Innovative Design and Implementation of Air Sparge System for the Treatment of VOCs, SVOCs, and Arsenic

摘要

Background. An air sparging alternative was compared to a biosparging remedy for groundwater impacted with volatile organic compounds (VOCs), semivolatile organic compounds (SVOCs), and arsenic constituents of concern (COC) in a complex geologic setting at a state-mandated cleanup program site in northern New Jersey. The operation of the biosparging system was started at the site in 2002 to address the COC impacts within an approximate one-half acre area designated as the Former Lagoon Area (FLA). The system was decommissioned in August 2012 due to its lack of effectiveness. Due to the sustained presence of nonaqueous-phase liquid (NAPL) within the FLA, an excavation was performed in October 2012 consisting of removal and off-site disposal of approximately 2,200 tons of NAPL-impacted soil and 52,000 gallons of groundwater. A modified remedial strategy consisting of an air sparge system was developed and implemented in 2013 to address the residual groundwater impacts at the FLA.