Groundwater monitoring and incinerator ash : hearing before the Subcommittee on Transportation and Hazardous Materials of the Committee on Energy and Commerce, House of Representatives, One Hundred Third Congress, second session, on H.R. 2654, a bill to authorize the Administrator of the Environmental Protection Agency to exempt certain small landfills ... July 27, 1994. (U.S. G.P.O. :, 1994)