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ARCO Station 548 E 0 R <br /> 1612 West Hammer Lane,Stockton <br /> Remedial Action Plan <br /> May 31,2006 <br /> 2.4 Summary of Historical Remedial Feasibility Testing <br /> 16 <br /> Remedial feasibility testing has not been performed at the site; however an SVEIAS system <br /> operated at the site from September 2000 until June 2004. System Performance data is <br /> included in Appendix F. A summary of the SVEIAS operation data is included below. <br /> 2.4.1 SVEIAS System Operation <br /> In September 2000, RS in tailed an SVEIAS system at the site. Utilizing wells VW-1, VW-2, <br /> VW-3, VW-4, VW-5S, and VW-5D, SVE indicated respective radii of influence of approximately <br /> 30 fee oints AS-1, AS-2, and AS-3) were installed in the area of the former <br /> ..t� USTs and completed to depths between 60 and eet bgs respectively. The system was <br /> comprised o a Ing uc - Ca a ytic Oxidizer (Cat-Ox), and a vacuum extraction <br /> rj blower. The average flow rate was approximately 53 standard cubic feet per minute (scfm). <br /> The SVEIAS system removed approximately 2,100 lbs of TPHg during operation. Influent TPHg <br /> concentrations decreased from 310 parts per million by volume (ppmv) in November 2003 to <br /> 3 ppmv in February 2004. The system was turned off in June 2004 because of low influent <br /> concentrations; however the system was left at the site. <br /> i <br /> I <br /> I <br /> I <br /> i <br /> I <br /> i <br /> i:18P-ARC0104 BP Valley Portfolio15481Reports\RAP1548 RAP.doc 4 <br />