Laserfiche WebLink
n ~ ! ! J <br /> J <br /> CALCULATIONS <br /> To calculate the pounds (lb) per day the concentration is <br /> multiplied by the volume of air produced in one day. <br /> The lab reports the Concentrations (C) of the air sampling in <br /> ug/liter. The first step is to convert this value to lbs/cf <br /> (pounds per cubic foot) . <br /> 1 ug/l x 0 . 000001g/ug x 0 0022051g/g x 28 . 321/cf <br /> 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 <br /> pressure (STP) . "= <br /> P = Pressure = 1.4 . 7 lb/in2 @ STP <br /> V = Volume cf <br /> T = Temperature in degrees above absolute Zero = 491 580R Q STP. <br /> Using the Ideal Gas Law P1V1/T1 = P2V2/T2 <br /> Solving for V2 =P1V1T2/P2T1 <br /> Assuming P1 = P2 = 14 7 lb/in2, P cancels from the equation j <br /> leaving V2 = V1T2/T1 . <br /> V1 = Q cf/m x 1440 min/day <br /> T2 = 491 . 58oR T1 = 459 58 + ToF at sight . <br /> V2 = Q cf/min x 1440 min/day x 491 580R/ (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 . 58°R/ (459 . 580 + T°F) <br /> Q for the Influent and Effluent samples = The well flow rate + <br /> the air flow. <br /> VAPOR RECOVERY RESULTS <br /> As of December 30, 1993, the total system has recovered a <br /> calculated total of 18191 pounds of hydrocarbons, 5042 of which <br /> have been produced since the beginning of operations under the <br /> Authority to Construct . <br /> As of July 21, 1992 , the date it was destroyed, P1 had produced j <br /> 2 . 96 pounds of hydrocarbons or an additional 1 . 63 pounds since <br /> the beginning of operation under the Authority to Construct . See <br /> Table 1 . <br /> I <br /> page 4 of R604, 01/19/93 <br />