In the event the State of Illinois seeks to require a person who may be liable pursuant to the Act to conduct a response for a release or threatened release of a regulated substance, the Agency shall provide notice to such person. Such notice shall include the necessity to conduct a response pursuant to Title XVII of the Act and an opportunity for the person to perform the response. (Section 58.9(b) of the Act)
Ill. Admin. Code tit. 35, § 741.120