Sec. 68. "Environmental audit", for purposes of IC 13-28-4, means a voluntary, an internal, and a comprehensive evaluation of:
(1) a facility or an activity at a facility regulated under:
(A) this title;
(B) a rule or standard adopted under this title;
(C) any determination, permit, or order made or issued by the commissioner under this title; or
(D) federal law; or
(2) management systems related to a facility or an activity;
that is designed to identify and prevent noncompliance with laws and improve compliance with laws, and that is conducted by an owner or operator of a facility or is an activity by an employee of the owner or operator or by an independent contractor.