NSPS Notebook
Onshore Natural Gas Processing: SO2 Emissions -  Subpart LLL

Applicability: eCFR Subpart LLL [ecfr.gov]

This subpart applies to:
  1. Sweetening units and sweetening units followed by a sulfur recovery units that commence construction or modification after January 20, 1984 and on or before August 23, 2011.
Those that commence construction after August 23, 2011 are subject to NSPS OOOO.

Onshore facilities that process natural gas from either onshore or offshore wells are subject to this subpart.

Facilities with a design capacity < 2 long tons/day (LT/D) of hydrogen sulfide (H2S) in the acid gas (expressed as sulfur) are required to comply only with the recordkeeping requirements of this subpart.

Not subject to subpart:
  1. Sweetening facilities producing acid gas that is completely reinjected into oil-or-gas-bearing geologic strata or that is otherwise not released to the atmosphere.
Known Sources in NDEE Jurisdiction:
Date of Original Final Rule: 10/1/85
Amendments Dates: 08/16/2012 (49490)
10/17/2000 (65 FR 61744)
2/14/1989 (54 FR 6679)
State Regulations: Title 129, Chapter 12, Section 001.64

Previously: Chapter 18, Section 001.34
Federal Regulations: 40 CFR 60.640
Related Rules:

NSPS - 40 CFR Part 60

Subparts VV and VVa - VOC equipment leaks
Subparts GGG and GGGa - Equipment Leaks at Refineries
Subpart KKK - VOC - leaks at onshore natural gas processing plant
Subpart OOOO - Natural gas processing plants

NESHAP - 40 CFR Part 63
Subpart HH - Oil and natural gas production
Subpart HHH - Natural gas transmissions and storage facilities
Regulations and Federal Registers: eCFR Subpart LLL [ecfr.gov]

(See attached file: 3K-3L-4O - Fed. Reg. 2012-08-16 - Final Rule.pdf)

(See attached file: 3K-3L-4O - Fed. Reg. 2011-08-23 - Proposed Rule.pdf)

SizeFile Name
1,046 KB 3K-3L-4O - Fed. Reg. 2012-08-16 - Final Rule.pdf
772 KB 3K-3L-4O - Fed. Reg. 2011-08-23 - Proposed Rule.pdf
FAQs, Fact Sheets, and Rule Summaries: TCEQ Flowchart [tceq.state.tx.us]
Other Information and Resources:
Page Last Updated: 12/21/22