ARCHIVED REPORTS_2010_2011 ANNUAL MONITORING REPORT

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Table 4 Historical Halogenated Volatile Organic Compound Groundwater Analytical Results Union Pacific Railroad Company Former Maintenance Facility,Tracy,California 2010/2011 Annual Groundwater Monitoring Report Cleaup Levels(WDR-98-213) 200 5 16.0 6.0 10 0.69 2.3 0.13 NA Cleanup Levels(WDR-97-707)a 200 5.0 0.06 5.0 6.0 10 0.7 5.0 0.015 NA cis-1,2- trans-1,2- Vinyl Total Notes Well ID Date Sampled 1,1,1-TCA 1,1-DCA 1,1-DCE Chloroethane DCE DCE PCE TCE Chloride HVOCs 03/19/08 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/17/09 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/16/10 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND MW-13A 11/20/01 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<0.5 ND 03/07/02 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<0.5 ND 03/26/03 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND 03/23/04 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/01/05 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/14/06 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/21/07 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/19/08 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/17/09 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/16/10 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND MW-13B 11/20/01 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<0.5 ND 03/08/02 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<0.5 ND 03/26/03 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND<1 ND 03/24/04 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/01/05 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/14/06 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/21/07 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/19/08 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/17/09 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/16/10 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND MW-14A 11/18/02 ND<0.5 0.88 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 0.88 03/25/03 ND<1 1.7 ND<1 ND<1 0.57 j ND<1 ND<1 ND<1 0.32 j 2.59 11/12/03 ND<1.0 1.6 ND<1.0 ND<2.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 1.6 03/24/04 ND<1.0 9.2 ND<1.0 ND<1.0 0.23 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 9.43 11/02/04 ND<1.0 0.54 j ND<1.0 ND<1.0 0.17 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 0.71 Dup 11/02/04 ND<1.0 0.6 j ND<1.0 ND<1.0 0.14 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 0.74 03/01/05 ND<1.0 0.55 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 0.55 Dup 03/01/05 ND<1.0 0.52 j ND<1.0 ND<1.0 0.14 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 0.66 11/08/05 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND 03/14/06 ND<1.0 0.34 j ND<1.0 ND<1.0 0.21 j ND<1.0 ND<1.0 ND<1.0 ND<1.0 0.71 03/21/07 ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/19/08 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND 03/17/09 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND UP Tracy Annual Tables 1-5 2011.xlsx ARCADIS Page 6 of 11