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ARCADIS 201012011 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 61h 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 5401R-941013. February. <br /> 1999. USEPA Contract Laboratory Program National Functional Guidelines <br /> ' for Organic Data Review, USEPA 5401R-991008. October. <br /> erei vecy,ca.meimreuiity_n��Rpt_42s-zotieo� Page:717 <br />