Colorado Code
Part 1 - Air Quality Control Program
§ 25-7-109.3. Colorado Hazardous Air Pollutant Control and Reduction Program - Rules

(B) Any source which is required to install Colorado MACT or GACT under regulations promulgated pursuant to sub-subparagraph (A) of this subparagraph (I) only and which subsequently is required to install federal MACT or GACT that is significantly different than Colorado MACT or GACT and imposes a significant capital cost on the source, then the general assembly shall study and consider whether an operating permit fee credit or a state tax credit for the capital costs, or a percentage of the costs, is appropriate.
(II) Until such time as the commission is authorized to act pursuant to paragraph (a) of this subsection (4) and upon the recommendation of the executive director of the department of public health and environment, the governor may find, as expressed in an executive order, that after an existing source has installed Colorado or federal MACT or GACT, or Colorado MACT or GACT has been proposed for a new source or a modification of an existing source, the source presents an unacceptable threat of actual health effects. The governor may then direct the commission to evaluate and, as necessary, conduct studies on actual health effects. If the commission determines by a preponderance of the evidence that emissions of hazardous air pollutants by the source will cause an unacceptable threat of actual health effects to persons living in the vicinity of such source, the commission may then promulgate additional technology-based control regulations, pollution prevention, or health-based measures to protect the public health. The commission shall provide a schedule of compliance leading to final compliance which considers matters identified in paragraphs (c), (e), (f), and (g) of this subsection (4).
(III) This paragraph (h) shall remain effective only until such time as the commission acts pursuant to its authority under paragraph (a) of this subsection (4).








Chemical Abstract Service Number Chemical (I) 50-18-0 Cyclophosphamide (II) 50-32-8 Benzo(a)pyrene (III) 52-24-4 Tris(aziridinyl)-phosphine sulfide (IV) 52-24-4 Thio-tepa (V) 53-70-3 Dibenz[a,h]anthracene (VI) 55-98-1 1,4-butanediol dimethanesulphonate (VII) 56-53-1 Dirthylstulresterol (VIII) 56-55-3 Benz[a]anthracene (IX) 70-25-7 N-methyl-n-nitro-n-nitrosoguanidine (X) 78-98-8 Methylglyoxol (XI) 115-28-6 Chlorendic acid (XII) 117-10-2 Chrysazin (XIII) 122-60-1 Phenyl glycidyl ether (XIV) 132-27-4 2-biphenylol sodium salt (XV) 154-93-8 Bischloroethyl nitrosourea (XVI) 298-81-7 8-methoxypsoralen (XVII) 299-75-2 Treosulphan (XVIII) 305-03-3 Clorambucil (XIX) 370-67-2 Azactidine (XX) 366-70-1 Procarbazine hydrochloride (XXI) 446-86-6 Azathioprine (XXII) 484-20-8 5-methoxypsoralen (XXIII) 494-03-1 Chlornaphazine (XXIV) 590-96-5 Methanol, (methyl-onn-azoxy) (XXV) 607-57-8 2-nitrofluorene (XXVI) 615-53-2 N-nitroso-n-methylurethane (XXVII) 817-09-4 Trichlormethine (XXVIII) 1188-47-2 Nitrilotriacetic acid, copper(2+)salt(1:1) (XXIX) 1188-48-3 Nitrilotriacetic acid, magnesium salt(1:1) (XXX) 1309-64-4 Antimony oxide (XXXI) 1317-98-2 Valentinite (XXXII) 1402-68-2 Aflatoxins (XXXIII) 2399-81-7 Nitrilotriacetic acid, beryllium salt(1:1) (XXXIV) 2399-83-9 Nitrilotriacetic acid, barium salt(1:1) (XXXV) 2399-85-1 Nitrilotriacetic acid, tripotassium salt (XXXVI) 2399-86-2 Nitrilotriacetic acid, dipotassium salt (XXXVII) 2399-87-3 Nitrilotriacetic acid, beryllium potassium salt(1:1) (XXXVIII) 2399-88-4 Nitrilotriacetic acid, potassium magnesium salt(1:1:1) (XXXIX) 2399-89-5 Nitrilotriacetic acid, potassium strontium salt(1:1:1) (XL) 2399-94-2 Nitrilotriacetic acid, calcium salt(1:1) (XLI) 2455-08-5 Nitrilotriacetic acid, calcium potassium salt(1:1:1) (XLII) 2475-45-8 Disperse blue 1 (XLIII) 2646-17-5 C1 solvent orange2
(XLIV) 3130-95-8 Nitrilotriacetic acid, scandium (3+) salt (1:1) (XLV) 3438-06-0 Nitrilotriacetic acid, neodymium (3+) salt (1:1) (XLVI) 5064-31-3 Nitrilotriacetic acid, trisodium salt (XLVII) 5522-43-0 1-nitropyrene (XLVIII) 5798-43-6 Nitrilotriacetic acid, disodium salt, compound with oxo (dihydrogen nit) (XLIX) 7496-02-8 6-nitrochrysene (L) 10042-84-9 Nitrilotriacetic acid, sodium salt (unspecified) (LI) 10043-92-2 Radon decay products (LII) 10413-71-5 Nitrilotriacetic acid, erbium(3+) salt (3:1) (LIII) 12412-52-1 Senarmontite (LIV) 12510-42-8 Erionite (LV) 13010-47-4 1-(2-chloroethyl)-3- cyclohexyl-1-nitrosourea (LVI) 13909-09-6 1,(2-chloroethyl)-3-(4 methyl-cyclohexyl)-1 nitrosourea (LVII) 14695-88-6 Nitrilotriacetic acid, compound with iron chloride, as /fecl3/ (LVIII) 14807-96-6 Talc (containing asbestos fibers) (LIX) 14981-08-9 Nitrilotriacetic acid, calcium salt (LX) 15414-25-2 Nitrilotriacetic acid, yttrium (3+) salt (1:1) (LXI) 15467-20-6 Nitrilotriacetic acid, disodium salt (LXII) 15663-27-1 Cisplatin (LXIII) 15844-52-7 Nitrilotriacetic acid, copper (2+) complex (LXIV) 15934-02-8 Nitrilotriacetic acid, monoammonium salt (LXV) 16448-54-7 Nitrilotriacetic acid, iron (3+) complex (LXVI) 16568-02-8 Gyromitrin (LXVII) 18105-03-8 Nitrilotriacetic acid, mercury (2+) salt (2:3) (LXVIII) 18432-54-7 Nitrilotriacetic acid, cadmium (2+) complex (LXIX) 18540-29-9 Chromium compounds, hexavalent (LXX) 18662-53-8 Nitrilotriacetic acid, trisodium salt monohydrate (LXXI) 18946-94-6 Nitrilotriacetic acid, neodymium (3+) salt (1:1) (LXXII) 18983-72-7 Nitrilotriacetic acid, beryllium potassium salt (1:1) (LXXIII) 18994-66-6 Nitrilotriacetic acid, monosodium salt (LXXIV) 19010-73-2 Nitrilotriacetic acid, aluminium (3+) complex
(LXXV) 19456-58-7 Nitrilotriacetic acid, inidium (3+) complex (LXXVI) 22965-60-2 Nitrilotriacetic acid, nickel (3+) complex (LXXVII) 23214-92-8 Adrianmycin (LXXVIII) 23255-03-0 Nitrilotriacetic acid, disodium salt, monohydrate (LXXIX) 23319-51-9 Nitrilotriacetic acid, cobalt (3+) complex (LXXX) 23555-96-6 Nitrilotriacetic acid, potassium strontium salt (2:4:1) (LXXXI) 23555-98-8 Nitrilotriacetic acid, calcium potassium salt (2:1:4) (LXXXII) 25817-24-7 Nitrilotriacetic acid, potassium salt (LXXXIII) 28444-53-3 Nitrilotriacetic acid, monopotassium salt (LXXXIV) 28027-38-0 Nitrilotriacetic acid, holmium salt (LXXXV) 29027-90-5 Nitrilotriacetic acid, cerium salt (LXXXVI) 29507-58-2 Nitrilotriacetic acid, zinc (3+) complex sodium salt (LXXXVII) 32685-17-9 Nitrilotriacetic acid, triammonium salt (LXXXVIII) 34831-02-2 Nitrilotriacetic acid, copper (2+) hydrogen complex (LXXXIX) 34831-03-3 Nitrilotriacetic acid, nickel (2+) hydrogen complex (XC) 36711-58-7 Nitrilotriacetic acid, manganese salt (XCI) 42397-64-8 1,6-dinitropyrene (XCII) 42397-65-9 1,8-dinitropyrene (XCIII) 46242-44-8 Nitrilotriacetic acid, antimony (3+) complex (XCIV) 50618-02-7 Nitrilotriacetic acid, tricadium (2+) complex (XCV) 53108-47-7 Nitrilotriacetic acid, copper (2+) complex sodium salt (XCVI) 53108-50-2 Nitrilotriacetic acid, cobalt (3+) hydrogen complex (XCVII) 53818-84-1 Nitrilotriacetic acid, tin (2+) salt (XCVIII) 54749-90-5 Chlorozotocin (XCIX) 57835-92-4 4-nitropyrene (C) 59865-13-3 Cyclosporin A (CI) 60034-45-9 Nitrilotriacetic acid, calcium sodium salt (1:1:1) (CII) 60153-49-3 3-(n-nitrosomethylamino) propionitrile
(CIII) 61017-62-7 Nitrilotriacetic acid, iron (2+) complex sodium salt (1:1:1) (CIV) 62450-06-0 trp-p-1 (CV) 62450-07-1 trp-p-2 (CVI) 64091-91-4 Ketone, 3-pyridyl3- (n-methyl-n-nitrosoamino) propyl (CVII) 67730-10-3 2-aminodipyrido[1,2-a3,2- d]imidazole (CVIII) 66730-11-4 2-amino-6- methyldipyrido[1,2-a32- d]imidazole (CIX) 68006-83-7 2-amino-3-methyl- 9h-pyrido[2,3-b]indole (CX) 69679-89-6 Nitrilotriacetic acid, calcium salt (2:3) (CXI) 71484-80-5 Nitrilotriacetic acid, copper (2+) complex ammonium salt (CXII) 72629-49-3 Nitrilotriacetic acid, dilithium salt (CXIII) 73772-91-5 Nitrilotriacetic acid, magnesium salt (CXIV) 76180-96-6 2-amino-3- methylimadazo[4,5- f]quinoline (CXV) 79217-60-0 Cyclosporine (CXVI) 79849-02-8 Nitrilotriacetic acid, lead (2+) salt (1:1) (CXVII) 79915-08-5 Nitrilotriacetic acid, lead (2+) potassium salt (1:1:1) (CXVIII) 79915-09-6 Nitrilotriacetic acid, lead (2+) salt (2:3) (CXIX) 80508-23-2 N-nitrosonornicotine (CXX) 86892-89-9 Nitrilotriacetic acid, disodium ammonium salt (CXXI) 92474-39-0 Nitrilotriacetic acid, trisilver salt (CXXII) 92988-11-9 Nitrilotriacetic acid, strontium sodium salt (CXXIII) 108171-26-2 Chlorinated paraffins (c12, 60% chlorine) (CXXIV) 309-00-2 Aldrin (CXXV) 60-57-1 Dieldrin (CXXVI) 55-18-5 N-nitrosodiethylamine (CXXVII) 319-84-6 L-hexachlorocyclohexane (CXXVIII) 608-73-1 Hexachlorocyclohexane-tech (CXXIX) 7644-41-0 1,4 dichloro-2-butene (CXXX) 924-16-3 N-nitroso-d-n-butyl-amine
Source: L. 92: Entire section added, p. 1180, § 13, effective July 1. L. 94: (2) amended, p. 1419, § 2, effective May 25; (4)(h)(I)(A) and (4)(h)(II) amended, p. 2782, § 499, effective July 1. L. 96: (1) amended, p. 1257, § 150, effective August 7. L. 2016: (3)(b.1), (3)(d)(III), (4)(d), (4)(h)(I)(A), (4)(h)(II), and (5)(b) amended and (4)(a)(II) and (4)(b) repealed, (SB 16-189), ch. 210, p. 771, § 64, effective June 6. L. 2021: (2) amended, (HB 21-1266), ch. 411, p. 2748, § 15, effective July 2.
Editor's note: Section 24 of chapter 411 (HB 21-1266), Session Laws of Colorado 2021, provides that the act changing this section applies to conduct occurring on or after July 2, 2021.
Cross references: (1) For the legislative declaration contained in the 1994 act amending subsections (4)(h)(I)(A) and (4)(h)(II), see section 1 of chapter 345, Session Laws of Colorado 1994. For the legislative declaration contained in the 1996 act amending this section, see section 1 of chapter 237, Session Laws of Colorado 1996.
(2) For the short title ("Environmental Justice Act") and the legislative declaration in HB 21-1266, see sections 1 and 2 of chapter 411, Session Laws of Colorado 2021.

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