Project Summary - Page 4

Client: National Environmental Consulting Firm
Type of Facility: Service Stations
Location: Chattanooga, Tennessee

Separate phase kerosene and degraded gasoline existed at two different active gasoline stations owned by a major oil company. A total of nine and five 8-hour EFR® events were conducted at the kerosene and gasoline free product sites, respectively, at a total cost of $39,153 for both sites. Although only 0.20 to 0.25 feet of product existed at the site, the low mobility of the kerosene and degraded gasoline posed a challenge. Free product was successfully removed from both sites. (c42075/90)

Client: Environmental Consulting Firm
Type of Facility: Petroleum Bulk Storage Facility
Location: Bainbridge, Georgia

Dissolved phase petroleum hydrocarbon concentrations existed in a UST tankfield where free product is believed to have previously existed. A total of 12 monitor wells were utilized as extraction wells during a single eight hour EFR® event, conducted at a cost of $3,441. The dissolved phase contamination was successfully removed following the single treatment, after which the USTs were excavated. The site subsequently received closure.

Client: Major Oil Company
Type of Facility: Former Service Station
Location: Battle Creek, Michigan

A single EFR® event was conducted at a closed service station site where two monitor wells contained 0.37 to 0.45 feet of product. Approximately 213 equivalent gallons of gasoline were removed and product was not present in the monitor wells during subsequent gauging events. The cost to implement EFR® was $2,456, including product and groundwater disposal. (e6316)

Client: Major Oil Company
Type of Facility: Service Station
Location: Waynesville, North Carolina

A single eight hour EFR® event was conducted at an active service station site as an emergency response action. A release of approximately 2,000 gallons of unleaded gasoline via an overfill/overspill was documented. Approximately 1,000 gallons were removed prior to implementation of EFR®. Offgas concentration exceeded 100,000 ppm during the initial five hours of the event and an estimated 998 equivalent gallons of gasoline were removed at a total cost of $3,272, inclusive of the cost to dispose of product and groundwater. (e8134)

Client: Environmental Consulting Firm
Type of Facility: Convenience Store
Location: Acworth, Georgia

A pump and treat system was previously installed at this site at a total cost of >$200,000, which reportedly recovered only ~200 gallons of gasoline. Over 3 feet of product persisted onsite and >1.5 feet of product existed offsite (across a highway) near a creek. Five 8 hour EFR® events have been implemented at the site utilizing offgas treatment. A calculated total of 203 gallons of product have been removed at a total cost of $14,822. Product in the onsite well (which has been subjected to three of the five EFR® events) has been reduced from 3.31 feet to 0.06 feet and in the offsite well (two EFR® events) from 1.65 feet to 0.19 feet.

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

As much as 1.8 feet of SPH existed at this site in three monitor wells, which was reduced to 0.00 feet after eight EFR® events performed at a cost of $18,941. (bp 24365/ck 34202)

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

Six monitor wells contained as much as nearly 4 feet of SPH, which was completely removed after eleven EFR® events. Cost for EFR® was $24,111. (total 2260)

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

As much as 6 feet of SPH was contained in two monitor wells. Nine EFR® events were conducted at a cost of $20,888, which removed all measurable SPH. (ATC-rogers)

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

Only three EFR® events, performed at a cost of $7,677, were required to remove as much as 8 feet of SPH that existed in two monitor wells. (handex-DM411)

Client: Environmental Consulting Firm
Type of Facility: Trucking Facility
Location: Jacksonville, Florida

A single EFR event was conducted at this facility at a cost of $4,104.00. Dissolved phase petroleum hydrocarbons were reduced by as much as to nondetect (ND).

Client: National Environmental Consulting Firm
Type of Facility: Airport Rental Car Facility
Location: Memphis, Tennessee

EcoVac Services was retained by a national environmental consulting firm to remove free product at an airport car rental facility. As much as 1.27 feet of free product has existed in two monitor wells. Free product was removed after seven EFR® events performed at a cost of $24,017. EFR® has been continued at the site due to the high VOC offgas concentrations (>100,000 ppm) so as to further reduce adsorbed and dissolved phase concentrations in the soil and groundwater.

Client: Environmental Consulting Firm
Type of Facility: Fire Station
Location: Lansing, Michigan

Four EFR® events were conducted at an active fire station site containing elevated dissolved phase BTEX. Benzene was reduced from 2,000 ppb to 100 ppb; toluene from 3,900 ppb to 53 ppb; ethyl benzene from 2,400 ppb to 550 ppb; and total xylenes from 4,000 ppb to 1,600 ppb. EFR® cost was $13,249.