Exempts a person from liability for response costs (with exceptions) at a NPL facility for municipal solid waste (MSW) as a non-owner or operator if the person is an owner, operator, or lessee of residential property from which all of the person's MSW was generated, or a certain small business or small charitable tax-exempt organization that generated all its MSW, with respect to the facility concerned.
Makes nongovernmental entities that commence a contribution action liable to the defendant for all reasonable costs of defending the action if the defendant is not liable based on the above-described exemptions.
Adds to the list of parties eligible for de minimis final settlements certain persons and businesses that demonstrate an inability or limited ability to pay response costs.
Revises conditions of eligibility for such settlements for de minimis parties.