{"data":{"id":"us/40-cfr-appendix-to-subpart-hh-of-part-63","jurisdiction":"us","citation":"40 CFR Appendix to Subpart HH of Part 63","heading":"Appendix to Subpart HH of Part 63—Tables","body":"Table 1 to Subpart HH of Part 63—List of Hazardous Air Pollutants for Subpart HH\nCAS Number a Chemical name\n75070 Acetaldehyde\n71432 Benzene (includes benzene in gasoline)\n75150 Carbon disulfide\n463581 Carbonyl sulfide\n100414 Ethyl benzene\n107211 Ethylene glycol\n50000 Formaldehyde\n110543 n-Hexane\n91203 Naphthalene\n108883 Toluene\n540841 2,2,4-Trimethylpentane\n1330207 Xylenes (isomers and mixture)\n95476 o-Xylene\n108383 m-Xylene\n106423 p-Xylene\na CAS numbers refer to the Chemical Abstracts Services registry number assigned to specific compounds, isomers, or mixtures of compounds.\nTable 2 to Subpart HH of Part 63—Applicability of 40 CFR Part 63 General Provisions to Subpart HH\nGeneral provisions reference Applicable to subpart HH Explanation\n§ 63.1(a)(1) Yes.\n§ 63.1(a)(2) Yes.\n§ 63.1(a)(3) Yes.\n§ 63.1(a)(4) Yes.\n§ 63.1(a)(5) No Section reserved.\n§ 63.1(a)(6) Yes.\n§ 63.1(a)(7) through (a)(9) No Section reserved.\n§ 63.1(a)(10) Yes.\n§ 63.1(a)(11) Yes.\n§ 63.1(a)(12) Yes.\n§ 63.1(b)(1) No Subpart HH specifies applicability.\n§ 63.1(b)(2) No Section reserved.\n§ 63.1(b)(3) Yes.\n§ 63.1(c)(1) No Subpart HH specifies applicability.\n§ 63.1(c)(2) Yes Subpart HH exempts area sources from the requirement to obtain a Title V permit unless otherwise required by law as specified in § 63.760(h).\n§ 63.1(c)(3) and (c)(4) No Section reserved.\n§ 63.1(c)(5) Yes.\n§ 63.1(c)(6) Yes\n§ 63.1(d) No Section reserved.\n§ 63.1(e) Yes.\n§ 63.2 Yes Except definition of major source is unique for this source category and there are additional definitions in subpart HH.\n§ 63.3(a) through (c) Yes.\n§ 63.4(a)(1) through (a)(2) Yes.\n§ 63.4(a)(3) through (a)(5) No Section reserved.\n§ 63.4(b) Yes.\n§ 63.4(c) Yes.\n§ 63.5(a)(1) Yes.\n§ 63.5(a)(2) Yes.\n§ 63.5(b)(1) Yes.\n§ 63.5(b)(2) No Section reserved.\n§ 63.5(b)(3) Yes.\n§ 63.5(b)(4) Yes.\n§ 63.5(b)(5) No Section Reserved.\n§ 63.5(b)(6) Yes.\n§ 63.5(c) No Section reserved.\n§ 63.5(d)(1) Yes.\n§ 63.5(d)(2) Yes.\n§ 63.5(d)(3) Yes.\n§ 63.5(d)(4) Yes.\n§ 63.5(e) Yes.\n§ 63.5(f)(1) Yes.\n§ 63.5(f)(2) Yes.\n§ 63.6(a) Yes.\n§ 63.6(b)(1) Yes.\n§ 63.6(b)(2) Yes.\n§ 63.6(b)(3) Yes.\n§ 63.6(b)(4) Yes.\n§ 63.6(b)(5) Yes.\n§ 63.6(b)(6) No Section reserved.\n§ 63.6(b)(7) Yes.\n§ 63.6(c)(1) Yes.\n§ 63.6(c)(2) Yes.\n§ 63.6(c)(3) through (c)(4) No Section reserved.\n§ 63.6(c)(5) Yes.\n§ 63.6(d) No Section reserved.\n§ 63.6(e)(1)(i) No See § 63.764(j) for general duty requirement.\n§ 63.6(e)(1)(ii) No.\n§ 63.6(e)(1)(iii) Yes.\n§ 63.6(e)(2) No Section reserved.\n§ 63.6(e)(3) No.\n§ 63.6(f)(1) No.\n§ 63.6(f)(2) Yes.\n§ 63.6(f)(3) Yes.\n§ 63.6(g) Yes.\n§ 63.6(h)(1) No.\n§ 63.6(h)(2) through (h)(9) Yes.\n§ 63.6(i)(1) through (i)(14) Yes.\n§ 63.6(i)(15) No Section reserved.\n§ 63.6(i)(16) Yes.\n§ 63.6(j) Yes.\n§ 63.7(a)(1) Yes.\n§ 63.7(a)(2) Yes But the performance test results must be submitted within 180 days after the compliance date.\n§ 63.7(a)(3) Yes.\n§ 63.7(a)(4) Yes.\n§ 63.7(c) Yes.\n§ 63.7(d) Yes.\n§ 63.7(e)(1) No.\n§ 63.7(e)(2) Yes.\n§ 63.7(e)(3) Yes.\n§ 63.7(e)(4) Yes.\n§ 63.7(f) Yes.\n§ 63.7(g) Yes.\n§ 63.7(h) Yes.\n§ 63.8(a)(1) Yes.\n§ 63.8(a)(2) Yes.\n§ 63.8(a)(3) No Section reserved.\n§ 63.8(a)(4) Yes.\n§ 63.8(b)(1) Yes.\n§ 63.8(b)(2) Yes.\n§ 63.8(b)(3) Yes.\n§ 63.8(c)(1) No.\n§ 63.8(c)(1)(i) No.\n§ 63.8(c)(1)(ii) Yes.\n§ 63.8(c)(1)(iii) No.\n§ 63.8(c)(2) Yes.\n§ 63.8(c)(3) Yes.\n§ 63.8(c)(4) Yes.\n§ 63.8(c)(4)(i) No Subpart HH does not require continuous opacity monitors.\n§ 63.8(c)(4)(ii) Yes.\n§ 63.8(c)(5) through (c)(8) Yes.\n§ 63.8(d)(1) Yes.\n§ 63.8(d)(2) Yes.\n§ 63.8(d)(3) Yes Except for last sentence, which refers to an SSM plan. SSM plans are not required.\n§ 63.8(e) Yes Subpart HH does not specifically require continuous emissions monitor performance evaluation, however, the Administrator can request that one be conducted.\n§ 63.8(f)(1) through (f)(5) Yes.\n§ 63.8(f)(6) Yes.\n§ 63.8(g) No Subpart HH specifies continuous monitoring system data reduction requirements.\n§ 63.9(a) Yes.\n§ 63.9(b)(1) Yes.\n§ 63.9(b)(2) Yes Existing sources are given 1 year (rather than 120 days) to submit this notification. Major and area sources that meet § 63.764(e) do not have to submit initial notifications.\n§ 63.9(b)(3) No Section reserved.\n§ 63.9(b)(4) Yes.\n§ 63.9(b)(5) Yes.\n§ 63.9(c) Yes.\n§ 63.9(d) Yes.\n§ 63.9(e) Yes.\n§ 63.9(f) Yes.\n§ 63.9(g) Yes.\n§ 63.9(h)(1) through (h)(3) Yes Area sources located outside UA plus offset and UC boundaries are not required to submit notifications of compliance status.\n§ 63.9(h)(4) No Section reserved.\n§ 63.9(h)(5) through (h)(6) Yes.\n§ 63.9(i) Yes.\n§ 63.9(j) Yes.\n§ 63.9(k) Yes Only as specified in § 63.9(j).\n§ 63.10(a) Yes.\n§ 63.10(b)(1) Yes § 63.774(b)(1) requires sources to maintain the most recent 12 months of data on-site and allows offsite storage for the remaining 4 years of data.\n§ 63.10(b)(2) Yes.\n§ 63.10(b)(2)(i) No.\n§ 63.10(b)(2)(ii) No See § 63.774(g) for recordkeeping of (1) occurrence and duration and (2) actions taken during malfunctions.\n§ 63.10(b)(2)(iii) Yes.\n§ 63.10(b)(2)(iv) through (b)(2)(v) No.\n§ 63.10(b)(2)(vi) through (b)(2)(xiv) Yes.\n§ 63.10(b)(3) Yes § 63.774(b)(1) requires sources to maintain the most recent 12 months of data on-site and allows offsite storage for the remaining 4 years of data.\n§ 63.10(c)(1) Yes.\n§ 63.10(c)(2) through (c)(4) No Sections reserved.\n§ 63.10(c)(5) through (c)(8) Yes.\n§ 63.10(c)(9) No Section reserved.\n§ 63.10(c)(10) through (11) No See § 63.774(g) for recordkeeping of malfunctions.\n§ 63.10(c)(12) through (14) Yes.\n§ 63.10(c)(15) No.\n§ 63.10(d)(1) Yes.\n§ 63.10(d)(2) Yes Area sources located outside UA plus offset and UC boundaries do not have to submit performance test reports.\n§ 63.10(d)(3) Yes.\n§ 63.10(d)(4) Yes.\n§ 63.10(d)(5) No See § 63.775(b)(6) or (c)(6) for reporting of malfunctions.\n§ 63.10(e)(1) Yes Area sources located outside UA plus offset and UC boundaries are not required to submit reports.\n§ 63.10(e)(2) Yes Area sources located outside UA plus offset and UC boundaries are not required to submit reports.\n§ 63.10(e)(3)(i) Yes Subpart HH requires major sources to submit Periodic Reports semi-annually. Area sources are required to submit Periodic Reports annually. Area sources located outside UA plus offset and UC boundaries are not required to submit reports.\n§ 63.10(e)(3)(i)(A) Yes.\n§ 63.10(e)(3)(i)(B) Yes.\n§ 63.10(e)(3)(i)(C) No.\n§ 63.10(e)(3)(i)(D) Yes Section reserved.\n§ 63.10(e)(3)(ii) through (viii) Yes.\n§ 63.10(e)(4) Yes.\n§ 63.10(f) Yes.\n§ 63.11(a) and (b) Yes.\n§ 63.11(c), (d), and (e) Yes.\n§ 63.12(a) through (c) Yes.\n§ 63.13(a) through (c) Yes.\n§ 63.14(a) through (q) Yes.\n§ 63.15(a) and (b) Yes.\n§ 63.16 Yes.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart HH—National Emission Standards for Hazardous Air Pollutants From Oil and Natural Gas Production Facilities"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"ae0fa5794121a7c1202bf0bc1aa7f647c70fa8f5ec538e7abf3e1af650fdc8c8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.778-63.779","next":"us/40-cfr-63.780"},"notice":"GroundRules: Original legal text. Not legal advice."}