P14

USE OF MOBILE, DUAL-PHASE EXTRACTION TECHNOLOGY FOR REMEDIATION OF UST SITES

SCS Engineers (SCS) subcontracted with a proprietary dual-phase extraction subcontractor to perform three, 8-hour-long events at each site. The subcontractor uses a truck mounted high-pressure, high-flow vacuum truck; vacuum hoses that are connected to each well; and a well head stinger pipe which is placed in the wells. The patented stinger pipe design consists of a 1-inch diameter PVC pipe with small slots cut along the length of the pipe for removal of ground water and soil vapors. A high air flow (over 3,000 cubic feet per minute) and high vacuum (25 to 30 inches of mercury) are used to remove petroleum-impacted ground water, free phase product, and vapors.

Key words: dual phase extraction, ground water, petroleum, hydrocarbons