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TABLE 1 Page 3 of 4 GROUNDWATER DATA FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES CORDES RANCH TRACY,CALIFORNIA Ground Depth to Depth to Depth ni&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 ft bgs ft MSL feet feet ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L Yu&1L MW-10 6/27/11 124.16 121.72 37.65 35.21 86.51 - - <240 <47b <0.50 <0.50 <0.50 - <1.0 - MW-10 9/8/11 124.16 121.72 36.48 34.04 87.68 - - <240 <49 b <0.50 <0.50 <0.50 - - <1.0 MW-10 11/30/11 124.16 121.72 36.13 33.69 88.03 - - NA <48.5 b <0.50 <0.50 <0.50 - <0.50 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 6/27/11 123.70 121.33 37.25 34.88 86.45 - - <240 52 b <0.50 <0.50 <0.50 - - <1.0 - MW-11 9/8/11 123.70 121.33 36.04 33.67 87.66 - - <240 <48 b <0.50 <0.50 <0.50 - - <1.0 - MW-11 11/30/11 123.70 121.33 35.70 33.33 88.00 - - NA <47.6 b <0.50 <0.50 <0.50 - - <0.50 - MW-12 8/25/11 124.82 121.89 37.36 34.43 87.46 - - - - - - - - - - - MW-12 9/8/11 124.82 121.89 37.76 34.83 87.06 - - <480 <95 b <0.50 <0.50 <0.50 - - <1.0 - MW-12 11/30/11 124.82 121.89 38.84 35.91 85.98 - - NA <47.6 b <0.50 <0.50 <0.50 - - <0.50 - MW-13B 8/25/11 122.93 120.64 38.92 36.63 84.01 - - - - - - - - - - - MW-13B 9/8/11 12293 120.64 37.98 35.69 84.95 - - 1,700 94 b <0.50 <0.50 <0.50 - - <1.0 - MW-13B 11/30/11 122.93 120.64 37.44 35.15 85.49 - - NA 67.4 b <0.50 <0.50 <0.50 - - <0.50 - MW-13C 8/25/11 123.71 120.64 58.14 55.07 65.57 - - - - - - - - - - MW-13C 9/8/11 123.71 120.64 58.02 54.95 65.69 - - <240 <48 b <0.50 <0.50 <0.50 - - <1.0 - MW-13C 11/30/11 123.71 120.64 57.31 54.24 66.40 - - NA 955 b <0.50 <0.50 <0.50 - - <0.50 - MW-14B 8/25/11 120.66 117.42 36.82 33.58 83.84 - - - - - - - - - - - MW-14B 9/8/11 120.66 117.42 34.42 31.18 86.24 - - <240 <47b <0.50 <0.50 <0.50 - - <1.0 MW-14B 11/30/11 120.66 117.42 33.33 30.09 87.33 - - NA 211 b <0.50 <0.50 <0.50 - - <0.50 MW-14C 8/25/11 120.64 117.43 40.16 36.95 80.48 - - - - - - - - - - - MW-14C 9/8/11 120.64 117.43 56.52 53.31 64.12 - - <480 <95 b <0.50 <0.50 <0.50 - - <1.0 - MW-14C 11/30/11 120.64 117.43 55.81 52.60 64.83 - - NA <47.2 b <0.50 <0.50 <0.50 - - <0.50 - MW-15 8/25/11 127.06 124.05 40.18 37.17 86.88 - - - - - - - - - - MW-15 9/8/11 127.06 124.05 39.98 36.97 87.10 39.95 0.03 - - - - - - - MW-15 11/30/11 127.06 124.05 40.04 37.03 87.07 39.98 0.06 - - - - - - CFAO6=(16)