Current through Register Vol. 48, No. 38, September 20, 2024
a) To implement remedies pursuant to Section
724.201
or RCRA section 3008(h), or to implement remedies at a permitted facility that
is not subject to Section 724.201, the Agency may designate an area at the
facility as a corrective action management unit in accordance with the
requirements of this Section. "Corrective action management unit" or "CAMU"
means an area within a facility that is used only for managing remediation
wastes for implementing corrective action or cleanup at that facility. A CAMU
must be located within the contiguous property under the control of the owner
or operator where the wastes to be managed in the CAMU originated. One or more
CAMUs may be designated at a facility.
1)
Placement of remediation wastes into or within a CAMU does not constitute land
disposal of hazardous wastes.
2)
Consolidation or placement of remediation wastes into or within a CAMU does not
constitute creation of a unit subject to minimum technology
requirements.
b)
Designation of a CAMU
1) The Agency may
designate a regulated unit (as defined in Section
724.190(a)(2)
) as a CAMU, or it may incorporate a regulated unit into a CAMU, if the
following is true:
A) The regulated unit is
closed or closing, meaning it has begun the closure process pursuant to Section
724.213
or 35 Ill. Adm. Code
725.213;
and
B) Inclusion of the regulated
unit will enhance implementation of effective, protective, and reliable
remedial actions for the facility.
2) The requirements of Subparts F, G, and H
and the unit-specific requirements of this Part or the 35 Ill. Adm. Code 725
requirements that applied to that regulated unit will continue to apply to that
portion of the CAMU after incorporation into the CAMU.
c) The Agency must designate a CAMU in
accordance with the following factors:
1) The
CAMU must facilitate the implementation of reliable, effective, protective, and
cost-effective remedies;
2) Waste
management activities associated with the CAMU must not create unacceptable
risks to humans or to the environment resulting from exposure to hazardous
wastes or hazardous constituents;
3) The CAMU must include uncontaminated areas
of the facility only if including such areas for the purpose of managing
remediation waste is more protective than managing such wastes at contaminated
areas of the facility;
4) Areas
within the CAMU where wastes remain in place after its closure must be managed
and contained so as to minimize future releases to the extent
practicable;
5) The CAMU must
expedite the timing of remedial activity implementation, when appropriate and
practicable;
6) The CAMU must
enable the use, when appropriate, of treatment technologies (including
innovative technologies) to enhance the long-term effectiveness of remedial
actions by reducing the toxicity, mobility, or volume of wastes that will
remain in place after closure of the CAMU; and
7) The CAMU must, to the extent practicable,
minimize the land area of the facility upon which wastes will remain in place
after closure of the CAMU.
d) The owner or operator must provide
sufficient information to enable the Agency to designate a CAMU in accordance
with the standards of this Section.
e) The Agency must specify in the permit the
requirements applicable to a CAMU, including the following:
1) The areal configuration of the
CAMU.
2) Requirements for
remediation waste management, including the specification of applicable design,
operation, and closure requirements.
3) Requirements for groundwater monitoring
that are sufficient to do the following:
A)
Continue to detect and to characterize the nature, extent, concentration,
direction, and movement of existing releases of hazardous constituents in
groundwater from sources located within the CAMU; and
B) Detect and subsequently characterize
releases of hazardous constituents to groundwater that may occur from areas of
the CAMU in which wastes will remain in place after closure of the
CAMU.
4) Closure and
Post-Closure Care Requirements
A) Closure of a
CAMU must do the following:
i) Minimize the
need for further maintenance; and
ii) Control, minimize, or eliminate, to the
extent necessary to adequately protect human health and the environment, for
areas where wastes remain in place, post-closure escape of hazardous waste,
hazardous constituents, leachate, contaminated run-off, or hazardous waste
decomposition products to the ground, to surface waters, or to the
atmosphere.
B)
Requirements for closure of a CAMU must include the following, as appropriate:
i) Requirements for excavation, removal,
treatment, or containment of wastes;
ii) For areas in which wastes will remain
after closure of the CAMU, requirements for the capping of such areas;
and
iii) Requirements for the
removal and decontamination of equipment, devices, and structures used in
remediation waste management activities within the CAMU.
C) In establishing specific closure
requirements for a CAMU pursuant to this subsection (e), the Agency must
consider the following factors:
i) The
characteristics of the CAMU;
ii)
The volume of wastes that remain in place after closure;
iii) The potential for releases from the
CAMU;
iv) The physical and chemical
characteristics of the waste;
v)
The hydrological and other relevant environmental conditions at the facility
that may influence the migration of any potential or actual releases;
and
vi) The potential for exposure
of humans and environmental receptors if releases were to occur from the
CAMU.
D) Post-closure
care requirements as necessary to adequately protect human health and the
environment, including, for areas where wastes will remain in place, monitoring
and maintenance activities and the frequency with which such activities must be
performed to ensure the integrity of any cap, final cover, or other containment
system.
f)
The Agency must document the rationale for designating the CAMU and must make
such documentation available to the public.
g) Incorporation of a CAMU into an existing
permit must be approved by the Agency according to the procedures for
Agency-initiated permit modifications pursuant to 35 Ill. Adm. Code
703.270
through
703.273 or
according to the permit modification procedures of 35 Ill. Adm. Code
703.283.
h) The designation of a CAMU does not change
the Agency's existing authority to address cleanup levels, media-specific
points of compliance to be applied to remediation at a facility, or other
remedy selection decisions.
