35 Ill. Adm. Code 734.200
General
Section 734.200 General
Owners and operators of underground storage tanks shall,
in response to all confirmed releases of petroleum, comply with all applicable
statutory and regulatory reporting and response requirements
[415 ILCS
5/57.6(a)]. No work plan or corresponding budget must be required for
conducting early action activities, excluding free product removal activities
conducted more than 45 days after confirmation of the presence of free
product.