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I <br /> f <br /> R_RMA <br /> � o One cartridge prefilter 1,000 <br /> o One 375-gallon surge tank 900 <br /> $42,900 <br /> Estimated Total Capital Cost: <br /> The estimated cost of operation and maintenance (O & M) of <br /> the system for a period of one year is as follows: <br /> o O & M ($2,000 + $150/pump/month) $25,800 <br /> o Carbon replacement (28 lbs./mo. @ $6/lb. ) 2,000 <br /> f:a <br /> Assumptions: <br /> -. c-.Istem flow rate of 5 gpm <br /> - Average initial TPH-G concentration = 1 ppm <br /> - Adsorption capacity of liquid-phase <br /> carbon is approximately 6.5 pounds of <br /> gasoline-range hydrocarbon constituents <br /> ! ; per 100 pounds of carbon <br /> k 500 <br /> o NPDES annual permit fee <br /> t°? <br /> 6,500 <br /> a Sample analysis <br /> Estimated Total 0 & M cost for one year: $34,800 <br /> $77,700 <br /> Total estimated cost with one year 0 & M: <br /> 4 ; <br />