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I <br /> 1 <br /> kn KLEINEELDER <br /> ' An employee owned company � C r� E <br /> �� D <br /> j juL1�1 <br /> IE <br /> November 25,2002 <br /> Job No: 12280 D E C 0 2 Z002 <br /> ENVIRONMENT HEALTH <br /> Ms. Kelly Lynch PERMIT/,SERVICES <br /> Del Monte Food-Research Center <br /> 205 N. Wiget Lane <br /> P.O. Box 9004 <br /> Walnut Creek, CA 94598 <br /> Subject: Pilot Test Letter Report-Del Monte Disco Site <br /> ( 110 Filbert Street <br /> Stockton, California <br /> Dear Ms. Lynch: <br /> Kleinfelder has completed pilot testing of air sparging and soil vapor extraction technology at the <br /> Del Monte Disco Site. The pilot test utilized deep sparging wells with micro diffusers as <br /> discussed in our meeting with Mike Infurna and Marty Hartzell on April 17, 2002 and <br /> subsequently outlined in a Pilot Test Workplan dated May 17, 2002. As recommended by Mike <br /> Infurtia in his comments on the Pilot Test Workplan, we did not test integration of ozone <br /> technology as part of this pilot test. <br /> The pilot test proved a success. Bubble flux testing in MW-1 indicated a sparge well radius of <br /> j influence of approximately 64 feet in the subsurface. Furthermore, dissolved oxygen <br /> concentrations at this distance increased by over 30% after four hours of air sparging. <br /> Based on these and other finding from the pilot test, Kleinfelder is prepared to proceed with <br /> evaluating the technology in a subsequent Corrective Action Plan. The letter report attached <br /> outlines the details of the pilot testing procedures, findings and analysis for your review. Please <br /> feel free to contact Dave Jenkins at(916) 366-1701 if you have any questions or concerns. <br /> i Since y, ppFSS/p <br /> DMAD V. <br /> Dave Je ci E Kent Zenobi DEE <br /> r, <br /> ' c� JENNNS r ' <br /> Project Engineer wst9� �m Chief Environmental Engineer <br /> V7C5C0 envy <br /> DVJ:KEZ:sev <br /> cc: Mr. Michael Infurna F� � r. Marty Hartzell <br /> Environmental Health De nt California Regional Water Quality Control Board <br /> San Joaquin County Central Valley Region <br /> 122801SAC2R566 <br /> Copyright 2002 Kleinfclder,Inc. <br /> KLEINFELDER 2825 East Myrtle Street,Stockton, CA 95205-4794 (209)948-134.5 <br />