From: | Lenny Siegel <lsiegel@igc.org> |
Date: | Mon, 07 Nov 1994 20:32:53 -0800 (PST) |
Reply: | cpeo-military |
Subject: | Re: Environmental Technology |
CASTLE AFB TREATMENT CHOICE Castle Air Force Base, near Merced in California's Central Valley, is a "Superfund" National Priorities List site undergoing closure. The base's latest environmental newsletter reports that the Air Force, EPA, and Cal-EPA have agreed to change treatment technologies for groundwater contaminated with TCE (trichloroethylene). When pumped to the surface, the water will be run through granular activated carbon filters, instead of air strippers as previously planned. The newsletter reports, "'New data shows lower contaminant levels than previously anticipated,' said Brad Hicks, [Air Force] remedial project manager.... 'That makes carbon adsorption more cost effective than air stripping while being equally protective of human health and the environment.' "Another cost savings comes from the base already having four granular activated carbon (GAC) vessels previously used at other cleanup sites on the base. "'Aside from the cost issue, GAC technology is simpler than air stripping and can be more efficient,' said Hicks. 'With a GAC system, we don't have to contend with treating air emissions like we do from an air stripper. It's strictly a liquid system.'" This is a good example how a strong regulatory framework - in this case, air quality rules that restrict emissions from cleanup equipment - can make the more environmentally sound remedy the more cost effective remedy. | |
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