Current through Register Vol. 50, No. 9, September 20, 2024
A. A waste pile (except for the portion of
the waste pile in operation prior to date of issuance of the hazardous waste
permit) must have:
1. a synthetic liner that
is designed, constructed, and installed to prevent any migration of wastes out
of the pile into the adjacent subsurface soil, or groundwater or surface water
at any time during the active life (including the closure period) of the waste
pile. The liner may be constructed of materials that may allow waste to migrate
into the liner itself (but not into the adjacent subsurface soil or,
groundwater or surface water) during the active life of the facility. The liner
must be:
a. constructed of materials that
have appropriate chemical properties and sufficient strength and thickness to
prevent failure due to pressure gradients (including static head and external
hydrogeologic forces), physical contact with the waste or leachate to which
they are exposed, climatic conditions, the stress of installation, and the
stress of daily operations;
b.
placed upon a foundation or base capable of providing support to the liner and
resistant to pressure gradients above and below the liner in order to prevent
failure of the liner due to settlement, compression, or uplift; and
c. installed to cover all surrounding earth
likely to be in contact with the waste or leachate; and
2. a leachate collection and removal system
immediately above the liner that is designed, constructed, maintained, and
operated to collect and remove leachate from the pile. The administrative
authority will specify design and operating conditions in the permit to ensure
that the leachate depth over the liner does not exceed 30 centimeters (1 foot).
The leachate collection and removal system must be constructed of materials
that are:
a. chemically resistant to the
waste managed in the pile and the leachate expected to be generated;
b. of sufficient strength and thickness to
prevent collapse under the pressures exerted by overlying wastes, waste cover
materials, and any equipment used at the pile; and
c. designed and operated to function without
clogging through the scheduled closure of the waste pile.
B. The owner or operator may be
exempted from the requirements of LAC 33:V.2303.A if the administrative
authority finds, based on a demonstration by the owner or operator, that
alternate design and operating practices, together with location
characteristics, will prevent the migration of any hazardous constituents into
the groundwater or surface water at any future time. In deciding whether to
grant an exemption, the administrative authority will consider:
1. the nature and quantity of the
wastes;
2. the proposed alternate
design and operation;
3. the
hydrogeologic setting of the facility, including attenuating capacity and
thickness of the liners and soils present between the pile, and groundwater or
surface water; and
4. all other
factors which would influence the quality and mobility of the leachate produced
and the potential for it to migrate to groundwater or surface water.
C. The owner or operator of each
new waste pile unit, each lateral expansion of a waste pile unit, and each
replacement of an existing waste pile unit must install two or more liners and
a leachate collection and removal system above and between such liners.
1. The liner system must include:
a. a top liner designed and constructed of
materials (e.g., a geomembrane) to prevent the migration of hazardous
constituents into such liner during the active life and post-closure care
period; and
b. a composite bottom
liner consisting of at least two components. The upper component must be
designed and constructed of materials (e.g., a geomembrane) to prevent the
migration of hazardous constituents into such component during the active life
and post-closure care period. The lower component must be designed and
constructed of materials to minimize the migration of hazardous constituents if
a breach in the upper component were to occur. The lower component must be
constructed of at least 3 feet (91 cm) of compacted soil material with a
hydraulic conductivity of no more than 1 x 10-7
cm/sec. The administrative authority may require additional liner design
requirements based on the location of the waste pile in relation to drinking
water aquifers.
2. The
liners must comply with LAC 33:V.2303.A.1.a-c.
3. The leachate collection and removal system
immediately above the top liner must be designed, constructed, operated, and
maintained to collect and remove leachate from the waste pile during the active
life and post-closure care period. The administrative authority will specify
design and operating conditions in the permit to ensure that the leachate depth
over the liner does not exceed 1 foot (30 cm). The leachate collection and
removal system must comply with LAC 33:V.2303.C.4.c-d.
4. The leachate collection and removal system
between the liners (and immediately above the bottom composite liner in the
case of multiple leachate collection and removal systems) is also a leak
detection system. This leak detection system must be capable of detecting,
collecting, and removing leaks of hazardous constituents at the earliest
practicable time through all areas of the top liner which are likely to be
exposed to waste or leachate during the active life and post-closure care
period. The requirements for a leak detection system in this Section are
satisfied by installation of a system that is, at a minimum:
a. constructed with a bottom slope of 2
percent or more;
b. constructed of
granular drainage materials with a hydraulic conductivity of 1 x
10-2 cm/sec or more and a thickness of 12 inches
(30.5 cm) or more; or constructed of synthetic or geonet drainage materials
with a transmissivity of 3 x 10-5
m2/sec or more;
c. constructed of materials that are
chemically resistant to the waste managed in the waste pile and the leachate
expected to be generated and that are of sufficient strength and thickness to
prevent collapse under the pressures exerted by overlying wastes, waste cover
materials, and equipment used at the waste pile;
d. designed and operated to minimize clogging
during the active life and post-closure care period; and
e. constructed with sumps and liquid removal
methods (e.g., pumps) of sufficient size to collect and remove liquids from the
sump and prevent liquids from backing up into the drainage layer. Each unit
must have its own sump(s). The design of each sump and removal system must
provide a method for measuring and recording the volume of liquids present in
the sump and of liquids removed from the sump.
5. The owner or operator shall collect and
remove pumpable liquids in the leak detection system sumps to minimize the head
on the bottom liner.
6. The owner
or operator of a leak detection system that is not located completely above the
seasonal high water table must demonstrate that the operation of the leak
detection system will not be adversely affected by the presence of
groundwater.
D. The
administrative authority may approve alternative design or operating practices
to those specified in LAC 33:V.2303.C if the owner or operator demonstrates to
the administrative authority that such design and operating practices, together
with location characteristics:
1. will
prevent the migration of any hazardous constituent into the groundwater or
surface water at least as effectively as the liners and leachate collection and
removal systems specified in LAC 33:V.2303.C; and
2. will allow detection of leaks of hazardous
constituents through the top liner at least as effectively.
E. LAC 33:V.2303.C does not apply
to monofills that are granted a waiver by the administrative authority in
accordance with LAC 33:V.2903.L.
F.
The owner or operator of any replacement waste pile unit is exempt from LAC
33:V.2303.C if:
1. the existing unit was
constructed in compliance with the design standards of Section 3004(o)(1)(A)(i)
and (o)(5) of the Resource Conservation and Recovery Act; and
2. there is no reason to believe that the
liner is not functioning as designed.
G. The owner or operator must design,
construct, operate, and maintain a run-on control system capable of preventing
flow onto the active portion of the pile during peak discharge from at least a
24-hour, 25-year storm.
H. The
owner or operator must design, construct, operate, and maintain a run-off
management system to collect and control at least the water volume resulting
from a 24-hour, 25-year storm.
I.
Collection and holding facilities (e.g., tanks or basins) associated with
run-on and run-off control systems must be emptied or otherwise managed
expeditiously after storms to maintain design capacity of the system.
J. If the pile contains any particulate
matter which may be subject to wind dispersal, the owner or operator must cover
or otherwise manage the pile to control wind dispersal. Wetting of the waste
pile for control of particulate matter is not allowed unless the waste pile is
equipped with a leachate collection system equivalent to LAC
33:V.2303.A.2.
K. The owner or
operator of a double-lined waste pile is subject to regulation under LAC
33:V.Chapter 33 and the following conditions.
1. The pile must be underlain by two liners
which are designed and constructed in a manner that prevents the migration of
liquids into or out of the space between the liners. Both liners must meet all
the specifications of LAC 33:V.2303.A.1.
2. A leak detection system must be designed,
constructed, maintained, and operated between the liners to detect any
migration of liquids into the space between the liners.
3. The pile must have a leachate collection
and removal system above the top liner that is designed, constructed,
maintained, and operated in accordance with LAC 33:V.2303.A.2.
4. If liquid leaks into the leak detection
system, the owner or operator must:
a. notify
the Office of Environmental Services of the leak in writing within seven days
after detecting the leak; and
b.
within a period of time specified in the permit, remove accumulated liquid,
repair or replace the liner which is leaking to prevent the migration of the
liquids through the liner, and obtain a certification from a qualified engineer
that, to the best of his knowledge and opinion, the leak has been
stopped.
L.
The administrative authority will specify in the permit all design and
operating practices that are necessary to ensure that the requirements of this
Section are satisfied.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
30:2180 et
seq.
