Multi-Reactive Treatment Barrier Successfully Treats TCE Contamination.

Adventus and ARS Technologies Announce the Successful Completion of Canadian PRB Project

NEW BRUNSWICK, N.J. & TORONTO -- ARS Technologies (ARS) and The Adventus Group have announced the completion of their first joint project integrating the firms' environmental treatment technologies. The project, completed for a Canadian government agency, consisted of the installation of a pilot-scale multi-reactive treatment barrier at a facility in Quebec, Canada.

The project site is an active facility that has a TCE plume migrating to a local river. The plume is about 2.2 km (1.5 miles) long and has three large source areas and a few smaller source areas. The three source areas co-mingle to form one large plume. The geology of the site is comprised of sands and gravels over bedrock with small localized inclusions of silts and clays. Groundwater velocity is estimated at 1 to 3 feet per day. Depth to bedrock varies but is 95 to 130 feet bgs. A low permeability clay-till layer is located at about 81 feet bgs. The water table is about 30 feet bgs. TCE concentrations in the pilot test area are as high as 680 micrograms per liter, but average around 100 to 200 micrograms per liter.

The installed system will be monitored for the next 10 months as part of an ongoing technology evaluation program. The installation was implemented by ARS as part of a corrective measure study to assess the effectiveness of Pneumatic Fracturing/Liquid Atomized Injection (PF/LAI) and In-Situ Chemical Reduction (ISCR) emplacing a mixture of zero valent iron (ZVI) powder and Adventus' EHC bioremediation product (a proprietary mixture of solid organic carbon and micro-scale iron), for the treatment of chlorinated volatile organic compounds (CVOCs).

Field operations at the site were performed from June 19 through July 15, 2006. Field work began with installation of twelve injection boreholes to depths as great as 83 feet, in a 125 feet long by 25 feet wide treatment area. The reactive materials were injected by ARS Technologies' patented emplacement technology termed "Liquid Atomization Injection" (LAI) using bulk nitrogen gas to maximize the extent and uniformity of reactive medium distribution. The gas was injected at flow rates ranging from 300 to 800 scfm using a proprietary high-pressure pneumatic injection module designed to regulate the high flow rate. The gas served to drive and disperse the EHC and ZVI powder into the formation. PF/LAI may be applied by a steady stream of nitrogen or a pulsing method in response to formation characteristics at specific intervals or depths.

Injections were performed in discrete 3.5-ft intervals in order to isolate and concentrate the energy of the nitrogen for better distribution. Ten to fifteen injections were conducted in each of the twelve injection locations. Over four weeks, a total of 64,877 pounds of ZVI and 26,645 pounds of EHC material were emplaced directly in the aquifer.

"We're pleased to be to working with our partner, Adventus, here at this site," said Mike Liskowitz, ARS Project Manager. "This deep application project represents the first EHC/ZVI barrier installed using our proprietary gas atomized injection method. With the results of this project, we look forward to working with Adventus in extending the applicability of their treatment products to deeper and more complex geology sites."

David Hill, Adventus' Director of Operations, added "Through our acquisition of EnviroMetal Technologies Inc., we were certainly aware of ARS' capabilities to inject ZVI at significant depths. This demonstration confirmed the efficacy of their methods for emplacement of EHC, which will broaden the scope of subsurface environments where EHC can be used to effectively treat groundwater contamination of both CVOCs and trace metals with our EHC-M product."

About Adventus

The Adventus Group provides a growing portfolio of leading environmental remediation technologies, including patented offerings from Adventus Americas Inc., and EnviroMetal Technologies Inc. Our business model supports site owners, environmental engineers, and diverse consulting professionals by providing unbiased design, and selection of the most cost-effective remediation strategies.

Adventus exclusively offers DARAMEND[R], EHC[R] and related ZVI technologies for In Situ Chemical Reduction (ISCR) along with TERRAMEND[R], AQUABLOK+[TM], EHC-O[R], O-Sox[TM], and mGCW-R[TM] systems to address myriad soil, sediment and groundwater impacts. Our world-class technical team is a clearly recognized industry leader. Since its inception in 2003, Adventus has successfully deployed field installations at over 200 sites in North America, Europe, Asia, and Australia.

The Adventus family of companies is always seeking strategic partnerships with complementary remediation biotechnologies, and qualified international licensees in numerous countries. More information can be found online at www.AdventusGroup.com or www.eti.ca.

About ARS Technologies

ARS, founded in 1990 is the world leader in environmental soil fracturing and injection services. As a field services subcontractor, ARS focuses on applying its innovative and patented services at contaminated sites with difficult geologic conditions. With experienced crews and proprietary equipment based on both coasts at our New Jersey and California offices, we effectively service both the North American and global markets. Using exclusive and proprietary fracturing and injection processes, ARS offers solutions at sites possessing clay, silt, fill, fractured rock, fine sands, and other difficult geologic settings and offers cost-effective treatment options for our clients at sites that were previously thought untreatable. At present, our technologies are operating in three countries and more than thirty-five different states and provinces.

To learn more visit the ARS Technologies Web site at: http://www.arstechnologies.com.