Ariz. Rev. Stat. § 49-1019 – Release of regulated substance; causes of action; limitation; liability

A. Any one of the following persons may bring an action in superior court against a person who caused or contributed to the release of a regulated substance from an underground storage tank to require that person to reimburse one of the following persons for the reasonable costs of corrective actions taken in response to the release:
1. 1. An owner or operator of an underground storage tank or any other person who takes a corrective action pursuant to section 49-1005.
2. 2. An owner or operator of an underground storage tank or any other person from whom costs are recovered by this state pursuant to this chapter.
B. The person seeking reimbursement has the burden of demonstrating that the corrective action costs incurred were reasonable.
C. This article does not affect or modify the obligations or liability of a person, by reason of subrogation or otherwise, under any other provision of common law, federal law or the laws of this state, for damages, injury or loss resulting from a release of a regulated substance or for the costs of a corrective action, except that a person who receives compensation for the costs of a corrective action pursuant to this article is precluded from recovering compensation for the same corrective action costs pursuant to any other federal law or the laws of this state. A person who receives compensation for corrective action costs pursuant to federal law or the laws of this state is precluded from receiving compensation for the same corrective action costs as provided in this article.
D. Liability under this section shall be equitably allocated on a case-by-case basis in accordance with section 49-1017, subsection D. Any party authorized to bring an action pursuant to subsection A of this section and any party against whom an action is brought may have liability allocated through mediation in accordance with section 49-1017, subsection D or through the informal appeal process in accordance with section 49-1091.
E. The department may take corrective action for a release and recover direct costs pursuant to section 49-1017 in proportion to the allocation made pursuant to subsection D of this section if an owner or an operator does not perform all necessary corrective actions and there is no other person to perform corrective actions pursuant to section 49-1016, subsection C.