Except as otherwise provided in this section, the Secretary of Defense may not permit the use of an installation of the Department of Defense for the storage, treatment, or disposal of any material that is a toxic or hazardous material and that is not owned either by the Department of Defense or by a member of the armed forces (or a dependent of the member) assigned to or provided military housing on the installation.

The Secretary of Defense shall define by regulation what materials are hazardous or toxic materials for the purposes of this section, including specification of the quantity of a material that serves to make it hazardous or toxic for the purposes of this section. The definition shall include materials referred to in section 101(14) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (42 U.S.C. 9601(14)) and materials designated under section 102 of that Act (42 U.S.C. 9602) and shall include materials that are of an explosive, flammable, or pyrotechnic nature.

The storage, treatment, or disposal of materials that will be or have been used in connection with an activity of the Department of Defense or in connection with a service to be performed on an installation of the Department for the benefit of the Department.

The storage of strategic and critical materials in the National Defense Stockpile under an agreement for such storage with the Administrator of General Services.

The temporary storage or disposal of explosives in order to protect the public or to assist agencies responsible for Federal, State, or local law enforcement in storing or disposing of explosives when no alternative solution is available, if such storage or disposal is made in accordance with an agreement between the Secretary of Defense and the head of the Federal, State, or local agency concerned.

The temporary storage or disposal of explosives in order to provide emergency lifesaving assistance to civil authorities.

The disposal of excess explosives produced under a Department of Defense contract, if the head of the military department concerned determines, in each case, that an alternative feasible means of disposal is not available to the contractor, taking into consideration public safety, available resources of the contractor, and national defense production requirements.

The temporary storage of nuclear materials or nonnuclear classified materials in accordance with an agreement with the Secretary of Energy.

The storage of materials that constitute military resources intended to be used during peacetime civil emergencies in accordance with applicable Department of Defense regulations.

The temporary storage of materials of other Federal agencies in order to provide assistance and refuge for commercial carriers of such material during a transportation emergency.

The storage of any material that is not owned by the Department of Defense if the Secretary of the military department concerned determines that the material is required or generated in connection with the authorized and compatible use of a facility of the Department of Defense, including the use of such a facility for testing material or training personnel.

The storage of any material that is not owned by the Department of Defense if the Secretary of the military department concerned determines that the material is required or generated in connection with the use of a space launch facility located on an installation of the Department of Defense or on other land controlled by the United States.

The Secretary may assess a charge for any storage or disposal provided under this section. Any such charge shall be on a reimbursable cost basis.

In the case of storage under this section authorized because of an imminent danger, the storage provided shall be temporary and shall cease once the imminent danger no longer exists. In all other cases of storage or disposal authorized under this section, the storage or disposal authorized shall be terminated as determined by the Secretary.