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qe0togicat Technics Inc. <br /> 1 101 7°i Street <br /> Ori Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 <br /> September 8, 2003 <br /> Project No.: 723.2 <br /> Project Name: Valentine (Castle Motors) , <br /> Mr. Stephen Valentine <br /> 6232 Hemet Avenue <br /> Stockton, CA 95207 <br /> LRE: Feasibility Study -- Dual Phase Extraction <br /> Valentine (Castle Motors), 2315 N. El Dorado Street, Stockton, CA <br /> { <br /> Dear Mr. Valentine: <br /> Geological Technics Inc. is pleased to present the following feasibility study work plan for a <br /> dual phase extraction pilot test at the 2315 N. El Dorado Street, Stockton, California. It has <br /> been ten years since the initial soil borings were installed to determine the impact from the <br /> gasoline release at the site., Although additional wells are proposed for installation to <br /> complete'plume definition, further delay in addressing the clean up of the plume allows it to <br /> continue to migrate off site. This work plan is intended to begin the process of remediating <br /> the contamination rather than just monitoring it. <br /> The dual phase extraction testing is intended to evaluate the feasibility of utilizing both soil <br /> vapor and groundwater extraction technologies to treat the gasoline plume at the site., An <br /> added benefit to this work is the removal of contaminant mass during the extraction testing <br /> work. <br /> If you have any questions or need additional information, please contact me. Thank you for <br /> this opportunity to serve your environinental needs. <br /> Respectfully Submitted, <br /> i <br /> Raynold I. Kablanow II, Ph.D. <br /> Vice President <br /> cc: Margaret Lagorio — SJC PHS/EHD <br /> Mark List- CRWQCB-CVR <br /> USTCFP <br />� CC <br />