ARCHIVED REPORTS_2010_2011 ANNUAL MONITORING REPORT

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' Table T Groundwater Elevations Union Pacific Railroad Company Former Maintenance Facility , Tracy, California 2011/2011 Annual Groundwater Monitoring Report ' Well Date Reference Elevation Depth to Water Water Elevation Identification (feet above MSL) (feet btc) (feet above MSL) ' MW-15B 11/07/05 51.45 15.59 35.86 03/07/06 51.45 12.57 38.88 12/27/06 51.45 12.86 38.59 03/20/07 51.45 12.76 38.69 11/29/07 51.45 13.07 38.38 03/18/08 51.45 12.46 38.99 11/20/08 51.45 13.20 38.25 03/16/09 51.45 12.96 38.49 1 11/19/09 51.45 13.35 38.90 03/15/10 51.45 12.31 39.14 11/22/10 54.36 12.90 41.46 03/16/11 54.36 12.70 41.66 MW-15C 11/07/05 50.90 12.30 38.60 03/07/06 50.90 12.28 38.62 12/27/06 50.90 12.46 38.44 ' 0120107 50.90 12.47 38.43 11/29/07 50.90 12.76 38.14 03/18/08 50.90 12.25 38.65 11/20/08 50.90 12.83 38.07 03/16/09 50.90 12.60 38.30 11/19/09 50.90 13.02 37.88 03/15/10 50.90 12.20 38.70 ' 11/22/10 53.77 12.65 41.12 03/16/11 53.77 12.23 41.54 MW-16A 11/07/05 48.23 12.60 35.63 03!07106 48.23 10.19 38.04 12/27/06 48.23 10.37 37.86 03/20/07 48.23 10.12 38.11 11/29/07 48.23 10.48 37.75 03/18/08 48.23 10.05 38.18 ' 11/20/08 48,23 16.80 31.43 03/16/09 48.23 10.51 37.72 11/19/09 48.23 10.90 37,33 03/15/10 48.23 10.10 38.13 11/22/10 51.10 10.35 40.75 03/16/11 51.10 10.20 40.90 MW-16B 11/07/05 47.17 9.48 37.69 ' 03/07/06 47.17 9.30 37.87 12/27/06 47.17 9.61 37.56 03/20/07 47.17 9.46 37.71 11/29/07 47.17 NM NA ' 03/18/08 47.17 9.26 37.91 11/20/08 47.17 9.96 37.21 03/16/09 47.17 9.72 37.45 11/19/09 47.17 10.29 36.88 03/15/10 47.17 9.21 37.96 11/22/10 50.05 9.70 40.35 03/16/11 50.05 9.40 40.65 ' ARCADES UP"racy Annual Tables 1-5 2011.xisx Page 10 of 17