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P = Pressure = 14 7 lb/int @ 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 /> V1 = Q cf/m x 1440 min/day <br /> T2 = 491 5808 Tl = 459 58 + TOF at sight <br /> V2 = Q cf/min x 1440 min/day x 491 580R/ (459 580 + TOF) <br /> X 1b/day = C ug/l x 0 0000000621 lb 1/ug cf x Q cf/min x 1440 <br /> min/day x 491 58oR/ (459 580 + TOF) <br /> Q for the Influent sample = The well flow rate + the air flow <br /> SUMMARY <br /> Presently the vapor extraction system at Former Regal Station <br /> 603 , PTO ## N-1090-1--0 , is having limited effect on the leading <br /> edge of the dissolved gasoline range plume that has traveled east <br /> from the site, across Pacific Avenue Two sources tests , of two <br /> hours each, were conducted on MW8 The well is near the leading <br /> edge of the plume and results indicate that a two hour vacuum <br /> extraction once a week will help control the migration of the <br /> plume and will enhance biodegradation by removing CO2 while <br /> limiting hydrocarbon removal to less than 0 1 pound per week <br /> We are proposing to utilize LTT vacuum trucks to pull an <br /> estimated 11 feet of water vacuum on MW8 , for two hours once a <br /> week and exhaust directly to atmosphere This vacuum will <br /> generate a flow rate of approximately 20 cfm <br /> Please give me a call if this proposal would create a problem <br /> with the Air District at ( 916) 668 -5300 <br /> Sincer -Ly you s , <br /> George onverse <br /> Pro-) t Geolocrist - WEGE <br /> cc /John Margowski, Wickland Properties (916) 978-2485 <br /> Mary Meays, San Joaquin County Health (209) 468-0337 <br /> 4 <br />