Adventus Group's Biotechnology Selected for Treatment of PCP-impacted Soil.

MISSISSAUGA, Ontario -- Patented DARAMEND(R) Technology Produced Mean Concentration Reductions of More Than 95 Percent

Adventus Remediation Technologies Inc. (ART) and their USA subsidiary; Adventus Americas Inc. (AAI), have announced the selection of DARAMEND(R) to remediate approximately 6,000 tons of soil impacted with pentachlorophenol (PCP) at a former manufacturing facility located in America's Pacific Northwest. Prior to 2005 DARAMEND(R) had been successfully used to remediate 12,000 tons of similarly impacted soils at the same site over a period of 4 years.

"We conducted testing on a variety of treatment technologies for the soils at this site, and found DARAMEND to be the best choice," stated John Oldham, Director/Site Remediation with Reichhold Inc. "The performance and cost of the technology have met our expectations to date."

Dr. Alan Seech, president of ART, offered that "The Adventus Group continues to demonstrate the powerful capabilities of this innovative remediation biotechnology. We offer the industry's only performance guarantee for soil remediation of this type. To date, DARAMEND technology has been successfully applied to more than 600,000 tons of soil, sediment, and other wastes contaminated with polycyclic aromatic hydrocarbons (PAHs), PCP, phthalates, chlorinated herbicides and pesticides, organic explosive compounds and wood preservatives at a variety of industrial and military sites in the United States and around the world."

The Process

The methodology was representative of multiple sites ART has successfully treated over the past 15 years. In prior years PCP impacted soils from landfill excavations at the Reichhold site were placed in lined bioremediation cells allowing access to two-foot soils layers for DARAMEND treatment. As an example in one cell initial concentrations of PCP ranged from 25 mg/kg to 2,890 mg/kg with a mean PCP concentration of 776 mg/kg. The objective was to reduce the concentration of PCP to less than 50 mg/kg throughout the treatment area.

DARAMEND was applied using a site-specific aerobic protocol that utilized indigenous microorganisms. The technology involved the addition of ARTs proprietary organic amendments and site-specific nutrient supplements designed to optimize the rate of microbial activity in the soil. The soil moisture content was then maintained at a relatively constant level (approximately 60% of the soil water holding capacity). The soil was tilled periodically to maintain aerobic soil conditions. Tilling was accomplished using a tractor mounted specialized deep rotary tiller with the capacity to till a depth of 2 feet.

PCP concentrations in heavily impacted areas of the treatment cell were reduced from as high as 2,890 mg/kg to 11 mg/kg. The mean PCP concentration was reduced from 776 mg/kg to 38 mg/kg over two years during which there was approximately 10 months of active biotreatment. The remedial goal of less than 50 mg/kg was met and surpassed in all but one sampling zone. The cost to apply DARAMEND at this site was approximately $40/ton; not including the cost of the significant portion of the site work which was conducted by the site owner.

The Technology

DARAMEND is an advanced biological treatment technology for soil, sediment, and solid wastes contaminated with recalcitrant organic compounds. Independent audits conducted by the US EPA and Environment Canada found DARAMEND to be effective for the treatment of soils at wood preserving sites. DARAMEND has been successfully applied to soils containing organic explosive compounds at US Navy and Army sites in Virginia, Iowa, New Jersey, Nevada, and Illinois. The technology is uniquely advantageous because it can often be applied without excavation and generates no odors. The use of DARAMEND can result in substantial cost savings and shorter remediation schedules compared to traditional bioremediation processes.

About The Adventus Group

Adventus Americas Inc. (AAI) is an environmental services company that provides various remediation biotechnologies including those exclusive to our sister companies, Adventus Remediation Technologies, Inc. (ART) and EnviroMetal Technologies, Inc. (ETI). The groups' proprietary technologies include DARAMEND(R) and TERRAMEND(TM) for treatment of soil and sediment, AQUAMEND(R) for wastewater, and EHC(TM) technologies and mGCW systems for in situ groundwater treatment. ETI is the world leader in applications of permeable reactive barrier (PRB) technology for the remediation of contaminated groundwater, with experience at over 125 sites in United States, Canada, Europe, Japan and Australia. Both EHC and DARAMEND are the subjects of numerous patents.

The Adventus network includes field offices in Colorado, Connecticut, Illinois, New Jersey, and Ontario, Canada, including an expanding network of international licensees. Licensee inquiries are welcome. For more information on The Adventus Group, call [phone] or visit the company's Web sites at www.adventus.us or http://www.eti.ca

DARAMEND is a registered Trademark of Adventus Intellectual Property Inc.