A.R.S. § 49-296

A settlement agreement made pursuant to this article may provide that the director shall reimburse a party to the agreement from the fund for the costs of specific remedial actions that the party has agreed to perform. In appropriate cases, the director may make reasonable efforts pursuant to this article to recover any fund expenditures from responsible parties who are not involved in the settlement agreement. A decision by the director not to reimburse a party from the fund for the costs of conducting a remedial action that is contained in a settlement agreement is not subject to judicial review.