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Jun 6 1995 4 20?M IEG TECHNOLOGIES No 2615 P 21/34 w 1 � . CASE HISTORY OF HYDROCARBON REMEDIATION USING THE UVB TECHNOLOGY AT A UST SITE IN TROUTMAN, NC by William G Langley and Eric J Klingel IEG Technologies ki Charlotte. NC J. Kevin Slaughter EA Engineering, Science and Technology Charlotte, NC Elliot .1 Nightingale Nightingale Geologic Consultants. P C. Charlotte, NC Abstract UVB (German acronym for "Vacuum Vaporizer Well") is a patented m-situ remediation technology for the restoration of aquifers, the vadose zone, and the capillary fringe. The UVB technology can be applied to treat single- or multi-phase volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). The UVB system uses a combination of physical and biological processes for the removal of organic contaminants. The UVB can be configured to simultaneously treat the saturated zone, capillary fringe, and/or vadose zone. The UVB is a true in-situ process in that there is no above-ground water treatment or discharge. Only the off air stream is vented at the surface. Since its inception in 1986, the UVB technology has been applied at some eighty sights in Europe The technology has achieved regulatory acceptance in the U.S. at both the state and federal levels A UVB system was fust installed at a US. site in September 1992 Currently, there are twenty-two UVSs installed and operating in eight states in the U S. This paper describes the remediation progress using the UVB at an underground storage tank (UST) site in Troutman, North Carolina. After twenty-five months of operating the UVB at this site, the magnitude and extent of the dissolved petroleum hydrocarbon (BTEX) plume has been significantly reduced. Introduction UV8 (Unterdruck Verdamfer Brunnen - German for Vacuum Vaporizer Weil) is a patented technology that offers a number of variations for the treatment of adsorbed, dissolved, and free phase VOCs and SVOCs. (Patent held by IEG mbH, D-72770, Reutlingen, Germany.) It is highly adaptable to varying hydrogeologrc conditions including confined and unconfined aquifers, and aquitards Simultaneous treatment of the vadose zone capillary fringe, and saturated zone is possible. At the present time in the U S , twenty-two UVSs are operating in eight states Following a brief narrative on the basic system concept, a description of the treatment zone and monitoring results are presented for a UVB which has been operating for twenty-five months at a UST site in Troutman, North Carolina