Gas Station Petroleum Hydrocarbon TMA Treatment

MARKET
Upstream Oil and Gas

LOCATION

Confidential

SERVICE
Targeted Microbial Applications (TMA)

CLIENT

Confidential

PROJECTS \ CASE STUDY

Gas Station Petroleum Hydrocarbon TMA Treatment

A gasoline station with gasoline and waste oil contamination affecting an area of approximately 120’ x 150’ extending to a depth of 12’ below ground surface was remediated to the regulatory acceptable standards using in Situ Bioremediation technology. The soil lithology in the zone of contamination primarily consisted of clayey silts and silty clays. The initial site assessment revealed gasoline concentration ranging from below detection limits to 2,100 PPM, and oil and grease concentrations from below detection limits to 6.500 Parts Per Million (PPM). Additional sampling conducted during the remediation period indicated elevated levels (22.00 PPM) of oil and grease within the remediation area. After conducting an unsuccessful pilot scale study of a vacuum extraction system, an In Situ Bioremediation (bioconduit) approach was implemented. Approximately 2,700 linear feet of horizontal ISBRs were installed beneath the concrete slab and the existing structures with minimal disturbance. Within one year of the initiation of the remediation system, the concentrations of oil and grease were reduced to 79 mg/kg (PPM). This represents a 99.6% reduction in contaminant concentrations.