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ARCADIS Ms. Amy Terrell <br /> January 29, 2014 <br /> Attachments: <br /> Table 1 Manual Bailing Program LNAPL Recovery Summary <br /> Table 2 Natural Source Zone Depletion Rates from CO2 Traps <br /> Figure 1 Site Location Map <br /> Figure 2 Site Plan and NSZD Sample Locations <br /> Appendix A Laboratory Analytical Reports <br /> References <br /> Amos, R.T., K. U. Mayer, B.A. Bekins, G.N. Delin, and R.L. Williams. 2005. Use of <br /> dissolved and vapor-phase gases to investigate methanogenic degradation <br /> of petroleum hydrocarbon contamination in the subsurface. Water Resources <br /> Research Vol 41, W02001. <br /> ARCADIS U.S., Inc. (ARCADIS). 2010. Phase II Field Investigation and LNAPL <br /> Mobility Evaluation Report, Union Pacific Railroad Company, Tracy, CA— <br /> Maintenance Facility, Tracy, California. November 29. <br /> 2012. Response to Comments—"Phase II Field Investigation and LNAPL <br /> Mobility Evaluation Report, UPRR, Former Tracy Maintenance Facility", <br /> Tracy, CA—Maintenance Facility. November 14. <br /> Conrad, M.E., A.S. Templeton, P.F. Daley, and L. Alvarez-Cohen, 1999. Isotopic <br /> Evidence for Biological Controls on Migration of Petroleum Hydrocarbons. <br /> Org. Geochem., 30:4061-4068. <br /> Environmental Resources Management (ERM). 2006. Additional Product Removal <br /> Proposal, Union Pacific Railroad Former Maintenance Facility, Tracy, <br /> California. <br /> Sihota, N.J., O. Singurindy, and K.U. Mayer, 2011. CO2-Efflux Measurements for <br /> Evaluating Source Zone Natural Attenuation Rates in a Petroleum <br /> Hydrocarbon Contaminated Aquifer, Environ. Sci. Technol., 45:482-488. <br /> Page: <br /> G:tProjects\UPRR_Rose,ille\RC000709_Tracy Mnt Fadlityt3_DELIVERABLESt2014.01 NSZD Rpffracy ca-Maint Facility_NSZD Rpt(01-29-14).doc 9/9 <br />