Client: Environmental Consulting Firm
Type of Facility: Service Station
Location: Atlanta, Georgia

EcoVac Services was contacted by a state trust fund contractor to initiate EFR® on an emergency response basis. High levels of gasoline vapors were detected in a sanitary sewer line near downtown Atlanta and approximately two city blocks were partially evacuated (including a nursing home) as a precautionary measure. EFR® was implemented at seven monitor wells, which resulted in the gasoline vapors being completely removed from the sanitary sewer within hours. Consequently, the 24 hour police and fire department surveillance was discontinued. In excess of an estimated 2,700 equivalent gallons of gasoline were recovered during the initial 47 hours of EFR® at a cost of approximately $17,173. A calculated total of 8,997 equivalent gallons of gasoline were removed from the site.

Client: Trucking Company
Type of Facility: Former Trucking Facility
Location: Jackson, Mississippi

An estimated total of 5,670 equivalent gallons of diesel were removed during a single 8 hour EFR® event. Separate phase diesel exists in four monitor wells at a maximum thickness of 6 feet. An estimated total of 22,869 equivalent gallons of diesel have been removal during EFR®, which has been implemented at a cost of $48,152 (including a significant cost for disposal), or $2.11 per removed gallon of diesel. A surfactant was introduced into the subsurface several months prior to the initial EFR® event, which appears to have dramatically enhanced the diesel recovery volumes.

Client: Major Oil Company
Type of Facility: Refinery
Location: Puerto Rico

EcoVac Services was retained to conduct a feasibility study to assess the efficacy of free product removal by EFR®. This site is under U.S. EPA administrative order. Pilot testing was conducted at various locations throughout the refinery. The site did not appear to be an ideal candidate for EFR® due to a shallow water table and the lack of an impervious surface cover. Offgas concentrations >100,000 ppm were prevalent during most of the pilot test period and >9,200 pounds of VOCs were removed over a 54 hour pilot testing period. On the basis of the results of the feasibility study, the client is purchasing a vacuum truck and an internal combustion engine (to treat the offgases) and EFR® was subsequently implemented as a corrective action measure at this site. Initial results indicate that product is being removed at a cost of approximately $0.96/gallon.

Client: Environmental Consulting Firm
Type of Facility: Snack Food Manufacturing Facility
Location: Gentry, Arkansas

A single 8 hour EFR® event was conducted at a site where diesel fuel had persisted in three monitor wells at a thickness of 0.07 to 0.20 feet. Free product was removed from the site and was absent one year after this extraction event, which was conducted at a cost of $3,560. Site closure was obtained for the site.

Client: Environmental Consulting Firm
Type of Facility: Service Station
Location: Dublin, Georgia

Two EFR® events removed a small measurable amount of SPH (0.05 feet in two wells) at this site at a cost of $5,813.