ARCHIVED REPORTS_GROUNDWATER MONITORING REPORT - THIRD QUARTER 2013

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TABLE 1 Page 1 of 9 GROUNDWATER DATA ' FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDESRANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth m&p- o- xylenesWeIIID SampleDate TOC Surface Water Water GW Elea to SPH ThicknessTPHc TPHd Benzene Toluene Ethylbenzeae Xylmws Xylene (total) TDS ("SL) (ft MSL) (ft TOC) (ft bgs) (ft MSL) (feet) (feet) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (per,) WIL) (mg/L) MW-1 8/23/2010 127.28 124.56 40.35 37.63 86.93 - - <250 <50 <0.50 <1.0 <.0 <3.0 <1.0 MW-1 12/8/2010 127.28 124.56 40.45 37.73 86.83 - - <250 X50 <0.50 <LO <.0 Q.0 1,530 MW-1 6/27/2011 127.28 124.56 40.96 38.24 86.32 - - <240 <48 b <0.50 <0.50 <0.50 MW-1 9/8/2011 127.28 124.56 40.02 37.30 87.26 - <480 - - <.O b <0.50 <0.50 <0.50 <Lp _ MW-1 11/30/2011 127.28 124.56 39.18 36.46 . 88.10 - - - 077.47.6 b <0.50 <0.50 <p.sp _ _ <p.sp MW-1 3/22/2012 127.28 124.56 41.37 38.65 85.91 - - <240 <0.50 <O.50 <0.50 <0 _ MW-1 6/28/2012 127.28 124.56 40.05 37.33 87.23 - - <240/<240b - <0.50 <O.50 <0.50 <1.0 MW-1f 9/18/2012 127-28 124.56 39.16 36.44 88.12 - - <250/<250b - <0.50 <.0 <.0 - MW-1 g 9/18/2012 _ _ _ _ _ _ _ 450/<240b,e - _ <3.0 _ _ MW-1 1/11/2013 127.28 124.56 39.80 37.08 87.48 - - <250/<250b - <0.50 <3.0 <1.0 <1.0 MW-1 4/25/2013 127.28 124.56 41.05 38.33 86.23 - - <250/<250b - <0.50 <.0 <1.0 - <3.0 MW-1 7/15/2013 127.28 124.56 39.95 37.23 87.33 - - <250/<250b - <0.50 <.0 <.0 <1.0 <.0 <.O - MW-2 8/23/2010 123.60 121.29 36.21 33.90 87.39 - - 23,000 13,000 89 <1.0 1A <.O <.p MW-2 12/8/2010 123.60 121.29 36.03 33.72 87.57 - - 11,000 6,800 190 <1.0 26 <.0 1550 MW-2 6/27/2011 123.60 121.29 37.10 34.79 86.52 37.08 0.02 _ MW-2 9/8/2011 123.60 121.29 35.98 33.67 87.62 - - 8,400 3,500 b 290 <20 3.0 <4,p MW-2 11/30/2011 123.60 121.29 35.70 33.39 87.90 - - - 13,700 b 377 <0.50 5.15 - - <0.50 MW-2 3/22/2012 123.60 121.29 37.38 35.07 86.22 - - 13,000 - 150 <20 24 <4,0 MW-2 6/28/2012 123.60 121.29 36.11 33.80 87.49 - - 13,000/9,800 b - 140 <.0 20 - - <20 MW-2f 9/18/2012 123.60 121.29 35.00 3269 88.60 - - 4,000/3,000 b - 240 <2.0 <20 - - <2p MW-2g 9/18/2012 - - - - - - - 18,000/8,500 be - _ _ MW-2 1/11/2013 123.60 121.29 35.74 33.43 87.86 - - 4,100/2,700 b - 270 <2p 3.4 - _ <20 MW-2 3/5/2013 123.60 121.29 36.42 3411 87.18 - - _ - MW-2 4/25/2013 123.60 121.29 36.85 34.54 86.75 - - 5,800/4,400 b - 360 <20 2.5 <20 MW-2 7/15/2013 123.60 121.29 36.31 34.00 87.29 - - 9,300/5,500 b,k - 320 <2p 22 <2.0 <20 <20 MW-3 8/23/2010 123.70 121.07 36.38 33.75 87.32 - - <250 <50 <0.50 <1.0 <.0 <1.0 <,O MW-3 12/8/2010 123.70 121.07 36.10 33.47 87.60 - - <250 <50 <0.50 <1.0 <.0 - - <.0 1,290 MW-3 6/27/2011 173.70 121.07 37.34 34.71 86.36 - - <240 540 b <0.50 <0.50 <0.50 <_O _ MW-3 9/8/2011 123.70 121.07 36.36 33.73 87.34 - - <490 <95b <0.50 <0.50 <0.50 - - <1.0 MW-3 11/30/2011 123.70 121.07 35.85 33.22 87.85 - - - <47.6 b <0.50 <0.50 <0.50 - - MW-3 3/22/2012 123.70 121.07 37.47 34-84 86.23 - - <p,5p <240 - <p.50 <0.50 <0.50 <0 MW-3 6/27/2012 123.70 121.07 36.22 33.59 87.48 - _ <240/<240b - <0.50 <0.50 <0.50 - - <1.0 - a<nrcvov py