2012 123.70 121.33 35.05 32.68 88.65 - - <250/<250 b - <0.50 <1.0 <1.0 - - <1.0 - M W-11 g 9/18/2012 - - - - - - - <290/290 b,e - - - - - - - - MW-11 1/11/2013 123.70 121.33 35.72 33.35 87.98 - - <250/<250 b - <0.50 <1.0 <1.0 - - <1.0 - MW-11 3/5/2013 123.70 121.33 36.55 34.18 97.15 - - - - - - - - - - - MW-11 4/25/2013 123.70 121.33 36.90 34.53 86.80 - - <250/<250 b - <0.50 <1.0 <1.0 - - <1.0 - MW-11 7/15/2013 123.70 121.33 36.29 33.92 87.41 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-11 10/30/2013 123.70 121.33 35.03 32.66 88.67 - - 270/<250b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-11 1/23/2014 123.70 121.33 36.09 33.72 87.61 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 MW-11 4/15/2014 123.70 121.33 37.21 34.84 86.49 - - <250/<250b - <0.50 <1.0 <3.0 <1.0 <3.0 <1.0 MW-12 8/25/2011 124.82 121.89 37.36 34.43 87.46 - - - - - - - - - - - UA060223(37)