Subpart X – Petrochemical Production

This page provides resources for subpart X reporters, including implementation information as well as supporting documents for relevant rulemakings.

Summary

Petrochemical production consists of each process that produces acrylonitrile (CH2CHCN), carbon black (C), ethylene (C2H4), ethylene dichloride (C2H4Cl2), ethylene oxide (C2H4O), or methanol (CH3OH), except the following are excluded from the petrochemical production source category:

  • Processes that produce a petrochemical as a byproduct.
  • A direct chlorination process that is operated independently of an oxychlorination process to produce C2H4Cl2.
  • A facility that makes CH3OH, hydrogen (H), and/or ammonia (NH3) from synthesis gas if the annual mass production of either H recovered as product or NH3 exceeds the annual mass production of CH3OH.
  • Processes that produce bone black.
  • Processes that produce a petrochemical from biobased feedstock.

Reporter Resources

Subpart X Regulatory History

40 CFR Part 98.240
Federal Register DateCitationActionDescription
12/09/201681 FR 89188Final RuleRevises 29 subparts to streamline implementation, improve data quality, provide flexibility, and clarify the rule. Establishes confidentiality determinations for new or substantially revised data elements. Final action in response to a Petition for Reconsideration.
Final Preamble and Rule (12/2016) (pdf) (87 pp, 801 KB)
Response to Comments (12/2016)
Fact Sheet: 2015 Revisions and Confidentiality Determinations (pdf) (209.54 KB, Nov 2016)
Memo: Table of Final 2015 Revisions to the Greenhouse Gas Reporting Rule
Proposed Preamble and Rule (1/15/2016) (pdf) (91 pp, 890 KB)
10/24/201479 FR 63750Final RuleAmends reporting and recordkeeping requirements and establishes an alternative electronic verification approach for 23 subparts to address concerns regarding public disclosure of business sensitive information while maintaining EPA’s ability to verify emissions and ensure compliance.
Final Preamble and Rule (10/2014) (pdf) (51 pp, 633 KB)
Response to Comments (10/2014)
Fact Sheet: Revisions to Reporting and Recordkeeping Requirements and Final Confidentiality Determinations under the Greenhouse Gas Reporting Program (pdf) (40.52 KB, Sep 2014)
Proposed Preamble and Rule (9/11/2013) (pdf) (31 pp, 550 KB)
Memorandum: Final Data Elements Deferred to March 31, 2015, List of ‘Inputs to Equations’ Data Elements Not To Be Reported (pdf) (560.53 KB, Sep 2014)
More Information on 10/2014 Rule
11/29/201378 FR 71904Final RuleUpdates global warming potentials (GWPs) to reflect IPCC AR4 values, and amends 27 subparts to improve and clarify reporting requirements. Establishes confidentiality determinations for new and revised data elements.
Final Preamble and Rule (11/2013) (pdf) (79 pp, 935K)
Correction Notice (11/2013) (pdf) (2 pp, 248 KB)
Response to Comments (11/2013)
Fact Sheet: 2013 Revisions and Confidentiality Determinations (pdf) (37.58 KB, Nov 2013)
Memorandum: Table of Final 2013 Revisions to the Greenhouse Gas Reporting Rule (pdf) (1.02 MB, Sept 2013)
Proposed Preamble and Rule (4/2/2013) (pdf) (77 pp, 909 KB)
05/26/201176 FR 30782Final RuleFinalizes confidentiality determinations for 34 subparts for data elements that are not inputs to emissions equations. Finalizes amendments to 40 CFR 2 governing CBI obtained under 40 CFR 98.
Final Preamble and Rule (5/2011) (pdf) (37 pp, 330 KB)
Correction Notice (10/2011) (pdf) (6 pp, 167 KB)
Response to Comments (5/2011)
Fact Sheet: Final Confidentiality Determinations for Data Collected Under the Greenhouse Gas Reporting Program and Amendments to Special Rules Governing Certain Information Obtained Under the Clean Air Act (pdf) (43.28 KB, May 2011)
Final Data Category Assignments and Confidentiality Determinations for Part 98 Reporting Elements (pdf) (1.76 MB)
Proposed Preamble and Rule (7/27/2010) (pdf) (4 pp, 164 KB)
Proposed Preamble and Rule (7/07/2010) (pdf) (40 pp, 366 KB)
CBI Powerpoint Presentation (pdf) (95.58 KB)
12/17/201075 FR 79092Final RuleCorrects technical and editorial errors, and clarifies rule provisions for subparts A, C, D, F, G, P, V, X, Y, AA, NN, OO and PP.
Final Preamble and Rule (12/2010) (pdf) (81 pp, 667 KB)
Response to Comments (12/2010)
Fact Sheet: Revisions of Certain Provisions of the Mandatory Reporting of Greenhouse Gases Rule (pdf) (97.8 KB, Nov 2010)
Proposed Preamble and Rule (8/11/2010) (pdf) (72 pp, 478 KB)
More Information on 12/2010 Final Rule
10/30/200974 FR 56260Final RuleFinalizes the first 30 subparts of 40 CFR Part 98, comprising subparts A, C, D, E, F, G, H, K, N, O, P, Q, R, S, U, V, X, Y, Z, AA, BB, CC, EE, GG, HH, JJ, LL, MM, NN, OO, and PP.
Final Preamble and Rule (pdf) (260 pp, 1.4 MB)
Response to Public Comments- Subpart X (pdf) (212.21 KB, 09/2009)
Regulatory Impact Analysis for the Mandatory Reporting of Greenhouse Gas Emissions Final Rule (pdf) (1.32 MB)
Subpart X Technical Support Document- Petrochemical Production (pdf) (146 KB, 09/09/2008)
Proposed Mandatory Reporting of Greenhouse Gases Rule (pdf) (3.03 MB)
Proposed Mandatory Reporting of Greenhouse Gases Preamble (pdf) (3.71 MB)

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Last updated on June 6, 2025