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- s <br /> 1600 Durham Ferry <br /> Page 2 <br /> The work plan indicated that once the wells were purged, samples would be collected for analysis. The detection <br /> limits and the methods used for analysis that the work plan included are erroneous. Water samples should <br /> undergo EPA Method 602 analysis and GCFID EPA Method 5030 and EPA 3550 with minimum detection limits <br /> of 0.5 ppb for BTEX and 50 ppb for TPH. <br /> Please submit verification that the stockpiled soil has been adequately treated and is no longer contaminated. <br /> A revised work plan must be submitted by February 28, 1995. Please be aware that copies of work plans, <br /> reports and correspondence should also be forwarded to the Central Valley Regional Water Quality Control <br /> Board. <br /> If you have any questions, please contact Mary Meays at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MM\1600DURH <br /> cc: Elizabeth Thayer, CVRWQCB <br /> cc: Donald Light, Del-Tech <br />