Utah Admin. Code R307-506-4 - Storage Vessel Requirements
(1) Thief
hatches on storage vessels shall be kept closed and latched except during
vessel unloading or other maintenance activities.
(2) All storage vessels located at a well
site that are in operation as of January 1, 2018, with a site-wide throughput
of 8,000 barrels or greater of crude oil or 2,000 barrels or greater of
condensate per year on a rolling 12-month basis shall comply with
R307-506-4(2)(a) unless the exemption in R307-506-4(2)(b) applies.
(a) VOC emissions from storage vessels shall
either be routed to a process unit where the emissions are recycled,
incorporated into a product and/or recovered, or be routed to a VOC control
device that is in compliance with R307-508.
(b) All storage vessels located at a well
site shall be exempt from R307-506-4(2) (a) if combined VOC emissions are
demonstrated to be less than four tons per year of uncontrolled emissions on a
rolling 12-month basis.
(i) VOC working and
breathing losses, and flash emissions shall be calculated using direct
site-specific sampling data and any software program or calculation methodology
in use by industry that is based on AP-42 Chapter 7.
(3)All storage vessels that begin
operations on or after January 1, 2018, are required to control VOC emissions
in accordance with R307-506-4(2)(a) upon startup of operation for a minimum of
one year.
(4) An emergency storage
vessel located at a well site shall be exempt from R307-506-4(2)(a), if it
meets the following requirements:
(i) The
emergency storage vessel shall not be used as an active storage tank.
(ii) The owner or operator shall empty the
emergency storage vessel no later than 15 days after receiving
fluids.
(iii) The emergency storage
vessel shall be equipped with a liquid level gauge or equivalent device.
(5) An owner or
operator that is required to control emissions in accordance with R307-506-4(2)
and R307-506-4(3) shall inspect at least once a month each closed vent system,
including vessel openings, thief hatches, and bypass devices, for defects that
can result in air emissions according to
40
CFR 60.5416a(c).
(a) If defects are discovered, the defects
shall be corrected or repaired within 15 days of identification.
(6) Modification to a
well site shall require a re-evaluation of site-wide throughput and/or
emissions in accordance with R307-506-4(2).
(7) After a minimum of one year of operation,
controls may be removed if site-wide throughput is less than 8,000 barrels of
crude oil or 2,000 barrels of condensate on a rolling 12-month basis or
uncontrolled actual emissions are demonstrated to be less than four tons per
year[ ].
Notes
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