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NEW LEAD RECOVERY SYSTEM SUCCEEDS AT ARMY AMMUNITION PLANT

 WASHINGTON, Oct. 19 /PRNewswire/ -- In an environmental first, COGNIS, Inc. today announced that its TerraMet(TM) process has successfully extracted lead from soil at the Twin Cities Army Ammunition Plant (TCAAP) in New Brighton, Minn.
 "Soil contaminated with lead is one of the most common heavy metal waste problems in the United States," said Dr. William Fristad, manager of the TerraMet project at TCAAP. The toxic effects of lead are widespread and can be found everywhere from wildlife to inner city children. "Previous treatment options, however, have been limited to solidification and landfilling -- both of which are costly, temporary solutions," said Fristad.
 The TCAAP site, which was designated as Minnesota's No. 1 Superfund site, had been used by the Army to burn scrap ammunition and powder and to bury scrap casings. The ash and residue from burning were spread over the surface, and casings were placed in a trench.
 The clean-up of the site is the first successful example of on-site lead recovery from soil. After soil excavation, soil washing is done using a system developed and built by Bescorp (Fairbanks, Alaska). The Bescorp soil washing system removes the discrete lead fragments. The sand and fine mesh soil fractions are then sent to the TerraMet unit where heavy metals are extracted using a proprietary leach solution. Finally, the metals are removed from the leach liquor and returned to a smelter for recycling. The clean-up process allows all soil to be returned to the site and all the lead contaminant is recycled.
 With the TerraMet operation, lead has been reduced from levels as high as 86,000 ppm to below a level of 175 ppm at TCAAP. The clean-up standard for this project set by the Minnesota Pollution Control Agency is 300 ppm. The TCAAP project involves clean up of 5,000 yards of soil at a cost of $2.4 million. Six weeks will be required for completion.
 "Two years ago, COGNIS identified lead as public enemy number one, based on the U.S. Environmental Protection Agency's declaration that it was their top priority pollutant," said Dr. Ken MacKay, COGNIS president and CEO. "Today, we are in a position to move our mobile units into contaminated areas and quickly clean them up." The TerraMet processing equipment is conveniently moved to contaminated sites on flatbed truck trailers.
 COGNIS, Inc. is an environmental technology company providing clients with technically sound and cost-effective solutions to environmental problems. COGNIS is part of the $9 billion international Henkel Group, which employs 41,000 people in some 200 companies in more than 50 countries. COGNIS is located in both Santa Rosa, Calif., and Dusseldorf, Germany. COGNIS provides services in metal recovery, bioremediation, analytical technology, and engineering services.
 Further information on TerraMet or inquiries about other COGNIS services can be obtained by calling Carol Sullivan at 800-524-3307, or faxing 707-575-7833.
 /delval/
 -0- 10/18/93
 /CONTACT: Carol Sullivan of COGNIS, 800-524-3307/


CO: COGNIS, Inc.; U.S. Army; Henkel Group

ST: District of Columbia; Minnesota IN: ENV CHM SU:

JM-LJ -- PH013 -- 3842 10/19/93 10:16 EDT
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Publication:PR Newswire
Date:Oct 19, 1993
Words:510
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