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Soil Vapor Extraction System <br /> DDJC-Sharpe April 1999 RPM Meeting <br /> Operation Progress Update <br /> • Sites P-6A and P-IE first phase of operations completed during 4Q98 <br /> - Asymptotic influent concentration below 0.35 ppmv observed within 3 weeks <br /> of initial operation at each site <br /> - Site P-6A VOC removal mass low (.22 versus 4 lbs..) <br /> • Site lA first phase operation in-progress since 28 December <br /> - System operation intermittent in January due to motor voltage problems <br /> - Influent concentration remains above 0.35 ppmv after 8 weeks of operation <br /> - Focused extraction begun on 8 April at wells VEW Al and A4 40 <br /> - Next SVE site planned for extraction is Circuit IA2 at Site IA <br /> 1 <br /> U.S. Army Corps <br /> of Engineers <br /> Engineering end <br /> Support Center,Huntsville <br />