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TABLE 1 Page 2 of 4 GROUNDWATER DATA FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDES RANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth rn&p- o- Xylenes Well ID Sample Date TOC Surface Water Water GW Elev to SPH Thickness TPHc TPHd Benzene Toluene Ethylbenzene Xylenes Xylene (total) TDS ft MSL ft MSL ft TOC ftbgs ft MSL feet feet ug/I, ug/L ug/L ug/L ug/L ug/L rigIL ug& mg1L MW-5B 9/8/11 123.44 120.92 35.95 33.43 87.49 - - <470 <94 b <0.50 <0.50 <0.50 - - <1.0 MW-513 11/30/11 123.44 120.92 35.60 33.08 87.84 - - NA 54 d <0.50 <0.50 <0.50 - - <0.50 - MW-5C 9/16/2010 123.44 120.86 60.14 57.56 63.30 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 - 1,850 MW-5C 12/10/2010 123.44 120.86 59.13 56.55 64.31 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 2,060 MW-5C 6/27/11 123.44 120.86 57.41 54.83 66.03 - - <240 70 b <0.50 <0.50 <0.50 - - <1.0 - MW-5C 9/8/11 123.44 120.86 58.35 55.77 65.09 - - <470 <94 b <0.50 <0.50 <0.50 - - <1.0 - MW-5C 11/30/11 123.44 120.86 57.70 55.12 65.74 - - NA 161 d <0.50 <0.50 <0.50 - - <0.50 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 6/27/11 123.09 120.50 36.70 34.11 86.39 - - <240 <47b <0.50 <0.50 <0.50 - - <1.0 - MW-6 9/8/11 123.09 120.50 35.47 32.88 87.62 - - <470 <94 b <0.50 <0.50 <0.50 - - <1.0 - MW-6 11/30/11 123.09 120.50 35.08 32.49 88.01 - - NA <47.2 b <0.50 <0.50 <0.50 - - <0.50 - MW-7 8/23/2010 124.11 121.68 36.6 34.17 87.51 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 - - 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 6/27/11 124.11 121.68 37.58 35.15 86.53 - - <240 <47b <0.50 <0.50 <0.50 - - <1.0 - <470 <94 b <0.50 <0.50 <0.50 - - <1.0 MW-7 9/8/11 124.11 121.68 36.42 33.99 87.69 - - - MW-7 11/30/11 124.11 121.68 36.08 33.65 88.03 - - NA <48.5 b <0.50 <0.50 <0.50 - - <0.50 - MW-8 8/23/2010 123.30 121.05 35.80 33.55 87.50 - - <250 <50 <0.50 <1.0 <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 6/27/11 123.30 121.05 36.91 34.66 86.39 - - <240 <47b <0.50 <0.50 <0.50 - <1.0 - MW-8 9/8/11 123.30 121.05 35.67 33.42 87.63 - - <240 <47b <0.50 <0.50 <0.50 - <1.0 MW-8 11/30/11 123.30 121.05 35.38 33.13 87.92 - - NA <48.1 b <0.50 <0.50 <0.50 - - <0.50 MW-9 8/23/2010 123.91 121.31 36.30 33.70 87.61 - - <250 <50 <0.50 <1.0 <1.0 <1.0 <1.0 - - MW-9 12/9/2010 123.91 121.31 36.00 33.40 87.91 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 1,340 MW-9 6/27/11 123.91 121.31 37.40 34.80 86.51 - - <240 <47 b <0.50 <0.50 <0.50 - <1.0 - MW-9 9/8/11 123.91 121.31 36.25 33.65 87.66 - - <240 <50 b <0.50 <0.50 <0.50 - <1.0 MW-9 11/30/11 123.91 121.31 35.87 33.27 88.04 - - NA <47.6 b <0.50 <0.50 <0.50 - <0.50 MW-10 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-10 12/9/2010 124.16 121.72 36.30 33.86 87.86 - - <250 <50 <0.50 <1.0 <1.0 - - <1.0 1,080 CRAW2B(16)