Project Summary - Page 7

Client: Major Oil Company
Type of Facility: Service Station
Location: Columbus, Georgia

Free product had persisted at two service station sites in south Georgia for a long period of time. The objective at the sites was to remove free product (as much as 0.25 to 0.55 feet was present), as well as to reduce dissolved phase petroleum hydrocarbon concentrations, in an effort to move the site towards risk based closure. Measurable free product was removed from both sites after a total of six EFR® events at a total cost of approximately $17,172 for both sites. (91012/3)

Client: Major Oil Company
Type of Facility: Service Station
Location: Birmingham, Alabama

EFR® was implemented at an active service station site as an immediate response action due to nuisance gasoline odors present in an adjacent fast food restaurant. EcoVac Services was mobilized to the site the day following the initial contact by the client, inclusive of negotiating a first time contract with this major oil company. The site conditions did not qualify it as an ideal candidate due to a shallow water table (1 to 6 feet below ground surface), known manmade subsurface conduits, and a land surface partially lacking an impervious cover. Nearly 2,000 pounds of petroleum hydrocarbons (an estimated 310 equivalent gallons of gasoline) were recovered during the initial eight hour EFR® event and EcoVac Services personnel were successful in determining the conduit for the nuisance odors present at the adjacent restaurant (i.e. a breach in a sanitary sewer line that serviced the restaurant). The amount of free product was significantly reduced after the initial EFR® event in terms of the thickness of free product, as well as the number of wells which contained free product. A second event of EFR® was performed ten days later, after which an interim (fixed) remediation system was installed. (24292)

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

As much as 2.5 feet of product was detected in four monitor points at a former service station. The monitor wells used for extraction were located at, and downgradient to, the former UST area. Four EFR® events were conducted over a 16 month period at a cost of $11,350. Product was absent prior to the fourth event, however, a climatic rise in the water table may have contributed to the absence of product. (23578)

Client: Environmental Consulting Firm
Type of Facility: Casino/Restaurant (Former Service Station)
Location: Latta, South Carolina

Over 2 feet of free phase gasoline existed at a former petroleum UST site, which had been converted to a gambling facility. Despite shallow groundwater conditions (2.5 to 6 feet below surface), the product was completely removed following a single eight hour EFR® event at a cost of only $3,495.

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

Two EFR® events were conducted at a former service station site to address a sheen of product and dissolved phase petroleum hydrocarbons, at a cost of $5,750. The sheen was removed and dissolved phase TPH GRO/DRO and benzene were reduced by a minimum of 50% to as much as nondetect (ND) levels. (24362)

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

EFR® was implemented at an active service station, under which a free product plume existed entirely across the site at a thickness as much as 1.9 feet of product. EFR® was conducted at night and involved placing hoses over the top of the car wash (to allow access to one of the extraction wells), so as to minimize interruption to customer fueling and service bay operations. Approximately 3,000 pounds of petroleum hydrocarbons (500 equivalent gallons of gasoline) were removed during the four EFR® events conducted over a period of 14 months. Product was not present prior to the fifth EFR® event and a total of $13,400 was expended for these EFR® treatments.

Client: Major Oil Company
Type of Facility: Service Station
Location: Ypsilanti, Michigan

EFR® was implemented for four events (total of 24 hours of extraction) at a site at which four monitor wells contained as much as 2.3 feet of free product. Offgas concentrations exceeding 100,000 ppm were recorded during the initial 18 hours of extraction. An estimated total of 3,040 pounds of petroleum hydrocarbons (approximately 550 equivalent gallons of gasoline) was removed at a total cost of $6,416. (2368)

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

As much as 1.3 feet of product was present in eight monitor wells entirely across a site (the monitor wells with product were as much as 110 feet by 100 feet apart) that is now a family style restaurant. Ten EFR® events were conducted over a 32 month time period at a cost of $26,339, during which 12,304 pounds of petroleum hydrocarbons (over 2,038 equivalent gallons of gasoline) were removed. Free product was absent after the ninth event. (24431)

Client: National Environmental Consulting Firm
Type of Facility: Snack Food Distribution
Location: Chamblee, Georgia

As much as 6 feet of a diesel and gasoline free product mixture existed in 4 monitor wells. EFR® was implemented utilizing offgas control, consisting of trailer mounted dual internal combustion engines (ICEs). A total of 443 equivalent gallons of gasoline/diesel were removed during the initial EFR® event, and a 99.99% vapor emission destruction efficiency was achieved by the ICEs. Four subsequent eight hour EFR® events were conducted. A total of over 1,500 equivalent gallons of gasoline/diesel have been removed at a cost of $20,562, including the cost of offgas treatment. (F-L)

Client: Environmental Consulting Firm
Type of Facility: Active Truck Stop/Service Station
Location: Doraville, Georgia

EFR® was implemented at a site impacted by diesel, which was present in four tankpit wells at a thickness of ~0.25 feet. An estimated total 1,400 gallons of diesel were removed during two 8-hour EFR® event at a cost of $8,130, inclusive of the cost to dispose of free product and groundwater. Treatment of the offgases was achieved through the use of a computer controlled dual internal combustion engine (ICE). A total of only 0.26 pound of VOCs was emitted during the two events. (qt)