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Department of Toxic Substances Control 11�`- <br /> ::... .. <br /> Maureen F. Gorsen, Director <br /> Alan C.Lloyd, p. <br /> 8800 Cal Center Drive Arnold Schwarzenegger <br /> arGovernor <br /> Agency Secretary Sacramento, California 95826-3200 <br /> CaVEPA [RE E��y/I���� ^ ��(� <br /> D <br /> W MARK 1 7 220066 <br /> March 10, 2006 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Mr. Marshall Cloud <br /> Defense Logistics Agency <br /> Defense Distribution Depot San Joaquin, Sharpe Site <br /> Post Office Box 960001 <br /> Stockton, California 95296-0250 <br /> COMMENTS ON THE DRAFT FEDERAL FACILITIES AGREEMENT ANNUAL <br /> PROGRESS REPORT FROM OCTOBER 2004 THROUGH SEPTEMBER 2005, FOR <br /> DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN COUNTY (DDJC), SHARPE SITE, <br /> LATHROP, CALIFORNIA <br /> Dear Mr. Cloud: <br /> The Department of Toxic Substances Control (DTSC) received the above-mentioned <br /> report on November 30, 2005. The report summarizes ground water analytical data <br /> from all wells sampled and water level measurements recorded from October 2004 <br /> through September 2005. DTSC has reviewed the report and has the following <br /> comments: <br /> Specific Comments: <br /> 1. Page ES-2, section ES.2.6; Please discuss how the recent results from <br /> monitoring well (MW) MW526 cluster support this determination with respect to <br /> the observed vertical gradients in the North Balloon. <br /> 2. Page ES-2, section ES.2.5; Please expand the discussion for the observed <br /> depressions along the western installation boundary, particularly for the North <br /> Balloon section, and whether it adequately accounts for the recent detections of <br /> Tricholorethene (TCE) in MW526 cluster. <br /> 3. Page ES-3, section ES.4.1.3; In the report, please discuss the recent TCE <br /> detections in the newly installed MW526 cluster located west of the North <br /> Balloon. <br />