ARCHIVED REPORTS_2009_2010 ANNUAL MONITORING REPORT

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' Table 3 Free-Product Monitoring Data Union Pacific Railroad Company Former Maintenance Facility,Tracy,California 2009/2010 Annual Groundwater Monitoring Report Well Date Depth to Depth to Water Product ' Product Thickness Comments Identification Measured ( ) (feet btc) (inches) feet bte ) TW-02 04/18/05 ND 10.54 0.00 05/05/05 ND 10.52 0.00 ' 06/01/05 ND 9.26 0.00 06/22/05 ND 9.72 0.00 07/08/05 ND 9.67 0.00„ 07/21/05 ND 9.84 0.00 08/01/05 ND 9.40 0.00 08/11/05 ND 9.56 0.00 09/09/05 ND 10.04 0.00 09/26/05 ND 10.31 0.00 10/12/05 ND 10.40 0.00 ' 10/28/05 ND 10.53 0.00 11/07/05 ND 10.61 0.00 11/30/05 ND 10.69 0.00 12/16/05 ND 10.87 0.00 ' 12/29/05 ND 10.46 0.00 01/09/06 ND 10.17 0.00 01/31/06 ND 10.45 0.00 02/14/06 ND 10.67 0.00 ' 02/21/06 ND 10.65 0.00 03/08/06 ND 10.58 0.00 03/23/06 ND 10.41 0.00 04/17/06 --- --- 0.12 04/27/06 --- --- 0.36 ' 05/10/06 --- __- 0.00 05/26/06 0.00 06/13/06 --- --- 0.00 07/06/06 ND 9.21 0.00 ' 07/28/06 ND 9.79 0.00 08/08/06 ND 10.05 0.00 12/27/06 10.90 10.99 1.08 03/20/07 10.90 10.93 0.36 11/29/07 11.31 11.32 0.12 03/28/08 10.63 10.64 0.12 08/20/08 ND 11.05 0.00 Slight hydrocarbon color 11/21/08 11.41 11.46 0.60 ' 03/16/09 11.03 11.32 3.48 product,odor,bailer confirmation 11/19/09 11.95 12.80 10.20 03/15/10 10.20 11.13 11.16 TW-03 04/18/05 ND 11.32 0.00 ' 05/05/05 ND 11.26 0.00 06/01/05 ND 9.92 0.00 06/22/05 ND 10.46 0.00 07/08/05 ND 10.45 0.00 07/21/05 ND 10.59 0.00 ' 08/01/05 ND 10.03 0.00 08/11/05 ND 10.30 0.00 09/09/05 ND 10.79 0.00 09/26/05 ND 11.00 0.00 ' 10/12/05 ND 11.16 0.00 10/28/05 ND 11.04 0.00 11/07/05 ND 11.27 0.00 11/30/05 ND 11.45 0.00 ' 12/16/05 ND 11.40 0.00 12/29/05 ND 11.00 0.00 01/09/06 ND 10.72 0.00 01/31/06 ND 11.00 0.00 02/14/06 ND 11.21 0.00 02/21/06 ND 11.19 0.00 03/08/06 ND 11.09 0.00 tUP Tracy Annual Tables 2010_CC'd_AAV.xlsx ARCAOIS Page 7 of 8