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s <br /> iblower is extracting approximately 50 to 60 cubic teet pea minute (clm) <br /> at 1750 revolutions pei minute (i pm) <br /> The IC engine requires a continuous supply of propane as supplemental <br /> fuel Since the vapot levels of the extiacted sot] aie too low to sustain <br /> combustion of the IC engine The use of supplemental fuel also stabilizes <br /> the operation of the IC engine because the vapor levels in extracted soil <br /> -as continuously vaiy depending on changes in atmosphei is pressure soil <br /> temperature soil moisture content, ground" atei level and concentiations <br /> of gasoline hydrocarbons in groundwater The IC engine requires periodic <br /> adjustment of dilution air, soil gas extiaction rate, and supplemental fuel <br /> The IC engine operates 24-hour per day, seven days a week except during <br /> quarterly groundwater monitoring and during routine maintenance, which <br /> includes <br /> • Oil and falter changes every 250 hours of operation <br /> • Coolant and oil level check every two days of operation <br /> • Tune-up every month of operation <br /> • The IC engine is equipped with the following instrumentation and safety <br /> equipment <br /> Tachometer 1 hour-meter <br /> Ali-Spaige Blower pressure gauge <br /> • Vapor-Extraction Blower vacuum gauge <br /> • Engine oil pressure gauge <br /> • Coolant temperature gauge <br /> • Spark arrestor between the blower and IC engine <br /> The IC engine automatically shuts down if the blower looses pressure or <br /> vacuum, the engine oil pressure becomes 1wN or if the coolant overheats <br /> 4.2 Vanor Extraction Flow Control and Metering _ System <br /> The extracted soil gas flows from the VE wells through buried 1 5-inch <br /> diameter schedule 40 PVC pipes to the flow control and metering manifold <br /> (Figure 4) A flow control and metering system is mounted directly onto <br /> the VE well manifold The flow control and metering system consists of a <br /> ball valve and a Dwyer Minihelic 11 0-10 inches of water column (iwc.) <br /> gauge for each individual VE well, and a 0-200 degree Fahrenheit <br /> • temperature gauge <br /> Frank's One Stop AS/VE Remediation System Installation Report — February 2002 <br /> -4- <br />