| (A) continuously monitor the exhaust gas VOC concentration
of a carbon adsorption system that regenerates the carbon bed directly
to determine breakthrough, which for the purpose of this paragraph,
is defined as a measured VOC concentration exceeding 100 ppmv above
background expressed as methane; or
(B) switch the vent gas flow to fresh carbon at a regular
predetermined time interval for a carbon adsorber or carbon adsorption
system that does not regenerate the carbon directly. The time interval
must be less than the carbon replacement interval determined by the
maximum design flow rate and the VOC concentration in the gas stream
vented to the carbon adsorption system or carbon adsorber.
(4) For a catalytic incinerator, the owner or operator
shall continuously monitor the inlet and outlet gas temperature.
(5) For a vapor recovery unit, the owner or operator
shall continuously monitor at least one of the following operational
parameters:
(A) run-time of the compressor or motor in a vapor
recovery unit;
(B) total volume of recovered vapors; or
(C) other parameters sufficient to demonstrate proper
functioning to design specifications.
(6) For a control device not listed in this subsection,
the owner or operator shall continuously monitor one or more operational
parameters sufficient to demonstrate proper functioning of the control
device to design specifications.
(g) The following inspection requirements apply to
storage tanks subject to the control requirements in this division.
(1) For an internal floating roof storage tank, the
internal floating roof and the primary seal and the secondary seal
(if one is in service) must be visually inspected through a fixed
roof inspection hatch at least once every 12 months.
(A) If the internal floating roof is not resting on
the surface of the VOC inside the storage tank and is not resting
on the leg supports; if liquid has accumulated on the internal floating
roof; if the seal is detached; if there are holes or tears in the
seal fabric; or if there are visible gaps between the seal and the
wall of the storage tank, within 60 days of the inspection the owner
or operator shall repair the items or shall empty and degas the storage
tank in accordance with Subchapter F, Division 3 of this chapter (relating
to Degassing of Storage Tanks, Transport Vessels, and Marine Vessels).
(B) If a failure identified in subparagraph (A) of
this paragraph cannot be repaired within 60 days and the storage tank
cannot be emptied within 60 days, the owner or operator may submit
written requests for up to two extensions of up to 30 additional days
each to the appropriate regional office. The owner or operator shall
submit a copy to any local air pollution control program with jurisdiction.
Each request for an extension must include a statement that alternate
storage capacity is unavailable and a schedule that will assure that
the repairs will be completed as soon as possible.
(2) For an external floating roof storage tank, the
secondary seal gap must be physically measured at least once every
12 months to ensure compliance with §115.175 this title (relating
to Storage Tank Control Requirements).
(A) If the secondary seal gap exceeds the limitations
specified by §115.175(d) of this title, within 60 days of the
inspection the owner or operator shall repair the items or shall empty
and degas the storage tank in accordance with Subchapter F, Division
3 of this chapter.
(B) If a failure identified in subparagraph (A) of
this paragraph cannot be repaired within 60 days and the storage tank
cannot be emptied within 60 days, the owner or operator may submit
written requests for up to two extensions of up to 30 additional days
each to the appropriate regional office. The owner or operator shall
submit a copy to any local air pollution control program with jurisdiction.
Each request for an extension must include a statement that alternate
storage capacity is unavailable and a schedule that will assure that
the repairs will be completed as soon as possible.
(3) If the storage tank is equipped with a mechanical
shoe or liquid-mounted primary seal, compliance with §115.175
of this title can be determined by visual inspection.
(4) For an external floating roof storage tank, the
secondary seal must be visually inspected at least once every six
months to ensure compliance with §115.175 of this title.
(A) If the external floating roof is not resting on
the surface of the VOC inside the storage tank and is not resting
on the leg supports; if liquid has accumulated on the external floating
roof; if the seal is detached; if there are holes or tears in the
seal fabric; or if there are visible gaps between the seal and the
wall of the storage tank, within 60 days of the inspection the owner
or operator shall repair the items or shall empty and degas the storage
tank in accordance with Subchapter F, Division 3 of this chapter.
(B) If a failure identified in subparagraph (A) of
this paragraph cannot be repaired within 60 days and the storage tank
cannot be emptied within 60 days, the owner or operator may submit
written requests for up to two extensions of up to 30 additional days
each to the appropriate regional office. The owner or operator shall
submit a copy to any local air pollution control program with jurisdiction.
Each request for an extension must include a statement that alternate
storage capacity is unavailable and a schedule that will assure that
the repairs will be completed as soon as possible.
(5) The owner or operator shall conduct an audio, visual,
and olfactory inspection at least once per month, separated by at
least 14 calendar days, of a control device used to control the VOC
emissions from a storage tank.
(6) The owner or operator shall inspect and repair
all closure devices not connected to a control device according to
the schedule in this paragraph.
(A) The owner or operator shall conduct an audio, visual,
and olfactory inspection of each closure device not connected to a
vapor recovery unit or other vapor control device to ensure compliance
with §115.175(a)(1)(A) of this title. The inspection must occur
when liquids are not being added to or unloaded from the tank. If
the owner or operator finds the closure device open for reasons not
allowed in §115.175(a)(1)(A) of this title, the owner or operator
shall attempt to close the device during the inspection. The inspection
must occur before the end of one business day after each opening of
a thief or access hatch for sampling or gauging, and before the end
of one business day after each unloading event. If multiple events
occur on a single day, a single inspection within one business day
after the last event is sufficient.
(B) Once per calendar quarter, the owner or operator
shall conduct an audio, visual, and olfactory inspection of all gaskets
and vapor sealing surfaces of each closure device not connected to
a vapor recovery unit or other control device to ensure compliance
with §115.175(a)(1)(B) of this title. If an improperly sealed
closure device is found, the owner or operator shall follow repair
requirements in accordance with §115.175(a)(1)(D) of this title.
For the purpose of this subparagraph, a repair is complete if the
closure device no longer exudes process gasses based on audio, visual,
and olfactory means.
(h) This section does not apply to fugitive emission
components required to comply with §115.177 of this title (relating
to Fugitive Emission Component Requirements).
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