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ARCADIS 2010/2011 Annual <br /> Monitoring Report <br /> Union Pacific Railroad <br /> Company <br /> Tracy, CA- Maintenance <br /> non-detect since the March 2008 monitoring event. These wells will continue to be Facility <br /> monitored to evaluate water quality at these locations. . <br /> Based on these observations, ARCADIS will: <br /> • monitor and sample the groundwater on a semi-annual basis to continue <br /> evaluating groundwater quality at the Site <br /> • prepare and submit a groundwater monitoring well evaluation regarding keeping, <br /> destroying and/or repairing wells as appropriate <br /> • evaluate the draft MRO prepared by the RWQCB (RWQCB 2009)and submit a <br /> response to the RWQCB <br /> 8.0 References <br /> California Regional Water Quality Control Board, Central Valley Region (RWQCB). <br /> 2009. Letter to UPRR, Draft Monitoring and Reporting Order, Union Pacific <br /> Railroad Company, Former Maintenance Facility, 720 East 6th Street, Tracy, <br /> San Joaquin County. February 11. <br /> United States Environmental Protection Agency(USEPA). 1994. USEPA Contract <br /> Laboratory Program National Functional Guidelines for Inorganic Data <br /> Review, USEPA 540/R-94/013. February. <br /> 1999. USEPA Contract Laboratory Program National Functional Guidelines <br /> for Organic Data Review, USEPA 540/R-99/008. October. <br /> final_tracy,ca-maint facility_AnnRpt_4-26-2011.dc,c Page:7/7 <br />