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_ <br /> v <br /> ON <br /> P - Pressure a 14.7 lb/in2 B STP <br /> d. V - Volume cf <br /> � ! T - Temperature in degrees above absolute Zero 491.58oR STP. <br /> Using the Ideal Gas Lax P1VI/Tl a P2V2/T2 <br /> Solving for V2 -P1V1T2/P2TI <br /> Assuming PZ s P2 a 14.7 lb/f.n2, P cancels from the equation <br /> leaving V2 a V1T2/Tl. <br /> Vl - Q cf/m x 1440 min/day <br /> T2 - 491.58oR <br /> Tl 459.58 + ToF at sight. <br /> V2 R Q cf/min x 1440 min/day x 491.58oR/(459.58o + ToF) <br /> Q2 = Flow rate at standard temperature and pressure <br /> V2 - Q2 cf/min x 1440 min/day <br /> Q2 - Q cf/min 491.58oR/(459.58o + ToF) <br /> X lb/day d C ug/l x 0.0000000621 lb 1/ug cf x Q2 cf/min x <br /> 1440 min/day <br /> PILOT TEST RESULTS <br /> Vacuum readings derived from the extraction wells (EX, PI and P3) <br /> show a tight formation, high vacuum. Also vacuum readings <br /> obtained from the ground water monitor wells show vacuum influence <br /> covering most of the site with the exception of MW-6, see Figure. <br /> The bag samples obtained from the exhaust of the blower indicate <br /> that 59.2 pounds per day of total fuel hydrocarbons can be <br /> s produced from the three extraction wells with an average flow rate <br /> of 30 cubic feet per minute from the formation. This vapor stream <br /> contains 0.92 pounds per day of Benzene, 2.04 pounds per day of <br /> Toluene, 0.74 pounds per day of Ethyl Benzene and 11.3 pounds per <br /> day of Xylenes, indicating an aged petroleum product <br /> contamination problem. <br /> VAPOR EXTRACTION CONTROL <br /> The site, prior to removal of the underground storage tanks and <br /> gasoline dispensing system, operated as a Regal Service Station. <br /> The station was allotted a poundage rate that could be released <br /> from the dispenser nozzels and tank vents from its retail <br /> operations. With this in mind, that prior allotment should be <br /> allowed for the remediation of this site. <br /> Western Geo-Engineers has engineered, installed and are monitoring <br /> various ongoing vapor extraction systems throughout Northern <br /> California. A system that is economical and relatively <br /> maintenance free is emission rate control by the infrared (IR) <br /> Total Petroleum Hydrocarbon analyzer with valve controls that <br /> regulate the amount of vapors extracted from the wells and/or shut <br /> down the blower if emissions exceed the predetermined warning <br /> concentrations. <br />