In situ bioremediation reduced ground water contamination by more than 99% in less than a year at a gas station in Florida.
Convenience Store in Florida
After three underground storage tanks were removed from the location of a convenience store, investigation showed that petroleum contamination was present in small area near the former dispenser island. The vadose-zone contaminated soil was excavation and disposed off-site. Ground water monitoring showed that the ground water impact was limited to a small area near the source of contamination. The decision was made to close the site by applying Petrox® bioremediation to the ground water.
Ground Water Contamination
The ground water contamination was in a shallow water table aquifer that had a medium permeability. The contamination was a suite of BTEX, PAHs, methylnaphthalene isomers and TRPH.
A pilot study was completed to determine feasibility of Petrox bioremediation combined with a peroxide oxygen supplement. The pilot study reduced contaminant concentrations by up to 92%. A full-scale application completed the site remediation.
The pilot study and full-scale applications of Petrox and an oxygen supplement reduced BTEX compounds by >99%, naphthalene by 99%, TRPH by 96% and naphthalene isomers by 88% to achieve the remediation goals and site closure. The microbial cost for the pilot study and full-scale treatment was less than $2,000.
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