(a) Owners or operators of centrifugal compressors
with wet seal fluid degassing systems must comply with the following
requirements.
(1) Vapors must be routed from the wet seal fluid degassing
system through a closed vent system that is designed and operated
under normal operations to route all gases, vapors, and/or fumes from
the wet seal fluid degassing system to a control device that meets
the requirements of subsection (c) of this section. The closed vent
system must operate under negative pressure at the inlet for vapors.
(2) The compressor must be equipped with a seal cover
that forms a continuous impermeable barrier over the entire liquid
surface area, and the cover must remain in a sealed position (e.g.,
covered by a gasketed lid or cap) except during periods necessary
to inspect, maintain, repair, or replace equipment.
(b) Owners or operators of reciprocating compressors
must comply with paragraph (1), (2) or (3) of this subsection.
(1) Replace the compressor rod packing on or before
the compressor has operated for 26,000 hours from the most recent
rod packing replacement. The number of hours the compressor operates
must be continuously recorded beginning on the appropriate compliance
date in §115.183 of this title (relating to Compliance Schedule).
(2) Replace the compressor rod packing within 36 months
from the most recent rod packing replacement beginning from the appropriate
compliance date in §115.183 of this title.
(3) Operate a closed vent system under negative inlet
pressure that captures and routes rod packing vapor to a control device
that meets the requirements of subsection (c) of this section.
(c) A control device, other than a device specified
in paragraphs (3) or (4) of this subsection, may be used and must
maintain a VOC control efficiency of at least 95% or a VOC concentration
of equal to or less than 275 parts per million by volume (ppmv), as
propane, on a wet basis corrected to 3% oxygen. The 95% VOC control
efficiency and 275 ppmv VOC concentration are calculated from the
gas stream at the control device outlet.
(1) The control device must be operated at all times
when gases, vapors, or fumes are vented from the closed vent system
to the control device. For a boiler or process heater used as the
control device, the vent gas stream must be introduced into the flame
zone of the boiler or process heater. Multiple vents may be routed
to the same control device. Control devices and closed vent systems
must comply with §115.178 of this title (relating to Monitoring
and Inspection Requirements) and §115.179 of this title (relating
to Approved Test Methods and Testing Requirements).
(2) Control devices must operate with no visible emissions,
as determined through a visible emissions test conducted according
to United States Environmental Protection Agency (EPA) Method 22,
40 Code of Federal Regulations (CFR) Part 60, Appendix A-7, Section
11, except for periods not to exceed a total of one minute during
any 15-minute observation period.
(3) A flare may be used and must be designed and operated
in accordance with 40 CFR §60.18(b) - (f) (as amended through
December 22, 2008 (73 Federal Register (FR)
78209)). The flare must be lit at all times when VOC vapors are routed
to the flare. Multiple vents may be routed to the same control device.
(4) VOC emissions may be routed to a process if the
emissions are compatible with the process and would be retained within
the process. Routing to a process is considered equivalent to a 95%
control efficiency.
(5) A bypass installed on a closed vent system able
to divert any portion of the flow from entering a control device or
routing to a process must be in compliance with subparagraphs (A)
or (B) of this paragraph.
(A) A flow indicator must be installed, calibrated,
and maintained at the inlet of each bypass. The flow indicator must
take a reading at least once every 15 minutes and initiate an alarm
notifying operators to take prompt remedial action when bypass flows
are present.
(B) Each bypass valve must be secured in the non-diverting
position using a car-seal or a lock-and-key type configuration.
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