Current through Register Vol. 48, No. 38, September 20, 2024
a) Leachate shall be removed from the
drainage and collection system when the leachate level in the landfill
interferes with landfill operations or exceeds ten feet, or when the unit is
subject to assessment monitoring in accordance with Section
817.415(b).
The operator is responsible for the operation of a leachate management system
designed to handle all leachate removed from the collection system. The
leachate management system shall consist of any combination of storage,
treatment, pretreatment, and disposal options designed and constructed in
compliance with the requirements of this Section.
b) The leachate management system shall
consist of any combination of multiple treatment and storage structures, to
allow the management and disposal of leachate during routine maintenance and
repairs.
c) Standards for on-site
treatment and pretreatment:
1) All on-site
treatment or pretreatment systems shall be considered part of the
facility.
2) The on-site treatment
or pretreatment system shall be designed in accordance with the expected
characteristics of the leachate. The design may include modifications to the
system necessary to accommodate changing leachate characteristics.
3) The on-site treatment or pretreatment
system shall be designed to function for the entire design period.
4) All of the facility's unit operations,
tanks, ponds, lagoons and basins shall be designed and constructed with liners
or containment structures to control seepage to groundwater. The ponds,
lagoons, and basins shall be inspected prior to use for cracks and settling
and, if leachate is stored in them for more than 60 days, they shall be subject
to groundwater monitoring pursuant to this Part.
5) All treated effluent discharged to waters
of the State shall meet the requirements of 35 Ill. Adm. Code 309.
6) The treatment system shall be operated by
an operator certified under the requirements of 35 Ill. Adm. Code
312.
d) Standards for
leachate storage systems:
1) The leachate
storage facility must be able to store a minimum of at least five days' worth
of accumulated leachate at the maximum generation rate used in designing the
leachate drainage system in accordance with Section
817.407.
The minimum storage capacity may be built up over time and in stages, so long
as the capacity for five consecutive days of accumulated leachate, during
extreme precipitation conditions, is available at any time during the design
period of the facility.
2) All
leachate storage tanks shall be equipped with secondary containment systems
equivalent to the protection provided by a clay liner 0.61 meter (2 feet) thick
having a permeability no greater than 10-7
centimeters per second.
3) Leachate
storage systems shall be fabricated from material compatible with the leachate
expected to be generated and resistant to temperature extremes.
4) The leachate storage system shall not
cause or contribute to a malodor.
e) Standards for discharge to an off-site
treatment works:
1) Leachate may be discharged
to an off-site treatment works that meets the following requirements:
A) All discharges of effluent from the
treatment works shall meet the requirements of 35 Ill. Adm. Code 309.
B) The treatment system shall be operated by
an operator certified under the requirements of 35 Ill. Adm. Code
312.
C) No more than 50 percent of
the average daily influent flow can be attributable to leachate from the solid
waste disposal facility. Otherwise, the treatment works shall be considered a
part of the solid waste disposal facility.
2) The operator is responsible for securing
permission from the off-site treatment works for authority to discharge to the
treatment works.
3) All discharges
to a treatment works shall meet the requirements of 35 Ill. Adm. Code 307 and
310.
4) Pumps, meters, valves and
monitoring stations that control and monitor the flow of leachate from the unit
and which are under the control of the operator shall be considered part of the
facility and shall be accessible to the operator at all times.
5) Leachate shall be allowed to flow into the
sewerage system at all times; however, if access to the treatment works is
restricted or anticipated to be restricted for longer than five days, an
alternative leachate management system shall be constructed in accordance with
subsection (c) of this Section.
6)
Where leachate is not directly discharged into a sewerage system, the operator
shall provide storage capacity sufficient to transfer all leachate to an
off-site treatment works. The storage system shall meet the requirements of
subsection (d) of this Section.
f) Leachate monitoring:
1) Representative samples of leachate shall
be collected from each unit and tested in accordance with subsection (f)(2) of
this Section at a frequency of once per quarter. The frequency of testing may
be changed to once per year for any monitored constituent, if it is not
detected in the leachate for four consecutive quarters. However, if such a
constituent is detected in the leachate, testing frequency shall return to a
quarterly schedule and the constituent added to the groundwater monitoring
program requirements of Section 817.415. In such case, the testing frequency
shall remain on a quarterly schedule until such time as the monitored
constituent has remained undetected for four additional quarters.
2) Leachate and discharges of leachate from
units shall be monitored for constituents determined by the characteristics of
the waste to be disposed of in the unit. They shall include, at a minimum:
A) pH;
B) Annually, the MALCs listed in Section
817.106
and the constituents listed in Section 817.Appendix A of this Part;
C) Any other constituents listed in the
operator's NPDES discharge permit, pursuant to 35 Ill. Adm. Code 304, or
required by a publicly owned treatment works, pursuant to 35 Ill. Adm. Code 307
and 310; and
D) All of the
indicator constituents chosen in accordance with Section
817.415(a)(2)(B)
and used by the operator for groundwater
monitoring.
3) The
operator shall also monitor the leachate head within each unit.
g) Time of operation of the
leachate management system:
1) The operator
shall collect and dispose of leachate for a minimum period of 5 years after
closure until treatment is no longer necessary.
2) Treatment is no longer necessary if the
leachate constituents do not exceed the wastewater effluent standards in 35
Ill. Adm. Code
304.124,
304.125, and
304.126.
h) If the results of testing of
leachate samples in accordance with subsection (f) above show that the leachate
exceeds the limits for low risk waste as defined in Section 817.106, the
operator shall:
1) notify the Agency in
writing of this finding within 10 days following the finding;
2) verify the exceedence by taking additional
samples within 45 days after the initial observation;
3) report the results of the verification
sampling to the Agency within 60 days after the initial observation;
4) determine the source of the exceedence,
which may include, but not be limited to, the waste itself, natural phenomena,
sampling or analysis errors, or an offsite source, within 90 days after the
initial observation; and
5) notify
the Agency in writing of a confirmed exceedence and provide the rationale used
in such a determination within ten days after the determination.
i) If, as a result of further
testing of the leachate and the background groundwater and analysis using the
35 Ill. Adm. Code
811.320(e)
statistical procedure, it is determined that
the facility leachate exceeds the Section
817.106
limits for low risk waste, the facility shall:
1) no longer be subject to the low risk waste
landfill requirements of Subpart C of this Part; and
2) be subject to the requirements for
chemical waste landfills of 35 Ill. Adm. Code
814.302.
j) Leachate sampling and analysis
shall be completed in accordance with the standards of 35 Ill. Adm. Code
817.414(e)(1),
(e)(3), (e)(4), and (e)(5).
