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• (pounds per cubic foot) lug/l x 0 0000019/ug x 0 002205lb/g x <br /> 28 321/cf = 0 0000000621lb/cf <br /> The volume of air produced in one day, equals the flow rate (Q) x <br /> the time of flow. <br /> V = Q x T = cf/day = cf/min x 1440min/day <br /> The volume must be corrected to standard temperature and pressure <br /> (STP) <br /> P = Pressure = 14 7 lb/in2 @ STP <br /> V = Volume cf <br /> T = Temperature in degrees above absolute Zero = 491 58oR @ STP <br /> Using the Ideal Gas Law P1V1/T1 = P2V2/T2 <br /> Solving for V2 =P1V1T2/P2T1 <br /> Assuming P1 = P2 = 14 7 lb/int , P cancels from the equation <br /> leaving V2 = V1T2/Tl <br /> I <br /> V1 = Q cf/m x 1440 min/day <br /> T2 = 491 58oR T1 = 459 58 + ToF at site <br /> V2 = Q cf/min x 1440 min/day x 491 58oR/ (459 580 + ToF) <br /> X lb/day = C ug/l x 0 . 0000000621 lb 1/ug cf x Q cf/min x 1440 <br /> min/day x 491 580R/ (459 580 + ToF) <br /> Q for the Influent sample = The well flow rate + the air flow <br /> SUM14ARY <br /> There has been no evidence of floating product or product sheen <br /> on the ground water in MW1 since April 14 , 1992 and MW3 and MW10 <br /> since November 11, 1992 The last evidence of product , as a <br /> sheen in the condensate recovery system, was on March 1, 1993 <br /> Vapor recovery has reduced the hydrocarbons in ground water <br /> significantly since the May 25 , 1990 sampling, see Table 1 . <br /> On May 17, 1995 a sample of the water being treated by air <br /> stripping inside the "ConVault" was obtained for certified <br /> laboratory analysis This was accomplished to prove the <br /> suitability for dumping this cleaned water to the City of <br /> Stocxton• s sanitary sewer This water (800 gallons) was <br /> discharged to sewer on May 31, 1995 Since that time there has <br /> been no additional discharge to sewer <br /> Bio-venting of MW8 was initiated on October 26 , 1994 Sample <br /> results obtained of the ground water at and near MW8 suggests <br /> that this weekly venting is beneficial in controlling the <br /> migration of the gasoline hyrocarbon plume . <br /> As of August 15 , 1995 an estimated 12027 gallons of gasoline <br /> range hydrocarbons have been removed from the soil and ground <br /> PAGE 5 R603 UPDATE-40 8/29/95 <br />