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N . 4 _� Soil ras Moisture Removal A 55-gallon steel drum equipped with a double bung ltd is used as a moisture knock-out dium This drum is located between the VE well manifold and the 1C engine The knock-out drum iemoves most of the liquid moisture entrained in the extracted Soil gas to prevent the enti wined liquid fiom entering the intake of the IC engine Large amounts of liquid water entering the intake of the IC engine could damage the engine 4_4 System _ Monitoring and Sam 11� ing The VE system is equipped with a 114-inch diameter brass sample pot t located dust after the VE well manifold (all wells combined) to monitor soil ,,as VOC levels and collect soil gas samples An organic vapor meter (OVM) is used to measure VOC levels in extracted soil gas on a weekly basis Influent soil gas samples are collected in TedlarO bags from t h e sample port on a monthly basis These samples are analyzed by a state certified analytical laboratory for total petroleum hydrocarbons as gasoline (TPH-G), benzene, toluene, ethylbenzene and xylenes • (collectively known as BTEX), 5 oxygenates and lead scavengers by EPA Method 8260 The soil gas flow and chemical analyses data will be used for the following purposes • Calculate the quantity of VOCs extracted by the VE/AS system • Detect possible asymptotic VOC concentiatrons that could possibly indicate the end point to the VE/AS project L5 Groundwater Air-Sparging System I ASE installed an in-situ AS system for remediation of dissolved and separate-phase petroleum groundwater contamination on the subject property The AS system injects clean compressed air below the impacted groundwater surface at approximately 17 to 19-feet bgs through seven ( 7 ) AS wells to strip petroleum contamination from the groundwater and soil The AS system also increases the dissolved oxygen levels in the groundwater which enhances natural biodegradation of hydrocarbons in the impacted groundwater and soil Frank's One Stop ASNE Remediation System Installation Report — February 2002 -5-