In Situ Hydrocarbon and Fuel Oxygenate Remediation by PulseOx Advanced Oxidation Using Ozone Gas and Hydrogen Peroxide(ABSTRACT)

摘要

In 1986 a car dealership opened for business on a site near downtown Las Vegas, Nevada. By the mid 1990s the city's rapid growth had transformed the surrounding area and increased demand for residential real estate. In 1999, the owner sold and relocated the car dealership in order to redevelop the 12-acre property into a residential high-rise condominium complex. In 2002-2003 during the early phases of the redevelopment project, an environmental assessment of the site identified a contaminant release from former vehicle fueling operations. Subsequent investigations revealed a BTEX and MTBE groundwater plume extending over approximately 1.5 acres of the site. MTBE concentrations up to 42,000 μg/L were found near the former source area with an MTBE plume extending some 200 feet in most directions. In 2007, Broadbent completed a site assessment and remedial design for the project. A number of alternatives were evaluated including conventional pump & treat, air stripping with carbon adsorption, soil vapor extraction (SVE), in situ chemical oxidation (ISCO), as well as natural attenuation. The extent of the MTBE plume was a limiting factor in the remedial selection as conventional alternatives proved costly due to the potential for long-term remediation and delays in project construction.