Ind. Code § 13-22-13-2

Sec. 2. Under section 1 of this chapter, the commissioner or a court may order the performance of corrective action beyond the boundaries of the facility from which the release occurs. However, the commissioner may not order corrective action beyond the boundaries of the facility if the owner or operator of the facility demonstrates to the satisfaction of the commissioner that, despite the best efforts of the owner or operator, the owner or operator is unable to obtain the necessary permission to undertake the corrective action.