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1 <br /> Table 3 <br /> Free-Product Monitoring Data t <br /> Union Pacific Railroad Company <br /> Former Maintenance Facility,Tracy, California <br /> 2009/2010 Annual Groundwater Monitoring Report ' <br /> Depth to Product <br /> Well Date Product Depth Water Thickness Comments <br /> Identification Measured (feett btc) <br /> (feet btc) (Inches) ' <br /> TW-03 03/23/06 ND 10.93 0.00 <br /> 04/17/06 --- --- 0.00 <br /> 04/27/06 --- --- 0.00 <br /> 05/10/06 --- --- 0.00 ' <br /> 05/26/06 --- --- 0.00 <br /> 06/13/06 --- --- 0.00 <br /> 07/06/06 ND 9.73 0.00 <br /> 07/28/06 ND 10.45 0.00 t <br /> 08/08/06 ND 10.58 0.00 <br /> 12/27/06 ND 11.58 0.00 <br /> 03/20/07 ND 11.56 0.00 <br /> 11/29/07 ND 11.95 0.00 ' <br /> 03/28/08 ND 11.25 0.00 <br /> 08/20/08 ND 11.72 0.00 <br /> 11/21/08 ND 12.07 0.00 <br /> 03/16/09 ND 11.79 0.00 <br /> 11/19/09 ND 12.20 0.00 ' <br /> 03/15/10 ND 11.00 0.00 <br /> TW-04 04/18/05 11.10 11.19 1.08 Replace sock <br /> 05/05/05 ND 11.05 0.00 Remove sock <br /> 06/01/05 ND 9.90 0.00 Sheen ' <br /> 06/22/05 10.30 10.40 1.20 Install sock <br /> 07/08/05 ND 10.26 0.00 Remove sock <br /> 07/21/05 ND 10.43 0.00 <br /> 08/01/05 ND 10.00 0.00 , <br /> 08/11/05 ND 10.18 0.00 <br /> 09/09/05 ND 10.60 0.00 <br /> 09/26/05 ND 10.87 0.00 <br /> 10/12/05 ND 10.96 0.00 Sheen ' <br /> 10/28/05 11.09 11.10 0.12 <br /> 11/07/05 11.19 11.22 0.36 Not sampled,product in well <br /> 11/30/05 ND 11.26 0.00 Soil in well caused false product reading <br /> 12/16/05 ND 11.44 0.00 <br /> 12/29/05 ND 11.02 0.00 ' <br /> 01/09/06 10.74 10.77 0.36 Install socks <br /> 01/31/06 ND 11.02 0.00 Remove socks <br /> 02/14/06 ND 11.21 0.00 <br /> 02/21/06 ND 11.22 0.00 ' <br /> 03/08/06 ND 11.11 0.00 <br /> 03/23/06 ND 10.96 0.00 <br /> 04/17/06 --- --- 0.12 <br /> 04/27/06 --- --- 0.12 ' <br /> 05/10/06 --- --- 0.12 <br /> 05/26/06 --- --- 0.00 <br /> 06/13/06 --- --- 0.12 <br /> 07/06/05 9.80 9.85 0.60 Install socks ' <br /> 07/28/06 ND 10.39 0.00 <br /> 08/08/06 ND 10.63 0.00 <br /> 12/27/06 ND 11.47 0.00 <br /> 03/20/07 ND 11.43 0.00 <br /> 11/29/07 11.97 12.01 0.48 ' <br /> 03/28/08 11.12 11.46 4.08 <br /> 08/20/08 11.60 12.90 15.60 <br /> 11/21/08 11.83 13.00 14.04 <br /> 03/16/09 11.47 12.31 10.08 Bailer confirmation-removed 5 gals.of product ' <br /> 11/19/09 12.88 13.93 12.60 <br /> 03/15/10 10.80 11.44 7.68 <br /> Key: ' <br /> btc=below top of casing <br /> gal=gallons <br /> ND=not detected <br /> ---=groundwater and product level measurements not provided by ERM for inclusion in Table 3 <br /> UP Tracy Annual Tables 2010 OC'0 AAV.zlsz ARCAnIS Page 8 of 8 ' <br />