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i i <br /> • in extracted soil gas will continuously vary depending on changes in <br /> atmospheric pressure, soil temperature, soil moisture content, <br /> groundwater level and concentrations of gasoline hydrocarbons in <br /> groundwater Therefore, the IC engine will require periodic adjustment of <br /> dilution air, soil gas extraction, and supplemental fuel <br /> The IC engine will be operated 24-hour per day, seven days a week except <br /> during quarterly groundwater monitoring and during routine <br /> maintenance, which will include <br /> • Oil and filter changes every 200 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 / hour-meter <br /> • Air Sparge Blower pressure <br /> • Vapor Extraction Blower vacuum <br /> • Engine oil pressure <br /> • Coolant temperature <br /> © Spark arrestor between the blower and IC engine <br /> The IC engine will automatically shut down if the blower looses pressure <br /> or vacuum, the engine oil pressure becomes low, or of the coolant over <br /> heats <br /> A San Joaquin Valley Air Pollution Control District (SJVAPCD) permit to <br /> construct and operate the IC engine will be obtained that will allow t h e <br /> continuous operation of the IC engine <br /> 6 2 2 Vapor Extraction Flow Control and Metering System <br /> The extracted soil gas will flow from the vapor extraction wells through <br /> buried 2-inch schedule 40 PVC pipes to the flow control and metering <br /> manifold (Figures 7 and 12) A flow control and metering system will be <br /> mounted directly onto the vapor extraction well manifold A moisture <br /> knock-out drum that will remove most of the entrained liquid from the <br /> extracted soil gas will be installed between the vapor extraction manifold <br /> and the IC engine The flow control and metering system will be equipped <br /> with a ball valve, a Dwyer DS-300 flow sensor, a Dwyer Magnehelic 0-5 <br /> iwc differential pressure (DP) gauge, a Dwyer Minihelic II 0-60 iwc DP <br /> Frank's One Stop Remedial Action Plan — August 2001 <br /> -19- <br />