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r <br /> STATE OF CALIFORNIA—HEALTH AND WELFARE AGENCY GEORGE DEUKMEJIAN, Gown r <br /> DEPARTMENT OF HEALTH SERVICES ^- <br /> TOXIC SUBSTANCES CONTROL DIVISION <br /> REGION May 12, 1989 <br /> 4250 POWER INN ROAD <br /> SACRAMENTO,CA 95826 <br /> (916)7393145 <br /> Fred Burkett, Ltc <br /> Director of Installation Services <br /> Defense Depot Tracy 2 <br /> 5600 South Chrisman Rd. <br /> Tracy, CA 95367-5000 <br /> Dear Colonel Burkett: (�/`c•�/` <br /> COMMENTS TO THE PHASE 1 DRAFT REMEDIAL INVESTIGATION (RI) <br /> REPORT AND THE DATA ANALYSIS SUPPORTING TASK 36 WELL LOCATIONS <br /> REPORT FOR DEFENSE DEPOT TRACY (DDTC) <br /> Enclosed are the Department of Health Services (DHS) comments <br /> regarding the two subject reports. Our concerns have been <br /> informally conveyed to your installation via discussions <br /> during the 19 of January technical meeting and subsequent <br /> phone conversations. Our comments are formalized with this <br /> enclosure. <br /> Our primary comments are focused on the discussions presented <br /> in the reports. These dipcussions were found to be deficient <br /> in both detail and content. Three topics where discussions <br /> need elaboration are: <br /> o the correlation of different sampling media (soil, soil <br /> gas, and groundwater) <br /> o the conclusions regarding contaminants in the soil <br /> (unsaturated zone) <br /> o the recommendations, interpretations, and reduction of <br /> data with respect to hydrogeologic conditions <br /> DHS can not support the conclusions presented unless the <br /> discussions in the Phase 1 Draft Report are expanded upon. <br />