ARCHIVED REPORTS_SITE INVESTIGATION AND WELL DESTRUCTION PERMIT

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TABLE 3 Page 4 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 E/ev SPH Thickness TPHC TPHd Benzene Toluene Ethylbenzene Xylenes Xylene (total) TDS ft MSL ft MSL ft TOC ft bgs ft MSL feet feet (pg/L) µg/L µg/L µg/L WL IwIL pg/L 11g/1 mg/L MW-6 8/23/2010 123.09 120.50 35.64 33.05 87.45 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 MW-6 12/9/2010 123.09 120.50 35.41 32.82 87.68 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 1,140 MW-6 6/27/2011 123.09 120.50 36.70 34.11 86.39 - - <240 <47b <0.50 <0.50 <0.50 <1.0 MW-6 9/8/2011 123.09 120.50 35.47 32.88 87.62 - - <470 <94b <0.50 <0.50 <0.50 <3.0 MW-6 11/30/2011 123.09 120.50 35.08 32.49 88.01 - - - <47.2b <0.50 <0.50 <0.50 <0.50 MW-5 3/22/2012 123.09 120.50 36.96 34.37 86.13 - - <240 - <0.50 <0.50 <0.50 <1.0 MW-6 6/27/2012 123.09 120.50 35.60 33.01 87.49 - - <240/<240b - <0.50 <0.50 <0.50 <1.0 MW-6f 9/18/2012 123.09 120.50 34.43 31.84 88.66 - - <250/<250 b - <0.50 <1.0 <1.0 <1.0 MW-6 g 9/18/2012 - - - - - - - 550/<240 b,e - - _ _- MW-6 1/11/2013 123.09 120.50 35.24 32.65 87.85 - - <250/<250 b - <0.50 <1.0 <1.0 <1.0 MW-6 4/25/2013 123.09 120.50 36.33 33.74 86.76 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 MW-6 7/15/2013 123.09 120.50 35.76 33.17 87.33 - - 500/260 b,k - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 MW-6 10/30/2013 123.09 120.50 34.49 31.90 88.60 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <I.0 MW-6 1/23/2014 123.09 120.50 35.65 33.06 87.44 - - <250/<250 b - <O.50 <1.0 <1.0 <1.0 <1.0 <1.0 MW-6 4/15/2014 123.09 120.50 36.69 34.10 86.40 - - 290/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 - MW-7 8/23/2010 124.11 121.68 36.6 34.17 87.51 - - <250 <50 <050 <3.0 <1.0 <3.0 <3.0 MW-7 12/9/2010 124.11 121.68 36.23 33.80 87.88 - - <250 <50 <0.50 <1.0 <1.0 - <1.0 1,140 MW-7 6/27/2011 124.11 121.68 37.58 35.15 86.53 - - <240 <47b <0.50 <0.50 <0.50 - - <1,0 MW-7 9/8/2011 124.11 121.68 36.42 33.99 87.69 - - <470 <94b <0.50 <0.50 <0.50 <1.0 _ MW-7 31/30/2031 124.11 121.68 36.08 33.65 88.03 - - - <gg.56 <0.50 <O50 <0.50 - - <0..0 MW-7 3/22/2012 124.11 121.68 37.72 35.29 86.39 - - <240 - <0.50 <0.50 <0.50 <1.0 MW-7 6/27/2012 124.11 121.68 36.56 34.13 87.55 - - <240/260b - <0.50 <O.50 <0.50 <1.0 MW-7f 9/18/2012 124.11 121.68 35.48 33.05 88.63 - - <250/<250b - <0.50 <3.0 <1.0 - <1.0 MW-7g 9/18/2012 - - - - - - - 750/<240 b,e - - MW-7 1/11/2013 124.11 121.68 36.13 33.70 87.98 - - <250/<250 b - <0.50 <1.0 <1.0 <1.0 MW-7 4/25/2013 124.11 121.68 37.37 34.94 86.74 - - <250/<250b - <0.50 <1.0 <1.0 - - <1.0 MW-7 7/15/2013 124.11 121.68 36.66 34.23 87.45 - - 760/430 b,k - <0.50 <3.0 <1.0 <3.0 <3.0 <3.0 MW-7 10/30/2013 124.11 121.68 35.46 33.03 88.65 - - <250/<250b - <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 MW-7 1/23/2014 124.11 121.68 36.50 34.07 87.61 - - <250/<250 b - <0.50 <3.0 <1.0 <1.0 <3.0 <1.0 MW-7 4/15/2014 124.11 121.68 37.55 35.12 86.56 - - <240/<240b - <0.50 <3.0 <1.0 <1.0 <1.0 <1.0 - MW-8 8/23/2010 123.30 121.05 35.80 33.55 87.50 - - <250 <50 <0.50 <3.0 <1.0 <1.0 <1.0 MW-8 12/9/2010 123.30 121.05 35.53 33.28 87.77 - - <250 <50 <0.50 <1.0 <1.0 - <1.0 1,270 MW-8 6/27/2011 123.30 121.05 36.91 34.66 86.39 - - <240 <47 b <O.50 <0.50 <0.50 <1.0 MW-8 9/8/2011 12330 121.05 35.67 33.42 87.63 - - <240 <47b <0.50 <0.50 <0.50 <1.0 MW-8 11/30/2011 123.30 121.05 35.38 33.13 87.92 - - - <48.1 b <0.50 <0,50 <O50 <0.50 MW-8 3/22/2012 123.30 121.05 37.05 34.80 86.25 - - <240 - <0.50 <0.50 <0.50 <1.0 MW-8 6/27/2012 123.30 121.05 35.80 33.55 87.50 - - 550/360b - <0.50 <0.50 <0.50 <1.0 MW-8 f 9/18/2012 123.30 121.05 34.62 32.37 88.68 - - <250/<250 b - <0.50 <3.0 <3.0 <1.0 MW-8 g 9/18/2012 - - - - - - - 390/<240 b,e MW-8 1/11/2013 123.30 121.05 35.39 33.14 87.91 - - <250/<250 b - <O.50 <1.0 <1.0 - - <1.0 - CW60223(37)