Mont. Code Ann. § 75-10-601

The legislature finds that the existence of hazardous substances and contaminants in the environment and hazardous waste disposal sites poses a significant health hazard through potential and actual contamination of the environment. This part is therefore enacted to protect the public health, safety, and welfare through cooperation with the federal government under the federal Comprehensive Environmental Response, Compensation, and Liability Act of 1980 to provide for the disposal and control of such hazardous substances and contaminants in a safe and environmentally sound manner.