Ill. Admin. Code tit. 35, § 725.985 - Standards: Tanks
a) The
provisions of this Section apply to the control of air pollutant emissions from
tanks for which Section
725.983(b)
references the use of this Section for such air emission control.
b) The owner or operator must control air
pollutant emissions from each tank subject to this Section in accordance with
the following requirements, as applicable:
1)
For a tank that manages hazardous waste that meets all of the conditions
specified in subsections (b)(1)(A) through (b)(1)(C), the owner or operator
must control air pollutant emissions from the tank in accordance with the Tank
Level 1 controls specified in subsection (c) or the Tank Level 2 controls
specified in subsection (d).
A) The hazardous
waste in the tank has a maximum organic vapor pressure that is less than the
maximum organic vapor pressure limit for the tank's design capacity category,
as follows:
i) For a tank design capacity
equal to or greater than 151 m3 (5333
ft3 or 39,887 gal), the maximum organic vapor
pressure limit for the tank is 5.2 kPa (0.75 psia or 39 mm Hg);
ii) For a tank design capacity equal to or
greater than 75 m3 (2649
ft3 or 19,810 gal) but less than 151
m3 (5333 ft3 or 39,887
gal), the maximum organic vapor pressure limit for the tank is 27.6 kPa (4.0
psia or 207 mm Hg); or
iii) For a
tank design capacity less than 75 m3 (2649
ft3or 19,810 gal), the maximum organic vapor
pressure limit for the tank is 76.6 kPa (11.1 psia or 574 mm Hg).
B) The hazardous waste in the tank
is not heated by the owner or operator to a temperature that is greater than
the temperature at which the maximum organic vapor pressure of the hazardous
waste is determined for the purpose of complying with subsection
(b)(1)(A).
C) The hazardous waste
in the tank is not treated by the owner or operator using a waste stabilization
process, as defined in Section
725.981.
2) For a tank that manages
hazardous waste that does not meet all of the conditions specified in
subsections (b)(1)(A) through (b)(1)(C), the owner or operator must control air
pollutant emissions from the tank by using Tank Level 2 controls in accordance
with the requirements of subsection (d). Examples of tanks required to use Tank
Level 2 controls include the following: a tank used for a waste stabilization
process and a tank for which the hazardous waste in the tank has a maximum
organic vapor pressure that is equal to or greater than the maximum organic
vapor pressure limit for the tank's design capacity category, as specified in
subsection (b)(1)(A).
c)
An owner or operator controlling air pollutant emissions from a tank using Tank
Level 1 controls must meet the requirements specified in subsections (c)(1)
through (c)(4):
1) The owner or operator must
determine the maximum organic vapor pressure for a hazardous waste to be
managed in the tank using Tank Level 1 controls before the first time the
hazardous waste is placed in the tank. The maximum organic vapor pressure must
be determined using the procedures specified in Section
725.984(c).
Thereafter, the owner or operator must perform a new determination whenever
changes to the hazardous waste managed in the tank could potentially cause the
maximum organic vapor pressure to increase to a level that is equal to or
greater than the maximum organic vapor pressure limit for the tank design
capacity category specified in subsection (b)(1)(A), as applicable to the
tank.
2) The tank must be equipped
with a fixed roof designed to meet the following specifications:
A) The fixed roof and its closure devices
must be designed to form a continuous barrier over the entire surface area of
the hazardous waste in the tank. The fixed roof may be a separate cover
installed on the tank (e.g., a removable cover mounted on an open-top tank) or
may be an integral part of the tank structural design (e.g., a horizontal
cylindrical tank equipped with a hatch).
B) The fixed roof must be installed in such a
manner that there are no visible cracks, holes, gaps, or other open spaces
between roof section joints or between the interface of the roof edge and the
tank wall.
C) Either of the
following must be true of each opening in the fixed roof and of any manifold
system associated with the fixed roof must be either:
i) The opening or manifold system is equipped
with a closure device designed to operate so that when the closure device is
secured in the closed position there are no visible cracks, holes, gaps, or
other open spaces in the closure device or between the perimeter of the opening
and the closure device; or
ii) The
opening or manifold system is connected by a closed-vent system that is vented
to a control device. The control device must remove or destroy organics in the
vent stream, and it must be operating whenever hazardous waste is managed in
the tank, except as provided for in subsection (c)(2)(E).
D) The fixed roof and its closure devices
must be made of suitable materials that will minimize exposure of the hazardous
waste to the atmosphere, to the extent practical, and which will maintain the
integrity of the fixed roof and closure devices throughout their intended
service life. Factors to be considered when selecting the materials for and
designing the fixed roof and closure devices must include the following:
organic vapor permeability; the effects of any contact with the hazardous waste
or its vapors managed in the tank; the effects of outdoor exposure to wind,
moisture, and sunlight; and the operating practices used for the tank on which
the fixed roof is installed.
E) The
control device operated pursuant to subsection (c)(2)(C) needs not remove or
destroy organics in the vent stream under the following conditions:
i) During periods when it is necessary to
provide access to the tank for performing the activities of subsection
(c)(2)(E)(ii), venting of the vapor headspace underneath the fixed roof to the
control device is not required, opening of closure devices is allowed, and
removal of the fixed roof is allowed. Following completion of the activity, the
owner or operator must promptly secure the closure device in the closed
position or reinstall the cover, as applicable, and resume operation of the
control device; and
ii) During
periods of routine inspection, maintenance, or other activities needed for
normal operations, and for the removal of accumulated sludge or other residues
from the bottom of the tank.
BOARD NOTE: Subsections (c)(2)(E)(i) and (c)(2)(E)(ii) are derived from 40 CFR 265.985(c)(2)(iii)(B)(1) and (c)(2)(iii)(B)(2) , which the Board has codified here to comport with Illinois Administrative Code format requirements.
3) Whenever a hazardous waste is in the tank,
the fixed roof must be installed with each closure device secured in the closed
position, except as follows:
A) Opening of
closure devices or removal of the fixed roof is allowed at the following times:
i) To provide access to the tank for
performing routine inspection, maintenance, or other activities needed for
normal operations. Examples of such activities include those times when a
worker needs to open a port to sample the liquid in the tank, or when a worker
needs to open a hatch to maintain or repair equipment. Following completion of
the activity, the owner or operator must promptly secure the closure device in
the closed position or reinstall the cover, as applicable, to the
tank.
ii) To remove accumulated
sludge or other residues from the bottom of tank.
B) Opening of a spring-loaded pressure-vacuum
relief valve, conservation vent, or similar type of pressure relief device that
vents to the atmosphere is allowed during normal operations for the purpose of
maintaining the tank internal pressure in accordance with the tank design
specifications. The device must be designed to operate with no detectable
organic emissions when the device is secured in the closed position. The
settings at which the device opens must be established so that the device
remains in the closed position whenever the tank internal pressure is within
the internal pressure operating range determined by the owner or operator based
on the tank manufacturer recommendations; applicable regulations; fire
protection and prevention codes; standard engineering codes and practices; or
other requirements for the safe handling of flammable, ignitable, explosive,
reactive, or hazardous materials. Examples of normal operating conditions that
may require these devices to open are during those times when the tank internal
pressure exceeds the internal pressure operating range for the tank as a result
of loading operations or diurnal ambient temperature fluctuations.
C) Opening of a safety device, as defined in
Section 725.981, is allowed at any time conditions require doing so to avoid an
unsafe condition.
4) The
owner or operator must inspect the air emission control equipment in accordance
with the following requirements:
A) The fixed
roof and its closure devices must be visually inspected by the owner or
operator to check for defects that could result in air pollutant emissions.
Defects include, but are not limited to, visible cracks, holes, or gaps in the
roof sections or between the roof and the tank wall; broken, cracked, or
otherwise damaged seals or gaskets on closure devices; and broken or missing
hatches, access covers, caps, or other closure devices.
B) The owner or operator must perform an
initial inspection of the fixed roof and its closure devices on or before the
date that the tank becomes subject to this Section. Thereafter, the owner or
operator must perform the inspections at least once every year, except under
the special conditions provided for in subsection (l).
C) In the event that a defect is detected,
the owner or operator must repair the defect in accordance with the
requirements of subsection (k).
D)
The owner or operator must maintain a record of the inspection in accordance
with the requirements specified in Section
725.990(b).
d) An owner or operator
controlling air pollutant emissions from a tank using Tank Level 2 controls
must use one of the following tanks:
1) A
fixed-roof tank equipped with an internal floating roof in accordance with the
requirements specified in subsection (e);
2) A tank equipped with an external floating
roof in accordance with the requirements specified in subsection (f);
3) A tank vented through a closed-vent system
to a control device in accordance with the requirements specified in subsection
(g);
4) A pressure tank designed
and operated in accordance with the requirements specified in subsection (h);
or
5) A tank located inside an
enclosure that is vented through a closed-vent system to an enclosed combustion
control device in accordance with the requirements specified in subsection
(i).
e) The owner or
operator that controls air pollutant emissions from a tank using a fixed roof
with an internal floating roof must meet the requirements specified in
subsections (e)(1) through (e)(3).
1) The
tank must be equipped with a fixed roof and an internal floating roof in
accordance with the following requirements:
A)
The internal floating roof must be designed to float on the liquid surface
except when the floating roof must be supported by the leg supports.
B) The internal floating roof must be
equipped with a continuous seal between the wall of the tank and the floating
roof edge that meets either of the following requirements:
i) A single continuous seal that is either a
liquid-mounted seal or a metallic shoe seal, as defined in Section 725.981;
or
ii) Two continuous seals mounted
one above the other. The lower seal may be a vapor-mounted seal.
C) The internal floating roof must
meet the following specifications:
i) Each
opening in a noncontact internal floating roof except for automatic bleeder
vents (vacuum breaker vents) and the rim space vents is to provide a projection
below the liquid surface;
ii) Each
opening in the internal floating roof must be equipped with a gasketed cover or
a gasketed lid except for leg sleeves, automatic bleeder vents, rim space
vents, column wells, ladder wells, sample wells, and stub drains;
iii) Each penetration of the internal
floating roof for the purpose of sampling must have a slit fabric cover that
covers at least 90 percent of the opening;
iv) Each automatic bleeder vent and rim space
vent must be gasketed;
v) Each
penetration of the internal floating roof that allows for passage of a ladder
must have a gasketed sliding cover; and
vi) Each penetration of the internal floating
roof that allows for passage of a column supporting the fixed roof must have a
flexible fabric sleeve seal or a gasketed sliding cover.
2) The owner or operator must
operate the tank in accordance with the following requirements:
A) When the floating roof is resting on the
leg supports, the process of filling, emptying, or refilling must be continuous
and must be completed as soon as practical;
B) Automatic bleeder vents are to be set
closed at all times when the roof is floating, except when the roof is being
floated off or is being landed on the leg supports; and
C) Prior to filling the tank, each cover,
access hatch, gauge float well or lid on any opening in the internal floating
roof must be bolted or fastened closed (i.e., no visible gaps). Rim space vents
are to be set to open only when the internal floating roof is not floating or
when the pressure beneath the rim exceeds the manufacturer's recommended
setting.
3) The owner or
operator must inspect the internal floating roof in accordance with the
procedures specified as follows:
A) The
floating roof and its closure devices must be visually inspected by the owner
or operator to check for defects that could result in air pollutant emissions.
Defects include, but are not limited to, the following: when the internal
floating roof is not floating on the surface of the liquid inside the tank;
when liquid has accumulated on top of the internal floating roof; when any
portion of the roof seals have detached from the roof rim; when holes, tears,
or other openings are visible in the seal fabric; when the gaskets no longer
close off the hazardous waste surface from the atmosphere; or when the slotted
membrane has more than 10 percent open area;
B) The owner or operator must inspect the
internal floating roof components as follows, except as provided in subsection
(e)(3)(C):
i) Visually inspect the internal
floating roof components through openings on the fixed roof (e.g., manholes and
roof hatches) at least once every 12 months after initial fill, and
ii) Visually inspect the internal floating
roof, primary seal, secondary seal (if one is in service), gaskets, slotted
membranes, and sleeve seals (if any) each time the tank is emptied and degassed
and at least once every 10 years;
C) As an alternative to performing the
inspections specified in subsection (e)(3)(B) for an internal floating roof
equipped with two continuous seals mounted one above the other, the owner or
operator may visually inspect the internal floating roof, primary and secondary
seals, gaskets, slotted membranes, and sleeve seals (if any) each time the tank
is emptied and degassed and at least every five years;
D) Prior to each inspection required by
subsection (e)(3)(B) or (e)(3)(C), the owner or operator must notify the Agency
in advance of each inspection to provide the Agency with the opportunity to
have an observer present during the inspection. The owner or operator must
notify the Agency of the date and location of the inspection as follows:
i) Prior to each visual inspection of an
internal floating roof in a tank that has been emptied and degassed, written
notification must be prepared and sent by the owner or operator so that it is
received by the Agency at least 30 calendar days before refilling the tank,
except when an inspection is not planned, as provided for in subsection
(e)(3)(D)(ii); and
ii) When a
visual inspection is not planned and the owner or operator could not have known
about the inspection 30 calendar days before refilling the tank, the owner or
operator must notify the Agency as soon as possible, but no later than seven
calendar days before refilling of the tank. This notification may be made by
telephone and immediately followed by a written explanation for why the
inspection is unplanned. Alternatively, written notification, including the
explanation for the unplanned inspection, may be sent so that it is received by
the Regional Administrator at least seven calendar days before refilling the
tank;
E) In the event
that a defect is detected, the owner or operator must repair the defect in
accordance with the requirements of subsection (k); and
F) The owner or operator must maintain a
record of the inspection in accordance with the requirements specified in
Section
725.990(b).
4) Safety devices, as defined in
Section 725.981, may be installed and operated as necessary on any tank
complying with the requirements of this subsection (e).
f) The owner or operator that controls air
pollutant emissions from a tank using an external floating roof must meet the
requirements specified in subsections (f)(1) through (f)(3).
1) The owner or operator must design the
external floating roof in accordance with the following requirements:
A) The external floating roof must be
designed to float on the liquid surface except when the floating roof must be
supported by the leg supports;
B)
The floating roof must be equipped with two continuous seals, one above the
other, between the wall of the tank and the roof edge. The lower seal is
referred to as the primary seal, and the upper seal is referred to as the
secondary seal.
i) The primary seal must be a
liquid-mounted seal or a metallic shoe seal, as defined in Section 725.981. The
total area of the gaps between the tank wall and the primary seal must not
exceed 212 square centimeters (cm2) per meter (10.0
in2 per foot) of tank diameter, and the width of any
portion of these gaps must not exceed 3.8 centimeters (cm) (1.5 inches). If a metallic
shoe seal is used for the primary seal, the metallic shoe seal must be designed
so that one end extends into the liquid in the tank and the other end extends a
vertical distance of at least 61 centimeters (24 inches) above the liquid
surface.
ii) The secondary seal
must be mounted above the primary seal and cover the annular space between the
floating roof and the wall of the tank. The total area of the gaps between the
tank wall and the secondary seal must not exceed 21.2
cm2 per meter (1.0 in2
per foot) of tank diameter, and the width of any portion of these gaps must not
exceed
1.3 cm (0.5 inch);
and
C) The external
floating roof must meet the following specifications:
i) Except for automatic bleeder vents (vacuum
breaker vents) and rim space vents, each opening in a noncontact external
floating roof must provide a projection below the liquid surface;
ii) Except for automatic bleeder vents, rim
space vents, roof drains, and leg sleeves, each opening in the roof must be
equipped with a gasketed cover, seal, or lid;
iii) Each access hatch and each gauge float
well must be equipped with a cover designed to be bolted or fastened when the
cover is secured in the closed position;
iv) Each automatic bleeder vent and each rim
space vent must be equipped with a gasket;
v) Each roof drain that empties into the
liquid managed in the tank must be equipped with a slotted membrane fabric
cover that covers at least 90 percent of the area of the opening;
vi) Each unslotted and slotted guide pole
well must be equipped with a gasketed sliding cover or a flexible fabric sleeve
seal;
vii) Each unslotted guide
pole must be equipped with a gasketed cap on the end of the pole;
viii) Each slotted guide pole must be
equipped with a gasketed float or other device that closes off the liquid
surface from the atmosphere; and
ix) Each gauge hatch and each sample well
must be equipped with a gasketed cover.
2) The owner or operator must operate the
tank in accordance with the following requirements:
A) When the floating roof is resting on the
leg supports, the process of filling, emptying, or refilling must be continuous
and must be completed as soon as practical;
B) Except for automatic bleeder vents, rim
space vents, roof drains, and leg sleeves, each opening in the roof must be
secured and maintained in a closed position at all times except when the
closure device must be open for access;
C) Covers on each access hatch and each gauge
float well must be bolted or fastened when secured in the closed
position;
D) Automatic bleeder
vents must be set closed at all times when the roof is floating, except when
the roof is being floated off or is being landed on the leg supports;
E) Rim space vents must be set to open only
at those times that the roof is being floated off the roof leg supports or when
the pressure beneath the rim seal exceeds the manufacturer's recommended
setting;
F) The cap on the end of
each unslotted guide pole must be secured in the closed position at all times
except when measuring the level or collecting samples of the liquid in the
tank;
G) The cover on each gauge
hatch or sample well must be secured in the closed position at all times except
when the hatch or well must be opened for access; and
H) Both the primary seal and the secondary
seal must completely cover the annular space between the external floating roof
and the wall of the tank in a continuous fashion except during
inspections.
3) The
owner or operator must inspect the external floating roof in accordance with
the procedures specified as follows:
A) The
owner or operator must measure the external floating roof seal gaps in
accordance with the following requirements:
i) The owner or operator must perform
measurements of gaps between the tank wall and the primary seal within 60
calendar days after initial operation of the tank following installation of the
floating roof and, thereafter, at least once every five years;
ii) The owner or operator must perform
measurements of gaps between the tank wall and the secondary seal within 60
calendar days after initial operation of the tank following installation of the
floating roof and, thereafter, at least once every year;
iii) If a tank ceases to hold hazardous waste
for a period of one year or more, subsequent introduction of hazardous waste
into the tank must be considered an initial operation for the purposes of
subsections (f)(3)(A)(i) and (f)(3)(A)(ii);
iv) The owner or operator must determine the
total surface area of gaps in the primary seal and in the secondary seal
individually using the procedure set forth in subsection (f)(3)(D);
v) In the event that the seal gap
measurements do not conform to the specifications in subsection (f)(1)(B), the
owner or operator must repair the defect in accordance with the requirements of
subsection (k); and
vi) The owner
or operator must maintain a record of the inspection in accordance with the
requirements specified in Section
725.990(b);
B) The owner or operator must visually
inspect the external floating roof in accordance with the following
requirements:
i) The floating roof and its
closure devices must be visually inspected by the owner or operator to check
for defects that could result in air pollutant emissions. Defects include, but
are not limited to any of the following: holes, tears, or other openings in the
rim seal or seal fabric of the floating roof; a rim seal detached from the
floating roof; all or a portion of the floating roof deck being submerged below
the surface of the liquid in the tank; broken, cracked, or otherwise damaged
seals or gaskets on closure devices; and broken or missing hatches, access
covers, caps, or other closure devices;
ii) The owner or operator must perform an
initial inspection of the external floating roof and its closure devices on or
before the date that the tank becomes subject to this Section. Thereafter, the
owner or operator must perform the inspections at least once every year except
for the special conditions provided for in subsection (l);
iii) In the event that a defect is detected,
the owner or operator must repair the defect in accordance with the
requirements of subsection (k); and
iv) The owner or operator must maintain a
record of the inspection in accordance with the requirements specified in
Section
725.990(b);
C) Prior to each inspection
required by subsection (f)(3)(A) or (f)(3)(B), the owner or operator must
notify the Agency in advance of each inspection to provide the Agency with the
opportunity to have an observer present during the inspection. The owner or
operator must notify the Agency of the date and location of the inspection as
follows:
i) Prior to each inspection to
measure external floating roof seal gaps as required under subsection
(f)(3)(A), written notification must be prepared and sent by the owner or
operator so that it is received by the Agency at least 30 calendar days before
the date the measurements are scheduled to be performed;
ii) Prior to each visual inspection of an
external floating roof in a tank that has been emptied and degassed, written
notification must be prepared and sent by the owner or operator so that it is
received by the Agency at least 30 calendar days before refilling the tank
except when an inspection is not planned, as provided for in subsection
(f)(3)(C)(iii); and
iii) When a
visual inspection is not planned and the owner or operator could not have known
about the inspection 30 calendar days before refilling the tank, the owner or
operator must notify the Agency as soon as possible, but no later than seven
calendar days before refilling of the tank. This notification may be made by
telephone and immediately followed by a written explanation for why the
inspection is unplanned. Alternatively, written notification, including the
explanation for the unplanned inspection, may be sent so that it is received by
the Regional Administrator at least seven calendar days before refilling the
tank;
D) Procedure for
determining gaps in the primary seal and in the secondary seal for the purposes
of subsection (f)(3)(A)(iv):
i) The seal gap
measurements must be performed at one or more floating roof levels when the
roof is floating off the roof supports;
ii) Seal gaps, if any, must be measured
around the entire perimeter of the floating roof in each place where a 0.32 -cm
(1/4-inch) diameter uniform probe passes freely (without forcing or binding
against the seal) between the seal and the wall of the tank and measure the
circumferential distance of each such location;
iii) For a seal gap measured under this
subsection (f)(3), the gap surface area must be determined by using probes of
various widths to measure accurately the actual distance from the tank wall to
the seal and multiplying each such width by its respective circumferential
distance; and
iv) The total gap
area must be calculated by adding the gap surface areas determined for each
identified gap location for the primary seal and the secondary seal
individually, and then dividing the sum for each seal type by the nominal
diameter of the tank. These total gap areas for the primary seal and secondary
seal are then compared to the respective standards for the seal type, as
specified in subsection (f)(1)(B); and
BOARD NOTE: Subsections (f)(3)(D)(i) through (f)(3)(D)(iv) are derived from 40 CFR 265.1085(f)(3)(i)(D)(1) through (f)(3)(i)(D)(4) , which the Board has codified here to comport with Illinois Administrative Code format requirements.
4) Safety devices, as defined in
Section 725.981, may be installed and operated as necessary on any tank
complying with the requirements of this subsection (f).
g) The owner or operator that controls air
pollutant emissions from a tank by venting the tank to a control device must
meet the requirements specified in subsections (g)(1) through (g)(3).
1) The tank must be covered by a fixed roof
and vented directly through a closed-vent system to a control device in
accordance with the following requirements:
A) The fixed roof and its closure devices
must be designed to form a continuous barrier over the entire surface area of
the liquid in the tank;
B) Each
opening in the fixed roof not vented to the control device must be equipped
with a closure device. If the pressure in the vapor headspace underneath the
fixed roof is less than atmospheric pressure when the control device is
operating, the closure devices must be designed to operate so that when the
closure device is secured in the closed position there are no visible cracks,
holes, gaps, or other open spaces in the closure device or between the
perimeter of the cover opening and the closure device. If the pressure in the
vapor headspace underneath the fixed roof is equal to or greater than
atmospheric pressure when the control device is operating, the closure device
must be designed to operate with no detectable organic emissions;
C) The fixed roof and its closure devices
must be made of suitable materials that will minimize exposure of the hazardous
waste to the atmosphere, to the extent practical, and will maintain the
integrity of the fixed roof and closure devices throughout their intended
service life. Factors to be considered when selecting the materials for and
designing the fixed roof and closure devices must include the following:
organic vapor permeability; the effects of any contact with the liquid and its
vapor managed in the tank; the effects of outdoor exposure to wind, moisture,
and sunlight; and the operating practices used for the tank on which the fixed
roof is installed; and
D) The
closed-vent system and control device must be designed and operated in
accordance with the requirements of Section
725.988.
2) Whenever a hazardous waste is
in the tank, the fixed roof must be installed with each closure device secured
in the closed position and the vapor headspace underneath the fixed roof vented
to the control device except as follows:
A)
Venting to the control device is not required, and opening of closure devices
or removal of the fixed roof is allowed at the following times:
i) To provide access to the tank for
performing routine inspection, maintenance, or other activities needed for
normal operations. Examples of such activities include those times when a
worker needs to open a port to sample liquid in the tank, or when a worker
needs to open a hatch to maintain or repair equipment. Following completion of
the activity, the owner or operator must promptly secure the closure device in
the closed position or reinstall the cover, as applicable, to the tank;
and
ii) To remove accumulated
sludge or other residues from the bottom of a tank; and
B) Opening of a safety device, as defined in
Section 725.981, is allowed at any time conditions require doing so to avoid an
unsafe condition.
3) The
owner or operator must inspect and monitor the air emission control equipment
in accordance with the following procedures:
A) The fixed roof and its closure devices
must be visually inspected by the owner or operator to check for defects that
could result in air pollutant emissions. Defects include, but are not limited
to any of the following: visible cracks, holes, or gaps in the roof sections or
between the roof and the tank wall; broken, cracked, or otherwise damaged seals
or gaskets on closure devices; and broken or missing hatches, access covers,
caps, or other closure devices;
B)
The closed-vent system and control device must be inspected and monitored by
the owner or operator in accordance with the procedures specified in Section
725.988;
C) The owner or operator
must perform an initial inspection of the air emission control equipment on or
before the date that the tank becomes subject to this Section. Thereafter, the
owner or operator must perform the inspections at least once every year except
for the special conditions provided for in subsection (l);
D) In the event that a defect is detected,
the owner or operator must repair the defect in accordance with the
requirements of subsection (k); and
E) The owner or operator must maintain a
record of the inspection in accordance with the requirements specified in
Section
725.990(b).
h) The owner
or operator that controls air pollutant emissions by using a pressure tank must
meet the following requirements:
1) The tank
must be designed not to vent to the atmosphere as a result of compression of
the vapor headspace in the tank during filling of the tank to its design
capacity;
2) All tank openings must
be equipped with closure devices designed to operate with no detectable organic
emissions as determined using the procedure specified in Section
725.984(d);
and
3) Whenever a hazardous waste
is in the tank, the tank must be operated as a closed-vent system that does not
vent to the atmosphere, except under either of the following two conditions:
A) The tank does not need to be operated as a
closed-vent system at those times when the opening of a safety device, as
defined in Section 725.981, is required to avoid an unsafe condition;
and
B) The tank does not need to be
operated as a closed-vent system at those times when the purging of inerts from
the tank is required and the purge stream is routed to a closed-vent system and
control device designed and operated in accordance with the requirements of
Section 725.988.
i) The owner or operator that controls air
pollutant emissions by using an enclosure vented through a closed-vent system
to an enclosed combustion control device must meet the requirements specified
in subsections (i)(1) through (i)(4).
1) The
tank must be located inside an enclosure. The enclosure must be designed and
operated in accordance with the criteria for a permanent total enclosure, as
specified in "Procedure T - Criteria for and Verification of a Permanent or
Temporary Total Enclosure" under appendix B to
40
CFR 52.741 (VOM Measurement Techniques for
Capture Efficiency), incorporated by reference in 35 Ill. Adm. Code
720.111(b).
The enclosure may have permanent or temporary openings to allow worker access;
passage of material into or out of the enclosure by conveyor, vehicles, or
other mechanical means; entry of permanent mechanical or electrical equipment;
or direct airflow into the enclosure. The owner or operator must perform the
verification procedure for the enclosure as specified in Section 5.0 of
"Procedure T - Criteria for and Verification of a Permanent or Temporary Total
Enclosure" initially when the enclosure is first installed and, thereafter,
annually;
2) The enclosure must be
vented through a closed-vent system to an enclosed combustion control device
that is designed and operated in accordance with the standards for either a
vapor incinerator, boiler, or process heater specified in Section
725.988;
3) Safety devices, as
defined in Section 725.981, may be installed and operated as necessary on any
enclosure, closed-vent system, or control device used to comply with the
requirements of subsections (i)(1) and (i)(2); and
4) The owner or operator must inspect and
monitor the closed-vent system and control device, as specified in Section
725.988.
j) The owner or
operator must transfer hazardous waste to a tank subject to this Section in
accordance with the following requirements:
1) Transfer of hazardous waste, except as
provided in subsection (j)(2), to the tank from another tank subject to this
Section or from a surface impoundment subject to Section
725.986
must be conducted using continuous hard-piping or another closed system that
does not allow exposure of the hazardous waste to the atmosphere. For the
purpose of complying with this provision, an individual drain system is
considered to be a closed system when it meets the requirements of subpart RR
of 40 CFR
63(National Emission
Standards for Individual Drain Systems), incorporated by reference in 35 Ill.
Adm. Code
720.111(b);
and
2) The requirements of
subsection (j)(1) do not apply when transferring a hazardous waste to the tank
under any of the following conditions:
A) The
hazardous waste meets the average VO concentration conditions specified in
Section
725.983(c)(1)
at the point of waste origination;
B) The hazardous waste has been treated by an
organic destruction or removal process to meet the requirements in Section
725.983(c)(2);
and
C) The hazardous waste meets
the requirements of Section
725.983(c)(4).
k) The owner or
operator must repair each defect detected during an inspection performed in
accordance with the requirements of subsection (c)(4), (e)(3), (f)(3), or
(g)(3) as follows:
1) The owner or operator
must make first efforts at repair of the defect no later than five calendar
days after detection, and repair must be completed as soon as possible but no
later than 45 calendar days after detection except as provided in subsection
(k)(2); and
2) Repair of a defect
may be delayed beyond 45 calendar days if the owner or operator determines that
repair of the defect requires emptying or temporary removal from service of the
tank and no alternative tank capacity is available at the site to accept the
hazardous waste normally managed in the tank. In this case, the owner or
operator must repair the defect the next time the process or unit that is
generating the hazardous waste managed in the tank stops operation. Repair of
the defect must be completed before the process or unit resumes
operation.
l) Following
the initial inspection and monitoring of the cover as required by the
applicable provisions of this Subpart CC, subsequent inspection and monitoring
may be performed at intervals longer than one year under the following special
conditions:
1) Where inspecting or monitoring
the cover would expose a worker to dangerous, hazardous, or other unsafe
conditions, then the owner or operator may designate a cover as an "unsafe to
inspect and monitor cover" and comply with all of the following requirements:
A) Prepare a written explanation for the
cover stating the reasons why the cover is unsafe to visually inspect or to
monitor, if required; and
B)
Develop and implement a written plan and schedule to inspect and monitor the
cover, using the procedures specified in the applicable Section of this Subpart
CC, as frequently as practicable during those times when a worker can safely
access the cover; and
2)
If a tank is buried partially or entirely underground, an owner or operator is
required to inspect and monitor, as required by the applicable provisions of
this Section, only those portions of the tank cover and those connections to
the tank (e.g., fill ports, access hatches, gauge wells, etc.) that are located
on or above the ground surface.
Notes
Amended at 37 Ill. Reg. 17811, effective October 24, 2013
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