A granular activated carbon system developed by Calgon Corp., is being used to remove various toxic materials from contaminated groundwater at the U.S. Army's huge Rocky Mountain Arsenal near Denver, Colo. The pilot containment/treatment project, which went into full operation in late August, 1978, has been described as one of the largest efforts in the world to treat contaminated groundwater. It consists of a 1,500-foot-long underground water barrier placed along a portion of the north boundary of the 17,000-acre arsenal reserve. The barrier blocks a large share of the natural groundwater flow out of the arsenal in a shallow water table measuring less than 30' in most places.
Contaminated Groundwater Cleaned by Granular Carbon System