Indiana Code Title 5. State and Local Administration § 5-1.2-2-65

(1) Actions necessary to:

damages to the public health or welfare or to the environment that may otherwise result from a release or threat of a release of hazardous substances or petroleum.

(2) Actions consistent with a permanent remedy taken instead of or in addition to removal actions if a release or threatened release of a hazardous substance or petroleum into the environment occurs to eliminate the release of hazardous substances or petroleum so that the hazardous substances or petroleum do not migrate to cause substantial danger to present or future public health or welfare or the environment.

(3) The clean-up or removal of released hazardous substances or petroleum from the environment.