Mont. Code § 75-10-407
If it is determined that an application for a certificate under the Montana Major Facility Siting Act, Title 75, chapter 20, will result in the generation, transportation, storage, or disposal of hazardous wastes as defined in 75-10-403, the department shall conduct its review under the provisions of this part concurrently with the studies of air and water quality conducted under the provisions of the Montana Major Facility Siting Act. A decision to grant or deny a permit for the treatment, storage, or disposal of hazardous wastes under the provisions of 75-10-406 is appealable concurrently with and subject to the same procedures established for the appeal of the department's air and water quality certification decision under the Montana Major Facility Siting Act. If the initial permit has been granted as specified in this section, all renewals or modifications of a permit or enforcement actions concerning alleged violations of the permit and the provisions of this part shall be conducted pursuant to the procedures and enforcement provisions established in this part.
§ 75-10-407, MCA