(2) Pose a substantial present or potential hazard to human health or safety or to the environment when improperly stored, treated, transported, disposed of, or otherwise managed.
"Hazardous waste" includes any substance identified by regulation as hazardous waste under the "Resource Conservation and Recovery Act of 1976," 90 Stat. 2806, 42 U.S.C.A. 6921, as amended, and does not include any substance that is subject to the "Atomic Energy Act of 1954," 68 Stat. 919, 42 U.S.C.A. 2011, as amended.