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INTERIM RE#zDIATION PLAN <br /> I►situ Soil Vapor Extraction Systera <br /> Ultramar Service Station No. 502 <br /> 35 North Cherokee Lane <br /> Lodi, California <br /> 6 February 1992 <br /> INTRODUCTION <br /> EVAX Technologies, Inc. ([VAX) has been retained by Ultramar' Inc. <br /> (Ultramar) to operate an insitu soil vapor extraction system (VES) at <br /> Ultramar Station No. 502 located at 35 North Cherokee Lane in Lodi. This <br /> document describesthe Interim Remediation Plan for this site including <br /> the site conditions, prior remediation, the YES feasibility study, saiem <br /> - design and risk assessment. A catalytic incinerator will be used for <br /> 4. abatement of the extracted soil vapors. <br /> A VES was previously installed and operated at this site by EVAX <br /> r Technologies during the Fall of 1989. Consequently, , the prior <br /> construction of the system is beyond the scope of-:the <br /> P present interim <br /> remediation plan. The present plan basically involves the installation <br /> Of a 100 standard cubic foot per minute (scfm) catalytic incinerator for <br /> s.: economical long-term destruction of extracted gasoline vapors. <br /> 4 PRINCIPLE OF OPERATION <br /> - i <br /> Soil vapor extraction involves the removal of volatile organic compeund, <br /> from subsurface soils by mechanically inducing air flow through the 'Yoi; <br /> matrix. This, is accomplished by applying a vacuum to extraction wells <br /> located in the plume. This insitu (in-place) approach <br /> remediation does not require excavation therelr+: ) pp to soil <br /> emissions commonly associated with excavation and stockpiling large fugitive <br /> SITE DESCRIPTION <br /> -- -The subject-site-is-an--Ultramar Service Station located at the corner of. T- - <br /> North Cherokee and Elm Streets in Lodi. The site is shown. in Figure I of <br /> Appendix R. Previous environmental work W been completed at this site. <br />