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Vapor Extraction System Sample Calculations <br /> Moore Petroleum,Inc.,5491 "F"Street,Banta,CA <br /> In the case of September 19, 1995, the average daily extraction rate of TPH; as gasoline, for the <br /> period between August 15, 1995 and September 19, 1995 is found by averaging <br /> extraction rate on August 15, 1995 and September 19, 1995. This is done asfollowdaily <br /> r <br /> (1.3 lb-+8.0lb ) <br /> day2 -day—=4.7— <br /> TPH,as gasoline <br /> ay <br /> The result is 4.7 lb/day of TPH, as gasoline. This method may be applied to the benzene <br /> extraction rates for this same period resulting in 0.10 lb/day of benzene. These average extraction <br /> rates may be applied over the time period of interest. From August 15, 1995 to September 19, <br /> 1995, the vapor extraction system operated for 739 hours. The operating time maybe converted <br /> to units of days and then multiplied by the average daily extraction rate for each substance of <br /> interest. The result is as follows: <br /> lb <br /> TPH,as gasoline: 4.7 x739hrsx lday =140 lb <br /> day 24 hrs <br /> Benzene: 0.10 lb x739hrsx 1 day =3.1 lb <br /> f day 24 hrs <br /> t� <br /> Therefore, from the period of August 15, 1995 through September 19, 1995, 140 pounds of TPH, <br /> a <br /> as gasoline, was extracted and 3.1 pounds of benzene was extracted. To calculate the cumulative <br /> quantity of extracted substances, the quantity extracted for a period will be added to the previous f <br /> cumulative quantity extracted for each substance. In the case of TPH, as gasoline, 140 pounds <br /> will be added to 1,260 pounds, which will yield 1,400 pounds. In the case of benzene, 3.1 pounds <br /> will be added to 8.4 pounds to yield 11.5 pounds of benzene. <br /> 4 <br /> 1 <br /> kI <br /> -r <br />