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Mr. Tracy Sizemore - 2 - 2 March 2004 <br /> monitoring activities conducted in December 2003, summarizes the trends and investigative <br /> activities in 2003, and proposes revisions to Monitoring and Reporting Program (MRP)No. <br /> 5-01-814 and the destruction of monitoring wells MW-12 and MW-13. The Investigation Report <br /> discusses the results of one cone penetrometer test(CPT) grab groundwater sample, one CPT <br /> location for lithology, and the installation of monitoring wells MW-20, MW-21B, and MW-22C. <br /> CP proposes not to install any monitoring well in the D water bearing zone based on the low <br /> concentrations in the C water bearing zone and the operation of the GWETS. <br /> Regional Board staff concurs that additional monitoring of the C water bearing zone is needed to <br /> determine if monitoring wells are needed in the D water bearing zone. We have reviewed the <br /> requested changes to the MRP. Many of the recommendations have been incorporated into the <br /> attached draft MRP. However, fuel oxygenates methanol and ethanol will not be removed from <br /> the MRP because methanol has previously been detected at the site. If a fuel oxygenate is not <br /> detected in the first or third quarter monitoring events, it can be removed from the list of required <br /> analysis for that well. Additionally, the Annual Report states methanol was analyzed by EPA <br /> Method 8015M, which does not follow MRP No. 5-01-814. CP must follow the MRP <br /> requirements before analytes and/or wells can be removed from the required sampling list. We <br /> concur with the destruction of monitoring wells MW-12 and MW-13. <br /> By 26 March 2004, please provide comments on the attached draft MRP. If you have any <br /> questions you may contact me at(916) 464-4719 or by email at lewisd@rb5s.swrcb.ca.gov. <br /> DEVRA LEWIS <br /> Environmental Scientist <br /> Attachment <br /> cc: Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Richard Stiffler, City of Stockton—Department of Municipal Utilities, Stockton <br /> Ms. Amy Breckenridge, URS Corporation, Oakland <br /> Ms. Lori Kiger, Earth Tech, Inc., Sacramento <br />