35 Ill. Adm. Code 845.660
Assessment of Corrective Measures
Section 845.660 Assessment of
Corrective Measures
a) Unless
the Agency has concurred with an alternative source demonstration made under
Section 845.650(e), the owner or operator must initiate an assessment of
corrective measures to prevent further releases, to remediate any releases, and
to restore the affected area.
1) The
assessment of corrective measures must be initiated
within 90 days after finding that any
constituent listed in Section 845.600 has been detected in exceedance of the groundwater
protection standards in Section 845.600, at the downgradient waste boundary or
immediately upon detection of a release of CCR from a CCR surface impoundment.
2) The
assessment of corrective measures must be completed and submitted to the Agency
within 90 days after initiation of assessment of corrective measures, unless
the owner or operator demonstrates to the Agency the need for additional time
to complete the assessment of corrective measures due to site-specific
conditions or circumstances. The owner or operator must submit this
demonstration, along with a certification from a qualified professional
engineer attesting that the demonstration is accurate, to the Agency within 60
days after initiating an assessment of corrective measures. The Agency must
either approve or disapprove the demonstration within 30 days. The 90-day
deadline to complete the assessment of corrective measures may be extended for
no longer than 60 days. The owner or operator must also include the Agency
approved demonstration in the annual groundwater monitoring and corrective
action report required by Section 845.610(e), in addition to the certification
by a qualified professional engineer.
b) The
owner or operator of the CCR surface impoundment must continue to monitor
groundwater in accordance with the monitoring program as specified in Section
845.650.
c) The
assessment under subsection (a) must include an analysis of the effectiveness
of potential corrective measures in meeting all the requirements and objectives
of the corrective action plan, as described by Section 845.670, addressing at
least the following:
1) The
performance, reliability, ease of implementation, and potential impacts of
appropriate potential remedies, including safety impacts, cross-media impacts,
and control of exposure to any residual contamination;
2) The
time required to begin and complete the corrective action plan; and
3) The
institutional requirements, such as State or local permit requirements or other
environmental or public health requirements that may substantially affect
implementation of the corrective action plan.
d)
The owner or operator of the CCR
surface impoundment must discuss the results of the corrective measures
assessment, at least 30 days before the selection of remedy, in a public
meeting with interested and affected parties (see Section 845.240).
e) When the owner or operator of a CCR surface
impoundment is completing closure and corrective action simultaneously, the
owner or operator may combine the corrective measures assessment required by
this Section and the closure alternatives analysis required by Section 845.710
into one assessment of alternatives.