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The system was initially configured to extract soil vapors from VW-1. The initial vapor <br /> ` extraction rate was 13 standard cubic feet per minute(SCFM). Based'on a vapor sample <br /> f <br /> analytical results on May 4, 1995, the system extraction rate was 58 pounds per day(lb./day) as <br /> total petroleum hydrocarbons, as gasoline(TPHg) and 0.401b./day benzene. System operating <br /> data calculations are contained in Attachment 3, as Table 1. Extraction rates and analytical results <br /> to date are contained in Attachment 3, as Table 2. <br /> L . <br /> Influent and eluent vapor samples have been collected on a monthly basis to demonstrate <br /> compliance with the.SJVUAPCD Permit conditions. The samples were collected according to the <br /> Apex SOP included in Attachment 1 and submitted, under chain-of-custody,to Sparger <br /> Technology, Inc. of Sacramento; California, a state-certified laboratory. The samples were <br /> analyzed for concentrations of TPHg and benzene, toluene, ethylbenzene and total xylenes. <br /> Analytical reports and chain-of-custody forms are included in Attachment 2. <br /> f REPORT DISTRIBUTION <br /> Apex submitted copies of this report to: <br /> r <br /> 1. Ms. E. Thayer <br /> Central Valley Regional Water Control Board <br /> r 3443 Routier Road, Suite'A' <br /> Sacramento, California 95827-3098 <br /> r 2. Ms. M. Lagorio <br /> t1--� San Joaquin County Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> 3. Mr. Craig Mitchell <br /> San Joaquin Valley Unified Air Board <br /> 4230,Kierman Ave., Suite 130 <br /> Modesto, California 95356 <br /> L <br /> L <br /> L <br /> f <br /> 3 <br /> L , <br />