- (a) For purposes of this Section, "induced seismicity" means an earthquake event that is felt, recorded by the national seismic network, and attributable to a Class II injection well used for disposal of flowback and produced fluid from hydraulic fracturing operations.
- (b) The Department shall adopt rules, in consultation with the Illinois State Geological Survey, establishing a protocol for controlling operational activity of Class II injection wells in an instance of induced seismicity.
- (c) The rules adopted by the Department under this Section shall employ a "traffic light" control system allowing for low levels of seismicity while including additional monitoring and mitigation requirements when seismic events are of sufficient intensity to result in a concern for public health and safety.
- (d) The additional mitigation requirements referenced in subsection (c) of this Section shall provide for either the scaling back of injection operations with monitoring for establishment of a potentially safe operation level or the immediate cessation of injection operations.
(Source: P.A. 98-22, eff. 6-17-13; 99-78, eff. 7-20-15.)