Laserfiche WebLink
ARCADIS GERAGHTY&MILLER <br /> Table 1: SVE System Operational Parameters <br /> Chevron Service Station#9-4275 <br /> 2905 West Benjamin Holt Drive <br /> Stockton,California <br /> Date System System Influent <br /> Sample of Run-Timer Flow Rate Concentration <br /> Name Site Visit (hours) Rate(cfm) _ (ppmv) <br /> Influent 26-Feb-97 23,023 85 75 <br /> 26-Sep-97 23,411 95 54 <br /> 14-Oct-97 23,840 90 25 <br /> 13-Nov-97 24,106 70 31 <br /> 5-Dec-97 24,148 68 51 <br /> 23-Dec-97 24,586 50 2 <br /> 22-Jan-98 24,747 10 37 <br /> 6-Feb-98 24,785 10 ND(t2 4) <br /> Total hours of operation= 1,762 Average Flow Rate=60 cfm Average Influent Concentration=26 ppmv <br /> Estimated mass of petroleum hydrocarbons removed as vapor based on hours of operation, average flow rate <br /> and average influent concentration is approximately 37 pounds <br /> • Influent concentration measured using PID or analyzed by laboratory Gastech concentrations were not used <br /> due to a lack of correlation with laboratory data <br /> ppmv Parts per million by volume <br /> Emission rate calculated using weight fraction of TPPH in air multiplied by the mass throughput of air, <br /> as shown in the sample equation below <br /> Hours of Operation *Flow Rate(cfm)* 60 min/hour* air density (0 075 lb/ft3) *ppmv TPPH *MW Hexane(86)1 MW Air(29) <br /> Initial start-up conducted on February 26, 1997,however, system did not commence regular operation until September 10, 1997 <br /> System operation ceased following the February 1998 site visit due to high groundwater levels <br /> Project No RC000309 0010 CHEVN ZWBENJAM YABLESMASSRNVLXLS <br />