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Disposal of Granular Activated Charcoal used for the Treatment of Radon-222 in Well Water.

Though not yet a major issue, the disposal of spent granular activated charcoal (GAC) filters used in the application of residential radon reduction from well water may one day become a concern. Residual radioactivity collected on the filter media, such as natural uranium, radium, and lead need to be accounted for in order to minimize problems at the disposal site. Well water is known to contain small quantities of uranium, radium, and radon, and the GAC filter has varying collection efficiencies for each. Lead, a decay product of radon will also build up on the filter. Various disposal concerns need to be considered such as, U.S. DOT transportation issues, U.S. NRC regulations, and state TENORM guidance. This paper addresses these issues, in particular as they relate to Pennsylvania.