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' and chain of custody record is attached in Appendix A A graph showing <br /> the historical TPH-G concentrations in the influent water samples is <br /> attached in the Graph Section of this report <br /> I uent .Air ,S'amj2le <br /> On February 21, 2002, ASE collected an influent air sample (INF-VE- <br /> 02 21 02) from the manifold of the 7 VE wells This sample was analyzed <br /> by Kiff Analytical of Davis, California (FLAP #2236) for TPH-G, BTEX, the <br /> five fuel oxygenates, and lead scavengers by EPA Method 8260B The <br />' analytical results for this sample are tabulated in Table Two The influent <br /> air sample analytical report and chain of custody record is attached in <br /> Appendix A <br /> MONTHLY FUEL RECOVERY CALCULATIONS <br /> Mass Removed ft CLt:aujjdwater Recovery System <br />' The influent TPH-G concentration in water was used to calculate the <br /> estimated mass removed from the site during the month based on total <br />' . gallons treated The Monthly Performance Log is presented as Table <br /> Three It shows that based on the number of gallons extracted to the <br /> month, which was 100,150 gallons, and assuming a constant TPH-G <br />' concentration of 3,800 parts per billion in the influent water stream, the <br /> system recovered 052 gallons of gasoline from the groundwater beneath <br /> the site To date, it is estimated that 131 44 gallons of gasoline have been <br />' removed from the subsurface <br /> Ma.c.c Removed by AS/VF .System <br /> 1 <br /> The influent TPH-G concentration in air was used to calculate the <br />' estimated mass removed from the vadose-zone beneath the site during <br /> the month based on the volume of air removed The Monthly Mass <br /> Extraction Calculations are presented as Table Four It shows that based <br />' on an average extraction flow rate of 62 cfm, and assuming a constant <br /> TPH-G concentration of 1,100 ug/l in the influent air stream, the system <br /> recovered 098 gallons of gasoline per day from the vadose-zone The <br />' system operated all 28 days in the month, and thus 27 44 gallons o f <br /> gasoline were extracted from the vadose-zone during the month To date, <br />' the ASNE remediation system has recovered and remediated 82 92 <br /> gallons of gasoline at the site <br /> Frank's One Stop Remediation System's Monthly Report — February 2002 <br />' -4- <br />