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1 <br />' Vapor Extraction System Sample Calculations <br /> Moore Petroleum,Inc, 14800 W Frontage Road,Manteca, CA <br />' In the case of February 28, 1995, the average volumetric extraction rate of TPH, as gasoline, for <br /> the period between February 21, 1995 and February 28, 1995 is found by averaging the <br />' volumetric extraction rate on February 21, 1995 and February 28, 1995 This is done as follows <br /> (IBE-05-! +2 0E-05 !b <br />' gal gal -1 9E-05 lb TPH,as gasoline <br /> 2 gal <br /> The result is 19E-05 lb/gal of TPH, as gasoline Thus method may be applied to the benzene <br />' extraction rates for tlus same period resulting in 3 55E-061b/gal of benzene These average <br /> volumetric rates may be applied over the time period of interest From February 21, 1995 to <br /> February 28, the water treatment system pumped 510 gallons of liquid The total flow for the <br />' period of interest multiplied by the average volumetric extraction rate for each substance of <br /> interest will result in an extraction total for the period of interest The result is as follows <br /> TPH,as gasoline 19E-05 lb x510gal=9 7E--03 A <br /> gal <br />' Benzene 3 55E--06 lb x510ga1-1 8E-03 lb <br /> day <br />' Therefore from theeri <br /> p od of February 21, 1995 to February 28, 9 7E-03 pounds of TPH, as <br /> gasoline, was extracted and 1 8E-03 pounds of benzene was extracted To calculate the <br /> cumulative quantity of extracted substances, the quantity extracted for a period will be added to <br /> the previous cumulative quantity extracted for each substance In the case of TPH, as gasoline, <br />' 9 7E-03 pounds will be added to 0 20 pounds, wliuch will yield 0 21 pounds In the case of <br /> benzene, 1 8E-03 pounds will be added to 0 028 pounds to yield 0 030 pounds of benzene <br />