Ohio Admin. Code 3745-57-83 - Design and operating requirements for drip pads
(A) Drip pads must:
(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 x 10-7 centimeters per second,
e.g., existing concrete pads must be sealed, coated, or covered with a surface
material with a hydraulic conductivity of less than or equal to 1 x
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
must be maintained free of cracks and gaps that could adversely affect its
hydraulic conductivity, and the material must 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 must obtain and keep on file at the facility a written
assessment of the drip pad, reviewed and certified by
an independent, qualified registered
a qualified professional engineer that attests to the
results of the evaluation. The assessment must be reviewed, updated, and
recertified annually. The evaluation must document the extent to which the drip
pad meets the design and operating standards of this rule, except for paragraph
(B) of this rule; and
.
(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.
[Note
(B) If an owner/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 must 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 must 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 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
drip pad leakage to which they 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 must 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 it can be removed from below the
drip pad. The date, time, and quantity of any leakage collected in this system
and removed must be documented in the operating log.
(C) Drip pads must be maintained such that
they remain free of cracks, gaps, corrosion, or other deterioration that could
cause hazardous waste to be released from the drip pad.
[Note
(D) The drip pad and associated collection
system must 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 must 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 must 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 must be
evaluated to determine that it meets the requirements of paragraphs (A) to (F)
of this rule and the owner or operator must obtain a
written statement from an independent,
qualified registered
a qualified
professional engineer certifying that the drip pad design meets the
requirements of this rule.
(H)
Drippage and accumulated precipitation must be removed from the associated
collection system as necessary to prevent overflow onto the drip pad.
(I) The drip pad surface must 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 must
document the date and time of each cleaning and the cleaning procedure used in
the facility's operating log. The owner/operator must determine if the residues
are hazardous in accordance with rule
3745-52-11
of the Administrative Code and, if so, must manage them 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 must 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 non-pressure
processes must be held on the drip pad until drippage has ceased. The owner or
operator must 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 must 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 must 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 must:
(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;
(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 must 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 must 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 must maintain, as part of the facility operating log, documentation
of past operating and waste handling practices. This must 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.
Notes
R.C. 119.032 review dates: Exempt
Promulgated Under: 119.03
Statutory Authority: 3734.12
Rule Amplifies: 3734.12
Prior Effective Dates: 09/02/1987, 12/07/2000, 12/07/2004, 02/16/2009
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