32 Ill. Adm. Code 601.330
Post-Closure Observation and Maintenance
Section 601.330 Post-Closure Observation and Maintenance
The licensee shall observe, monitor, carry out maintenance
and repairs, and maintain security at the disposal site for a minimum period of
10 years following site closure and until the license is terminated by the
Agency. The licensee shall maintain a monitoring system based on past
monitoring performance and the closure and stabilization of the disposal site.
The monitoring system must be capable of providing early warning of releases of
radionuclides from disposal units before they leave the site boundary. A
longer time period for post-closure observation and maintenance may be required
as part of the site closure plan, based upon site-specific conditions.