Ariz. Admin. Code § 18-7-501
The following definitions shall apply in this Article, unless the context otherwise requires:
"Applicant" means a person who participates in the Voluntary Remediation Program. Participation in the Voluntary Remediation Program begins when the Department receives an application under A.R.S. § 49-173 and continues until any one of the following occurs:
The Department grants the applicant's request for a no further action determination.
The applicant provides the Department with notice of the applicant's intent to withdraw from the program.
The Department terminates the applicant's participation under A.R.S. § 49-178(B).
"Department" means the Arizona Department of Environmental Quality.
"Voluntary Remediation Program" means the program authorized under A.R.S. Title 49, Chapter 1, Article 5.
Ariz. Admin. Code § R18-7-501