35 Ill. Adm. Code 310.403
Imminent Endangerment
Section 310
Section 310.403Â Imminent
Endangerment
Under Section 34 of the Act [415
ILCS 5/34] the Agency must declare an emergency and seal any wastewater source
or discharge if it determines that the discharge presents an imminent
endangerment to the health or welfare of persons.