Project Summary - Page 3

Client: Environmental Consulting Firm
Type of Facility: Service Station
Location: Memphis, Tennessee

Two events of EFR® were performed at a site where an active groundwater pump and treatment system had been operating for a period of years. Very good vacuum influence and recovery of petroleum hydrocarbons were achieved at the site. Not only were the two treatments successful in removing the free product (as much as 0.08 feet), EFR® also significantly reduced dissolved phase TPH-GRO to "monitoring only" limits of <1,000 ppb (compared to >100,000 ppb prior to EFR®) and benzene to <70 ppb. The client did not think that these closure limits were achievable at this site with any technology, given the challenging hydrogeologic conditions at the site. The client has since requested "monitoring only" and discontinued operation of the remediation system. Total cost for EFR® was only $5,074. (pmi)

Client: Environmental Consulting Firm
Type of Facility: Service Station
Location: Jackson, Tennessee

EcoVac Services teamed with a small environmental consulting firm to reduce dissolved phase petroleum hydrocarbon concentrations at a former auto repair shop / service station from greater than 20 ppm to below "monitoring only" criteria (i.e. <1 ppm). Two EFR® events were conducted and the environmental consulting firm also employed oxygen release compound (ORC) in the monitor wells. Dissolved phase petroleum hydrocarbon concentrations were successfully reduced to beneath the "monitoring only" criteria. The cost to implement EFR® was $7,208. (emc2)

Client: Major Oil Company
Type of Facility: Service Station
Location: Memphis, Tennessee

Over 10 feet of free product was discovered in a downgradient monitor well located at an active service station site. Four EFR® events were performed (within a period of 45 days) at an approximate cost of $10,000 and the free product was reduced to 0.00 feet. (a767)

Client: Environmental Consulting Firm
Type of Facility: Apartment Complex
Location: Washington, D.C.

A single EFR® event was conducted at a former fuel oil UST site at which free product was unsuccessfully addressed by prior remedial efforts. The site was widely known within the environmental community as a result of the prior unsuccessful efforts. The site posed particular logistical challenges, for example, having to perform EFR® on multiple levels of a parking garage. Offgas treatment was implemented and the fuel oil free product was removed from all four monitor wells following a single nine hour EFR® event.

Client: Major Oil Company
Type of Facility: Former Service Station
Location: Fort Valley, Georgia

EcoVac Services was retained to conduct two EFR® events at a former UST site where a small amount of free product existed. After two EFR® events not only was the free product removed, but the dissolved phase concentrations were significantly reduced, to the extent that site closure was requested by the client. A total of approximately $5,000 was expended for EFR®. (a978)

Client: Environmental Consulting Firm
Type of Facility: Former Bus Company Facility
Location: Tallahassee, Florida

A single EFR event was conducted at this facility at a cost of $3,580.00. Free product was completely removed and dissolved phase petroleum hydrocarbon were reduced to nondetect (ND). An NFA has been requested at the site.

Client: Environmental Consulting Firm
Type of Facility: Former Trucking Facility
Location: Orlando Area, Florida

Minimal details are revealed regarding this site due to ongoing litigation. A single eight hour EFR event was conducted at a cost of $4,498.00 which resulted in a >99% reduction in dissolved phase concentrations, according to the client.

Client: Environmental Consulting Firm
Type of Facility: Service Station
Location: Bushnell, Florida

Four EFR® events removed all measurable SPH at a site where state regulators were exerting pressure since SPH had "lingered" for many years. Total cost for EFR® was only $14,993.

Client: Major Oil Company
Type of Facility: Service Station
Location: Chickasha, Oklahoma

Only two EFR® events, conducted at a cost of $6,240 were required to remove <1.15 feet of SPH from seven monitor wells. (f9435)

Client: Power Company
Type of Facility: Power Plant
Location: Gentry, Arkansas

A single EFR® removed all measurable diesel from this site at a cost of only $3,390. Diesel SPH had existed at this site for a long period of time. (swepco)

Client: Petroleum Pipeline Co.
Type of Facility: Storage Terminal
Location: Newington, Virginia

A single EFR® event removed the measurable diesel SPH at this site at a cost of only $3,686, after which the state regulatory agency agreed to close down the investigation. (ppl)