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i <br /> o eologicat Technics Inc. <br /> 1101 7"'Street <br /> Modesto,Cal9/Fax(20 953542- L! 11 IEC E� U E D <br /> (209)522-4119/Fax(209)522-4227 D <br /> NOV 4 2008 <br /> October 30, 2008 <br /> EvviRaNMeiv.T NrAl_-rH <br /> f Project No.: 770.2 PERM 1-1 <br /> Project Name: Marci Property(Loomis Rd) <br /> Mrs. Margaret Marci <br /> 20 Mobile Lane <br /> Crescent City,CA 95531 <br /> RE: Work Plan: Soil Vapor and Dual Phase Extraction Pilot Test <br /> Former Marci's Diesel Service(Marci Property), 2969 Loomis Road, Stockton,CA <br /> Dear Mrs. Marci: <br /> Geological Technics Inc. has prepared the following Pilot Test work plan in response to the <br /> San Joaquin County Environmental Health Department (SJCEHD) directive in their <br /> correspondence dated October 17, 2008. , Geological Technics Inc. tested several <br /> methodologies including bioventing, biosparging, soil vapor extraction and dual phase <br /> extraction between November 26 and December 14, 2007 on-site to find the best <br /> methodology to address the residual diesel contamination at the 2969 Loomis Road site in <br /> Stockton, California. <br /> The results of the tests conducted during the above mentioned 20-day period was reported by <br /> GTI on March 5, 2008. SJCEHD in response to this report directed GTI to do further tests on <br /> Dual Phase Extraction (DPE) methodology as it appears more effective than bioventing and <br /> rbiosparging and the previous pilot test failed to quantify TPH-Gasoline and TPH-Diesel in <br /> the extracted soil vapor. The following work plan explains further DPE tests in detail. If you <br /> have any questions, please do not hesitate to call me at(209) 522-4119. <br /> i <br /> Respectfiluy submitted, <br /> I <br /> Raynold i. Kablanow II, Ph.D. <br /> Vice President <br /> I <br /> cc: Vicki McCartney - SJC PHS/EIM <br /> James L Barton-CRWQCB-CVR <br /> f USTCFP �=; i <br /> John Marci,Jr., 2973 Loomis Road, Stockton, CA 95205 <br />