To amend the Emergency Planning and Community Right-to-Know Act of 1986 and the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 to modify certain notice requirements, and for other purposes.

[AI summary unavailable — showing source text] (Sec. 1) Amends the Emergency Planning and Community Right-to-Know Act of 1986 to modify notice requirements regarding releases of extremely hazardous substances (or releases of other substances subject to Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) notification requirements) to require notification by the owner or operator of the facility at which the chemical is produced, used, or stored to emergency planning officials within one hour of having knowledge (under current law, "immediately") that a release has occurred. Permits an exception to the one hour requirement in the event of unusual or extenuating circumstances. Allows such notice to be given (in addition to the community emergency coordinator and State emergency planning commission, as under current law) to a State agency authorized by State law to receive the notification and requires such an agency to then notify the State emergency response commission within two hours. (Sec. 2) Amends CERCLA to modify notice requirements regarding releases of hazardous substances to require notification by the person in charge of the vessel or facility within one hour of having knowledge of the…