Ill. Admin. Code tit. 35, § 616.447 - Closure and Post-Closure Care
a) If closure is to be by removal, the owner
or operator must remove all waste, all waste residues, contaminated containment
system components (e.g., liners), contaminated subsoils and structures and
equipment contaminated with waste and leachate; and, if disposed of in the
State of Illinois, dispose of them at a disposal site permitted by the Agency
under the Act.
b) If closure is not
to be by removal, the owner or operator must comply with the requirements of
Subpart C and must:
1) Eliminate free liquids
by removing liquid wastes or solidifying the remaining wastes and waste
residues.
2) Stabilize remaining
wastes to a bearing capacity sufficient to support final cover.
3) Cover the surface impoundment unit with a
final cover designed and constructed to:
A)
Provide long-term minimization of the migration of liquids through the closed
impoundment unit;
B) Function with
minimum maintenance;
C) Promote
drainage and minimize erosion or abrasion of the final cover;
D) Accommodate settling and subsidence so
that the cover's integrity is maintained; and
E) Have a permeability less than or equal to
the permeability of any bottom liner system.
c) If some waste residues or contaminated
materials are left in place at final closure, the owner or operator must comply
with the requirements of Subpart C for five years after closure and must:
1) Maintain the integrity and effectiveness
of the final cover, including making repairs to the cap as necessary to correct
the effects of settling, subsidence, erosion, or other events;
2) Maintain and monitor the groundwater
monitoring system; and
3) Prevent
run-on and run-off from eroding or otherwise damaging the final
cover.
Notes
Amended at 21 Ill. Reg. 6543, effective May 8, 1997
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