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GBI Installs Butane Injection SystemTM To Cleanup Florida UST Site
In February, GBI installed Butane Biostimulation Technologies at its first Florida site. The City of Keystone Heights maintenance site was contaminated by an underground storage tank (UST) in 1997 that leaked diesel fuel into the site soil and groundwater. The target contaminants at the site include toluene, ethylbenzene, xylene, polycyclic aromatic hydrocarbons (PAHs) and napthalene, all components of diesel fuel. The city qualified for petroleum cleanup funds (75% of the total cleanup cost) through the Florida Department of Environmental Protection (FLDEP). "The FLDEP evaluate several types of innovative technologies and selected this one because it has the shortest cleanup time and is most cost effective, " says Carolyn Voyles, an environmental specialist with the Bureau of Petroleum Storage Systems (BPSS) of the FLDEP (Lake Region Monitor, 2/21/02). The FLDEP approved Butane Injection for use in Florida in 2000, after conducting research that concluded butane is non - toxic and suitable for injection into soil and groundwater as a food source for naturally occurring bacteria that are able to degrade a variety of contaminants.
Cape Cod Site uses Butane to Remediate Petroleum Contamination
In December 2001, GBI installed a Butane Injector 2000 to remediate petroleum contamination resulting from two leaking USTs at a 2 acre site on Cape Cod. Before introducing the Butane System, approximately 20 gallons water and non-aqueous phase liquid (NAPL) oil were initially recovered through bailing. Several remediation technologies, including chemical oxidation and butane biostimulation, among others, were considered. It was determined that butane would be the most appropriate and economical option for obtaining a permanent solution in a timely manner, due to the concentration of pollutants at the site. Following removal of all NAPL, as well as excavation of surficial low level contaminated soil that was transported for recycling through asphalt batching, butane injection was implemented in conjunction with air sparging and a soil vapor extraction/ vapor reinjection system. The remedial objectives for the site include reducing groundwater and soil concentrations of the contaminants of concern to below GW-2, GW-3, S-2/GW-2and S-2/GW-3 standards and eliminating the potential for migration of contaminants from the soil in the source area to the groundwater.
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