Current through all regulations passed and filed through September 16, 2024
(A)
Drip pads
shall:
(1) Be
constructed of non-earthen materials, excluding wood and non-structurally
supported asphalt;
(2) Be sloped to
free-drain treated wood drippage, rain and other waters, or solutions of
drippage and water or other wastes to the associated collection
system;
(3) Have a curb or berm
around the perimeter;
(4)
(a) Have a hydraulic conductivity of less
than or equal to 1 × 10-7 centimeters per second,
e.g., existing concrete pads
shall be sealed, coated, or covered with a
surface material with a hydraulic conductivity of less than or equal to 1 ×
10-7 centimeters per
second such that the entire surface where drippage occurs or may run across is
capable of containing such drippage and mixtures of drippage and precipitation,
materials, or other wastes while being routed to an associated collection
system. This surface material
shall be maintained free of cracks and gaps that
could adversely affect its hydraulic conductivity, and the material
shall be
chemically compatible with the preservatives that contact the drip pad. The
requirements of this provision apply only to existing drip pads and those drip
pads for which the owner or operator elects to comply with paragraph (B) of
rule
3745-57-82
of the Administrative Code instead of paragraph (A) of rule
3745-57-82
of the Administrative Code.
(b) The owner or operator
shall
obtain and keep on file at the facility a written assessment of the drip pad,
reviewed and certified by a qualified professional engineer
who
attests to the results of the evaluation. The assessment
shall be
reviewed, updated, and recertified annually. The evaluation
shall
document the extent to which the drip pad meets the design and operating
standards of this rule, except for paragraph (B) of this
rule.
(5) Be of
sufficient structural strength and thickness to prevent failure due to physical
contact, climatic conditions, the stress of daily operations, e.g., variable
and moving loads such as vehicle traffic, movement of wood, etc..
[Comment: Ohio EPA will generally consider applicable standards
established by professional organizations generally recognized by the industry
such as the American concrete institute (ACI) or the American society of
testing and materials (ASTM) in judging the structural integrity requirement of
paragraph (A)(5) of this rule.]
(B) If an
owner or
operator elects to comply with paragraph (A) of rule
3745-57-82
of the Administrative Code instead of paragraph (B) of rule
3745-57-82
of the Administrative Code, the drip pad
shall have:
(1) A synthetic liner installed below the
drip pad that is designed, constructed, and installed to prevent leakage from
the drip pad into the adjacent subsurface soil or ground water or surface water
at any time during the active life (including the closure period) of the drip
pad. The liner
shall be constructed of materials that will prevent
waste from being absorbed into the liner and to prevent releases into the
adjacent subsurface soil or ground water or surface water during the active
life of the facility. The liner
shall 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 drip pad leakage to which
the materials
are exposed, climatic conditions, the stress of installation, and the stress of
daily operation (including stresses from vehicular traffic on the drip
pad);
(b) Placed upon a foundation
or base capable of providing support to the liner and resistance to pressure
gradients above and below the liner to prevent failure of the liner due to
settlement, compression, or uplift; and
(c) Installed to cover all surrounding earth
that could come in contact with the waste or leakage; and
(2) A leakage detection system immediately
above the liner that is designed, constructed, maintained, and operated to
detect leakage from the drip pad. The leakage detection system
shall
be:
(a) Constructed of materials that are:
(i) Chemically resistant to the waste managed
in the drip pad and the leakage that might be generated; and
(ii) Of sufficient strength and thickness to
prevent collapse under the pressures exerted by overlaying materials and by any
equipment used at the drip pad;
(b) Designed and operated to function without
clogging through the scheduled closure of the drip pad; and
(c) Designed so that it will detect the
failure of the drip pad or the presence of a release of hazardous waste or
accumulated liquid at the earliest practicable time.
(3) A leakage collection system immediately
above the liner that is designed, constructed, maintained, and operated to
collect leakage from the drip pad such that
the leakage can be
removed from below the drip pad. The date, time, and quantity of any leakage
collected in this system and removed
shall be documented in the operating
log.
(C) Drip pads
shall be
maintained such that
the drip pads remain free of cracks, gaps,
corrosion, or other deterioration that could cause hazardous waste to be
released from the drip pad.
[Comment: See paragraph (M) of this rule for remedial action
required if deterioration or leakage is detected.]
(D) The drip pad and associated collection
system
shall be designed and operated to convey, drain, and
collect liquid resulting from drippage or precipitation in order to prevent
run-off.
(E) Unless protected by a
structure, as described in paragraph (B) of rule
3745-57-80
of the Administrative Code, the owner or operator
shall design,
construct, operate, and maintain a run-on control
system capable of preventing flow onto the drip pad during peak discharge from
at least a twenty-four-hour, twenty-five-year storm, unless the system has
sufficient excess capacity to contain any run-off that might enter the
system.
(F) Unless protected by a
structure or cover as described in paragraph (B) of rule
3745-57-80
of the Administrative Code, the owner or operator
shall design,
construct, operate, and maintain a run-off
management system to collect and control at least the water volume resulting
from a twenty-four-hour, twenty-five-year storm.
(G) The drip pad
shall be
evaluated to determine that
the drip pad meets the requirements of paragraphs
(A) to (F) of this rule and the owner or operator
shall obtain a
statement from a qualified professional engineer certifying that the drip pad
design meets the requirements of this rule.
(H) Drippage and accumulated precipitation
shall be
removed from the associated collection system as necessary to prevent overflow
onto the drip pad.
(I) The drip pad
surface
shall be cleaned thoroughly in a manner and frequency
such that accumulated residues of hazardous waste or other materials are
removed, with residues being properly managed as hazardous waste, so as to
allow weekly inspections of the entire drip pad surface without interference or
hindrance from accumulated residues of hazardous waste or other materials on
the drip pad. The owner or operator
shall document the date and time of each cleaning
and the cleaning procedure used in the facility's operating log. The
owner or operator shall determine if the residues are
hazardous in accordance with rule
3745-52-11
of the Administrative Code and, if so,
shall manage
the residues
under rules
3745-50-40
to
3745-50-235
and Chapters 3745-51, 3745-52, 3745-53, 3745-54 to 3745-57, 3745-65 to 3745-69,
3745-205, 3745-256, 3745-266, and 3745-270 of the Administrative
Code.
(J) Drip pads
shall be
operated and maintained in a manner to minimize tracking of hazardous waste or
hazardous waste constituents off the drip pad as a result of activities by
personnel or equipment.
(K) After
being removed from the treatment vessel, treated wood from pressure and
nonpressure processes
shall be held on the drip pad until drippage has
ceased. The owner or operator
shall maintain records sufficient to document
that all treated wood is held on the pad following treatment in accordance with
this requirement.
(L) Collection
and holding units associated with run-on and run-off control systems
shall be
emptied or otherwise managed as soon as possible after storms to maintain
design capacity of the system.
(M)
Throughout the active life of the drip pad and as specified in the permit, if
the owner or operator detects a condition that may have caused or has caused a
release of hazardous waste, the condition
shall be
repaired within a reasonably prompt period of time following discovery, in
accordance with the following procedures:
(1)
Upon detection of a condition that may have caused or has caused a release of
hazardous waste (e.g., upon detection of leakage in the leak detection system),
the owner or operator
shall:
(a) Enter
a record of the discovery in the facility operating log;
(b) Immediately remove the portion of the
drip pad affected by the condition from service;
(c) Determine what steps must be taken to
repair the drip pad and clean up any leakage from below the drip pad, and
establish a schedule for accomplishing the repairs; and
(d)
Within twenty-four hours after discovery of the condition, notify the director
of the condition and, within ten working days, provide written notice to the
director with a description of the steps that will be taken to repair the drip
pad and clean up any leakage, and the schedule for accomplishing this
work.
(2) The director
will review the information submitted, make a determination regarding whether
the pad
shall be removed from service completely or partially
until repairs and cleanup are complete, and
notify the owner or operator of the determination and the underlying rationale
in writing.
(3) Upon completing all
repairs and cleanup, the owner or operator
shall notify the
director in writing and provide a certification signed by an independent,
qualified registered professional engineer, that the repairs and cleanup have
been completed according to the written plan submitted in accordance with
paragraph (M)(1)(d) of this rule.
(N) Should a permit be necessary, the
director will specify in the permit all design and operating practices that are
necessary to ensure that the requirements of this rule are satisfied.
(O) The owner or operator
shall
maintain, as part of the facility operating log, documentation of past
operating and waste handling practices. This
shall include
identification of preservative formulations used in the past, a description of
drippage management practices, and a description of treated wood storage and
handling practices.
