Current through Register Vol. 48, No. 38, September 20, 2024
a) Every
owner or operator of a source subject to the requirements of this Subpart, as
determined by Section
218.431 of this
Subpart, shall either:
1) Reduce emissions of
VOM, less methane or ethane, by 98 weight-percent, or to 20 ppmv, on a dry
basis, corrected to 3 percent oxygen, whichever is less stringent;
2) If a boiler or process heater is used to
comply with this Subpart, the vent stream shall be introduced into the flame
zone of the boiler or process heater; or
3) If a flare is used to comply with this
Subpart it shall comply with the requirements of
40 CFR
60.18, incorporated by reference at Section
218.112
of this Part. The flare operation requirements of
40 CFR
60.18 do not apply if a process, not subject
to this Subpart, vents an emergency relief discharge into a common flare header
and causes the flare servicing the process subject to this Subpart to not
comply with one or more of the provisions of
40 CFR
60.18.
b) Notwithstanding subsection (a) or (c) of
this Section, and subject to subsection (b)(2) of this Section:
1) No owner or operator of a source subject
to Section
218.432 of
this Subpart shall cause or allow VOM to be emitted through an existing control
device unless the control device is operated to achieve:
A) 90 percent control of the VOM emissions
vented to it; or
B) VOM emissions
concentration of less than 50 ppmv, on a dry basis.
2) Any existing control device subject to
subsection (a) of this Section is required to meet the 98 percent emissions
limit set forth in subsection (a)(1) upon the earlier to occur of the date the
control device is replaced for any reason, including, but not limited to,
normal maintenance, malfunction, accident, and obsolescence, or December 31,
1999. A control device is considered to be replaced when:
A) All of the device is replaced;
or
B) When the cost to repair the
device or the cost to replace part of the device exceeds 50 percent of the cost
of replacing the entire device with a device that complies with the 98%
emissions limitation in subsection (a)(1) of this Section.
c) For each individual vent stream
within a chemical manufacturing process unit with a TRE index value greater
than 1.0, the owner or operator shall maintain process vent stream parameters
that retain a calculated TRE index value greater than 1.0 by means of recovery.
Any recovery device shall have as its primary purpose the capture of chemicals
for use, reuse, or sale. The TRE index value shall be calculated at the outlet
of the final recovery device.
