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Federal Register / Vol. 86, No. 117 / Tuesday, June 22, 2021 / Proposed Rules
months of May to September.46 47 We propose to find that the revisions to Section XII.H. strengthen the SIP and meet CAA requirements.

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v Section XII.J.
Section XII.J. contains new provisions for centrifugal and reciprocating compressors. Section XII.J.1.a. requires that by January 2, 2018, VOC emissions from wet seal fluid degassing systems on wet seal centrifugal compressors located between the wellhead and the point of custody transfer to the natural gas transmission and storage segment must be reduced by at least 95%.
Section XII.J.1.b. requires wet seal fluid degassing systems to be equipped with continuous, impermeable covers that are connected through a closed vent system that routes emissions from the wet seal fluid degassing system to the process or control device. Section XII.J.1.c.
requires annual visual inspections of the cover and closed vent systems for defects that could result in air emissions.
Under Section XII.J.1.d., owners or operators must conduct annual EPA
Method 21 inspections of covers and closed vent systems to determine whether they operate with VOC
emissions less than 500 ppm. Section XII.J.1.e. requires first attempts at repair to occur no later than five days after detecting defects or leaks, and repairs to be completed no later than 30 days after detection. Section XII.J.1.f. sets forth criteria for delaying inspection or repair due to unsafe conditions and accessibility issues. Owners or operators are required to maintain records of each cover or closed vent system that is unsafe or difficult to inspect and schedule for inspection when circumstances allow.
Section XII.J.1.h. includes recordkeeping requirements to demonstrate compliance with Section XII.J.1. Owners and operators must maintain records for a minimum of five years. As an alternative to the inspection, repair, and recordkeeping provisions, owners and operators may inspect, repair, and document cover and closed vent systems in accordance with the LDAR program in Section XII.L.
Section XII.J.1.j. allows owners and 46 In October 2015, the EPA finalized a revision to the ozone NAAQS that revised the length of Colorados ozone season to year-round Final rule, National Ambient Air Quality Standards for Ozone, 80 FR 65292 Oct. 26, 2015.
47 We are also approving a similar provision in Section XII.F.4. The provision applies to the system-wide control strategy for condensate storage tanks. In this action, we are proposing approval of the control strategy for individual storage tanks in new Part D, Section I.D. which replaces the systemwide strategy controls in Section XII.

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operators to comply with emissions, inspections, repair, and recordkeeping provisions of an NSPS including Subparts OOOO and OOOOa in lieu of Sections XII.J.1.a. through i.
Section XII.J.2. contains provisions for reciprocating compressors. Section XII.J.2.a. requires that the rod packing on reciprocating compressors located between the wellhead and the point of custody transfer to the natural gas transmission and storage segment be replaced every 26,000 hours of operation or every 36 months. Under Section XII.J.2.a., owners or operators of existing reciprocating compressors at natural gas processing plants were required to begin monitoring the reciprocating compressor hours of operation on January 1, 2018 and conduct the first rod packing replacement before January 1, 2021, or route emissions to a process beginning May 1, 2018.
Section XII.J.2.b. allows owners or operators the option to reduce VOC
emissions by routing reciprocating compressor emissions using a rod packing emissions collection system that operates under negative pressure and routes the rod packing emissions through a closed vent system to a process. Owners and operators must conduct annual visual inspections of the cover and closed vent systems for defects that could result in air emissions. Section XII.J.2.b.ii requires owners and operators to conduct annual EPA Method 21 inspections of the cover and closed vent system to determine whether they operate with VOC
emissions less than 500 ppm. Section XII.2.e. allows owners and operators to comply with emissions, inspections, repair, and recordkeeping provisions of an NSPS in lieu of Sections XII.J.2.a.
through d.
First attempts at repair must be made within five days of discovery, and repairs must be completed within 30
days unless one of the justifications for delay of repair in Section XII.J.2.b.iv applies. Owners or operators may delay subsequent repair attempts of equipment where, during a scheduled shutdown, the owner or operator unsuccessfully repaired the leak requiring repair if repair is completed within two years of discovery. Delayed inspection or repairs of the closed vent system may occur under certain safety, accessibility, and feasibility circumstances described in Sections XII.J.2.b.ivA through D.
Section XII.J.2.c. includes recordkeeping requirements to demonstrate compliance with Section XII.J.2. Owners and operators must maintain records for a minimum of five
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years. As an alternative to the inspection, repair, and recordkeeping provisions, Section XII.J.2.d. allows owners and operators to inspect, repair, and document cover and closed vent systems in accordance with the LDAR
program in Section XII.L. Section XII.J.2.e. allows owners and operators to comply with emissions, inspections, repair, and recordkeeping provisions of an NSPS, including Subparts OOOO
and OOOOa.
We propose to find that the provisions in the new Section XII.J. strengthen the SIP and meet CAA and RACT
requirements.
vi Section XII.K
Section XII.K adds requirements for pneumatic pumps. Section XII.K.1
requires that natural gas-driven diaphragm pneumatic pumps at natural gas processing plants have a VOC
compound emissions rate of zero.
Section XII.K.2. establishes a May 1, 2018 effective date for owners or operators to reduce emissions from natural gas-driven diaphragm pneumatic pumps at well production facilities by 95% within 30 days of startup of the control device or route emissions to a process at the well production facility. Pneumatic pump emissions must be routed to the existing control device even if is unable to achieve a 95% emission reduction if it is technically infeasible to route emissions to a process. Section XII.K.2.b. requires a 95% reduction from pneumatic pumps within 30 days of startup upon installation of a control device or once routing emissions to a process becomes technically feasible.
Pneumatic pump emissions are exempt from controls if an engineering assessment by a qualified professional engineer determines that routing a pneumatic pump to a control device or process is technically infeasible.
Pneumatic pumps routing emissions to the process or control device must connect through a closed vent system.
Sections XII.K.2.e. through h. require annual visual and EPA Method 21
inspections of the closed vent system.
First attempts at repairs must be made within five days of discovery, and repairs must be completed within 30
days unless one of the justifications for delay of repair in Sections XII.K.2.h.
applies. Delayed inspection or repairs of the closed vent system may occur under certain safety, accessibility, and feasibility circumstances described in Sections XII.K.2.h.i through iv.
Section XII.K.3. includes recordkeeping requirements to demonstrate compliance with Section XII.K. Owners and operators must
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