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a,f i HEALTH <br /> Department of Toxic Substances <br /> Maureen F. Gorsen, Director <br /> Linda S.Adams 8800 Cal Center Drive Arnold Schwarzenegger <br /> Secretary for Sacramento, California 95826-3200 Governor <br /> Environmental Protection <br /> March 13, 2008 <br /> Mr. Marshall Cloud <br /> Defense Logistics Agency <br /> Defense Distribution Depot San Joaquin, Tracy Site <br /> Post Office Box 960001 <br /> Stockton, California 95296-0250 <br /> COMMENTS ON THE DRAFT DEFENSE ENTERPRISE SUPPORT SAN JOAQUIN <br /> (DESJC) — TRACY 2007 FEDERAL FACILITIES AGREEMENT ANNUAL PROGRESS <br /> REPORT, TRACY, CALIFORNIA <br /> Dear Mr. Cloud: <br /> The Department of Toxic Substances Control (DTSC) received the above-mentioned <br /> report on December 20, 2007. The report summarizes performance data for the <br /> groundwater extraction and treatment system, presents the results of the treated <br /> groundwater discharge sampling events taken from October 2006 through <br /> September 2007, and provides data from the soil vapor extraction (SVE) system <br /> operations. DTSC has reviewed the report and has the following comments: <br /> Comments <br /> 1. Page ES-2, Section ES.2.2.9, third sentence; DESJC was not defined on the <br /> Acronyms Page and should be added. In addition, DESJC should be defined <br /> properly in the report's text for consistency. <br /> 2. Page ES-5, Section ES.5.3.2, second sentence; The report should identify the <br /> definition of a "preferred" well. <br /> 3. Page ES-6, Section ES.5.4.1; DESJC should identify if any of the wells <br /> planned for decommissioning are required by the Record of Decision (ROD) <br /> to support any Institutional Controls (ICs). <br /> 4. Page 2-1, Section 2.2.2; This section is numbered incorrectly and should be <br /> revised to section 2.1.2. <br /> 5. Page 2-1, Section 2.1.2, fourth sentence; The report should note that <br /> Tricholorethene (TCE) and Tetrachloroethene (PCE) rebounds detected at <br /> LM032AU are probably a result of SVE Area 3 persistent source observed to <br /> ® Printed on Recycled Paper <br />