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Department of Toxic`Substances Control <br /> Linda S.Adams Maureen F. Gorsen, Director Arnold Schwarzeneggei <br /> Secretary for 9211 Oakdale Ave Governor <br /> Environmental Chatsworth, California 91311 <br /> Protection <br /> MEMORANDUM <br /> TO: Mr. Peter MacNicholl, Project Manager <br /> Hazardous Substances Engineer <br /> Office of Military Facilities <br /> Sacramento Office <br /> FROM: Alice Campbell, PG, CEG, CHg <br /> Senior Engineering Geologist <br /> Chatsworth Geological Services Unit <br /> CONCUR: Craig Christmann, P.G. <br /> -k— <br /> Senior Engineering Geologist <br /> Chatsworth Geological Services Unit <br /> DATE: February 21, 2009 <br /> SUBJECT: Review of URS, Inc, Defense Distribution Depot San Joaquin CA Tracy <br /> site, Northwestern Corner Dieldrin Plume Feasibility Study, dated <br /> November, 2008, Tracy, California 95330. <br /> PCA: 14741 Site Code: 100048-47 Log No. 830249 01FICFpF <br /> l�/rIES pROIT,�RV <br /> All, <br /> Introduction: <br /> At your request, the Chatsworth Geological Services Unit (GSU) prepared the--&&, gDEp <br /> memorandum to provide comments on the above-referenced report submitted <br /> facility. The Feasibility Study (FS) was competed to evaluate remedial options for <br /> dieldrin contamination accidently released during VOC cleanup. <br /> Background <br /> The site is a logistics depot located near the center of the San Joaquin valley in central <br /> California, and covers about 908 acres. The site has about 65 feet of relief, sloping <br /> from 110 feet msl in the southwest to about 45 feet msl to the northeast. The base <br /> occupies former agricultural land west of the San Joaquin River. The northeast corner <br /> 0 Printed on Recycled Paper <br />