Indiana Code Title 13. Environment § 13-24-1-2

Sec. 2. (a) Except as provided in subsection (c), the commissioner may undertake removal or remedial action with respect to a release of petroleum at a petroleum facility if:

(b) In undertaking removal or remedial action under subsection (a), the commissioner shall give priority to releases of petroleum from a petroleum facility that pose the greatest threat to human health and the environment.

(c) The commissioner may undertake or require removal or remedial action with respect to a release of petroleum into the environment if it is determined that an emergency exists under IC 4-21.5-4.