Superfund Amendments of 1984

[AI summary unavailable — showing source text] Superfund Amendments of 1984 - Amends the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) (Superfund) to add a definition of "underground storage tank." Revises the definition of "hazardous substance" to include any petroleum substance contained in an underground storage tank. Excludes from specified liability provisions persons who have sold or delivered a petroleum product intended for resale or use which is subsequently stored in an underground storage tank. Provides for cost recovery for responses to releases of pollutants or contaminants by adding the terms "pollutants or contaminants" to specified references to hazardous substances under liability provisions. Requires listing of pollutants or contaminants as hazardous substances under specified conditions. Directs the Administrator of the Environmental Protection Agency (the EPA Administrator), within one year after the initiation of response to a release or threat of release of a pollutant or contaminant which may present an imminent and substantial danger to the public health or welfare, to decide whether to designate such pollutant or contaminant as a hazardous substance. Directs the …