Indiana Code Title 13. Environment § 13-24-1-4

Sec. 4. (a) Except where an owner or operator can prove that a release from a petroleum facility was caused by:

the owner or operator is liable to the state for the reasonable costs of any response or remedial action taken under section 2 of this chapter involving the petroleum facility. A responsible person is liable to the state for the reasonable costs of any response or remedial action taken under section 2 of this chapter involving the petroleum facility.

(b) The owner, operator, or responsible person is entitled to all rights of the state to recover from another responsible person all or a part of the costs described in subsection (a) incurred or paid to the state by the owner, operator, or responsible person in an action brought in a circuit or superior court with jurisdiction in the county in which the release occurred.

(c) Money recovered by the state under this section in connection with a removal or remedial action undertaken with respect to a release of petroleum shall be deposited in the hazardous substances response trust fund.

(d) The state may recover removal or remedial action costs under this section as follows:

(e) In an administrative action brought under this chapter, an environmental law judge shall apportion the costs of a response or a remedial action in proportion to each party's responsibility for a release.