Ill. Admin. Code tit. 35, § 734.340
a) An owner or operator may choose to use an alternative technology for corrective action in response to a release. Corrective action plans proposing the use of alternative technologies must be submitted to the Agency in accordance with Section 734.335 of this Part. In addition to the requirements for corrective action plans contained in Section 734.335, the owner or operator who seeks approval of an alternative technology must submit documentation along with the corrective action plan demonstrating that: