Indiana Code Title 13. Environment § 13-11-2-239

Sec. 239. (a) “Treatment”, for purposes of environmental management laws, when used in connection with a waste that is determined to be hazardous waste under IC 13-22-2-3, means any method, technique, or process designed to change the physical, chemical, or biological character or composition of the waste so as to:

(b) “Treatment”, for purposes of IC 13-22-12, includes:

hazardous waste treatment.

(c) “Treatment”, for purposes of IC 13-29-1, means any method, technique, or process, including storage for radioactive decay, designed to change the physical, chemical, or biological characteristics or composition of any waste in order to render the waste safer for transport or management, amenable to recovery, convertible to another usable material, or reduced in volume.