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f <br /> volatile organic compounds?] If this issue of PCE, TCE and other contaminants residing in <br /> the finer-grained sediments above the Upper Horizon is not to be addressed during the <br /> remedial design (RD) phase of Operable Unit (OU) No. 1 by DDRW-Tracy and contractors, <br /> this issue as well as the issues of other contaminants such as pesticides and metals in the <br /> finer-grained materials must be addressed during the comprehensive remedial <br /> investigation/feasibility study (RI/FS) for DDRW-Tracy. <br /> 2. Also, page 1 of Section 1.0.0.1 states that the Interim Remedial Measure (IRM) system was <br /> placed in "full-scale operation in November of 1992." This implies that the units were <br /> operating as intended; this is an incorrect implication. This issue should be clarified in the <br /> text. <br /> Thank you for the opportunity to comment on this report. If you have any questions, please <br /> contact me at (415) 744-2392. <br /> Sincerely, <br /> r 7 <br /> Michael Work <br /> Federal Facilities Cleanup Office (H-9) <br /> Hazardous Waste Management Division <br /> cc: (See Distribution List) <br /> 2 <br />