Ariz. Rev. Stat. § 49-287
B. This section does not preclude the director from initiating actions pursuant to section 505 of the clean water act and section 1449 of the safe drinking water act. The director shall not initiate any action under section 107(a) or 107(f) of CERCLA or section 7002 of the resource conservation and recovery act to the extent that the action is inconsistent with this article, except under any of the following circumstances:
E. If there is a release or the threat of a release of a hazardous substance which may present an imminent and substantial danger to the public health or welfare or the environment:
3. The director may issue an order requiring abatement of such release or threat of a release and appropriate remedial action if the action is consistent with the criteria listed in and rules adopted pursuant to section 49-282.06 and before taking such action the director provides written notice to the responsible party, if known, and the owner of the real property where the facility is located if the owner is not a responsible party. The notice shall include: