Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 725 - INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
Subpart K - SURFACE IMPOUNDMENTS
Section 725.328 - Closure and Post-Closure Care
Universal Citation: 35 IL Admin Code ยง 725.328
Current through Register Vol. 48, No. 38, September 20, 2024
a) At closure, the owner or operator must do either of the following:
1) Remove or decontaminate all waste
residues, contaminated containment system components (liners, etc.),
contaminated subsoils, and structures and equipment contaminated with waste or
leachate and manage them as hazardous waste, unless 35 Ill. Adm. Code
721.103(d)
applies; or
2) Close the
impoundment and provide post-closure care for a landfill under Subpart G and
Section
725.410,
including the following:
A) Eliminate free
liquids by removing liquid wastes or solidifying the remaining wastes and waste
residues;
B) Stabilize remaining
wastes to a bearing capacity sufficient to support final cover; and
C) Cover the surface impoundment with a final
cover designed and constructed to do the following:
i) Provide long-term minimization of the
migration of liquids through the closed impoundment;
ii) Function with minimum
maintenance;
iii) Promote drainage
and minimize erosion or abrasion of the cover;
iv) Accommodate settling and subsidence so
that the cover's integrity is maintained; and
v) Have a permeability less than or equal to
the permeability of any bottom liner system or natural subsoils
present.
b) In addition to the requirements of Subpart G of this Part and Section 725.410, during the post-closure care period the owner or operator of a surface impoundment in which wastes, waste residues or contaminated materials remain after closure in accordance with subsection (a)(2) must:
1) Maintain the integrity and
effectiveness of the final cover, including making repairs to the cover as
necessary to correct the effects of settling, subsidence, erosion, or other
events;
2) Maintain and monitor the
LDS in accordance with 35 Ill. Adm. Code
724.321(c)(2)(D)
and (c)(3) and
725.326(b)
and comply with all other applicable LDS requirements of this Part;
3) Maintain and monitor the groundwater
monitoring system and comply with all other applicable requirements of Subpart
F of this Part; and
4) Prevent
run-on and run-off from eroding or damaging the final cover.
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