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GEOSYNTEC CONSULTANTS <br /> Ms. Amy Terrell <br /> 8 June 2001 <br /> Page 6 <br /> • methane, <br /> • propene. <br /> Results of the analyses will be used to evaluate the biologically mediated <br /> breakdown of the HRC compound and the site-related chemicals in the groundwater. <br /> The results will also be used to measure the reducing state of the groundwater to <br /> evaluate if groundwater geochemistry is interfering with the reductive dechlorination <br /> process. <br /> Keystone Laboratories, Inc. of Newton, Iowa (Keystone) will perform the <br /> groundwater analyses. Keystone has experience with the numerous groundwater <br /> analyses for HRC remediation projects and is familiar with the methods and detection <br /> limits needed to properly evaluate the long-term performance of the treatment <br /> technology. GeoSyntec will review all data received from the laboratory for <br /> conformance to quality assurance and quality control (QA/QC) protocols. <br /> REPORTING <br /> The fieldwork described in this addendum will be documented to the RWQCB in <br /> the next regular quarterly groundwater monitoring report. The report will contain a <br /> summary of field activities and results of the baseline groundwater testing. Data will be <br /> presented in tabular and graphical formats. <br /> Evaluations of the performance of the field-scale pilot test will be presented along <br /> with the quarterly monitoring reports as required by the site Monitoring and Reportirrg <br /> Program. <br /> SCHEDULE <br /> Fieldwork is scheduled to begin 19 June 2001. Allowing for sufficient time for <br /> sample analyses and data evaluation, we believe that a report can be submitted to the <br /> RWQCB as part of the third quarter 2001 groundwater monitoring report. <br /> \\WCREEK-01\DATA\PRJI\WFS\SHELL\VER\HRC plans\RWQCB Plan.doc <br /> f, RECYCLED AND RECYCLABLE Affik <br />