Ariz. Rev. Stat. § 49-283
A. For the purposes of imposing liability under this article, and except as provided in this section, a person is deemed the party responsible for the release or threatened release of a hazardous substance if the person:
1. Owned or operated the facility:
B. Notwithstanding subsection A of this section, a person that owns real property is not a responsible party if there is a release or threatened release of a hazardous substance from a facility in or on the property unless one or more of the following applies to that person:
D. A person otherwise deemed a responsible party is not liable under this article if the person can establish by a preponderance of the evidence that the release or threat of release of a hazardous substance and the resulting damages were caused solely by:
3. An act or omission of a third party, whether lawful or unlawful, including acts of vandalism or unlawful disposal of hazardous waste or hazardous substances, other than an employee or agent of that person or other than one whose act or omission occurs in connection with a contractual relationship, existing directly or indirectly, with that person, unless the sole contractual arrangement arises from a published tariff and acceptance for carriage by a common carrier by rail, if that person establishes by a preponderance of the evidence that:
H. A person who maintains indicia of ownership in a property primarily to protect a security interest in a facility and who does not participate in the management of the facility is not liable as an owner or operator of that facility pursuant to this section. This subsection does not apply to a person who does any of the following:
4. Fails to do any of the following after acquiring ownership of the facility:
I. A fiduciary is not personally liable as an owner or operator pursuant to this section. This section does not preclude claims against assets held in an estate, a trust or other fiduciary capacity for the release or a threatened release of a hazardous substance from one of the assets. This section does not apply if either of the following applies:
O. The owner of a qualifying property shall provide written notice to:
2. The director:
3. The state mine inspector if the site is a mine or abandoned mine as defined in section 27-301:
P. For the purposes of this section:
1. "Fiduciary" means:
4. "Qualifying property" means property where there has been a release or threatened release of a hazardous substance that is known to the owner of the property, the owner is a responsible party as prescribed in this section and the property meets either of the following classifications: