Nebraska Administrative Code
Nebraska Department of Environment and Energy
Title 129 - Air Quality Regulations
Appendix I - Hazardous Air Pollutants Sorted by CAS Number
Effective Date of Last Revision: September 28, 2022

CAS
Number
Chemical Name
VOC
Reporting
Level (Lbs/Year)
1146
Nickel Refinery Dust [8]
No
80
14333
Sodium Cyanide [8]
No
100
50000
Formaldehyde
Yes
1,000
50328
Benzo(a)pyrene
Yes
20
51285
2,4-Dinitrophenol
Yes
1,000
51796
Ethyl Carbamate (Urethane)
No
800
53703
Dibenz(a,h)anthracene
Yes
20
53963
2-Acetylaminofluorine [8]
Yes
10
56235
Carbon Tetrachloride
Yes
1,000
56382
Parathion
Yes
100
56553
Benz(a)anthracene
Yes
20
57147
1,1-Dimethyl Hydrazine
Yes
16
57578
beta-Propiolactone
Yes
100
57749
Chlordane
Yes
20
57976
7,12-Dimethylbenz(a)anthracene
Yes
0
58899
Lindane (all isomers)
No
20
59892
N-Nitrosomorpholine
Yes
1,000
60117
4-Dimethyl Aminoazobenzene
Yes
1,000
60344
Methyl Hydrazine
Yes
60
60355
Acetamide
Yes
1,000
62384
Phenyl Mercuric Acetate [8]
No
20
62533
Aniline
Yes
1,000
62737
Dichlorvos
Yes
200
62759
N-Nitrosodimethylamine
Yes
2
63252
Carbaryl [8]
No
2,000
64675
Diethyl Sulfate
Yes
1,000
67561
Methanol
Yes
2,000
67663
Chloroform
Yes
900
67721
Hexachloroethane
No
2,000
68122
Dimethyl Formamide
Yes
1,000
71432
Benzene
Yes
1,000
71556
Methyl Chloroform (1,1,1-Trichlorethane)
No
2,000
72435
Methoxychlor
Yes
2,000
74839
Methyl Bromide (Bromomethane)
Yes
2,000
74873
Methyl Chloride (Chloromethane)
Yes
2,000
74884
Methyl Iodide (Iodomethane)
Yes
1,000
74908
Hydrogen Cyanide
No
0
75003
Ethyl Chloride (Chloroethane)
Yes
2,000
75014
Vinyl Chloride
Yes
200
75058
Acetonitrile
Yes
1,000
75070
Acetaldehyde
Yes
2,000
75092
Methylene Chloride (Dichloromethane)
No
2,000
75150
Carbon disulfide
Yes
1,000
75218
Ethylene Oxide
Yes
100
75252
Bromoform
Yes
2,000
75343
Ethylidene Dichloride (1,1-Dichloroethane)
Yes
1,000
75354
Vinylidene Chloride (1,1-Dichloroethylene)
Yes
400
75445
Phosgene
Yes
100
75558
1,2-Propylenimine (2-Methyl aziridine)
Yes
6
75569
Propylene Oxide
Yes
2,000
75741
Tetramethyl Lead [8]
No
20
76448
Heptachlor
Yes
20
77474
Hexachlorocyclopentadiene
Yes
100
77781
Dimethyl Sulfate
Yes
100
78002
Tetraethyl Lead [8]
No
20
78591
Isophorone
Yes
2,000
78875
Propylene Dichloride (1,2-Dichloropropane)
Yes
1,000
79005
1,1,2-Trichloroethane
Yes
1,000
79016
Trichloroethylene
Yes
2,000
79061
Acrylamide
Yes
20
79107
Acrylic Acid
Yes
600
79118
Chloroacetic Acid
Yes
100
79345
1,1,2,2-Tetrachloroethane
Yes
300
79447
Dimethyl Carbamoyl Chloride
Yes
20
79469
2-Nitropropane
Yes
1,000
80626
Methyl Methacrylate
Yes
2,000
82688
Pentachloronitrobenzene (Quintobenzene)
Yes
300
84742
Dibutylphthalate
Yes
2,000
85449
Phthalic Anhydride
No
2,000
87683
Hexachlorobutadiene
Yes
900
87865
Pentachlorophenol
Yes
700
88062
2,4,6-Trichlorophenol
Yes
2,000
90040
0-Anisidine
Yes
1,000
91203
Naphthalene
Yes
2,000
91225
Quinoline [8]
Yes
12
91941
3,3-Dichlorobenzidene [8]
Yes
200
92524
Biphenyl [8]
Yes
2,000
92671
4-Aminobiphenyl [8]
Yes
1,000
92875
Benzidine [8]
Yes
0.6
92933
4-Nitrobiphenyl [8]
Yes
1,000
94757
2,4-D, Salts, Esters (2,4-Dichlorophenoxy acetic acid)
Yes
2,000
95476
o-Xylenes [8]
Yes
2,000
95487
o-Cresol [8]
Yes
1,000
95534
o-Toluidine
Yes
1,000
95807
2,4-Toluene Diamine
Yes
20
95954
2,4,5-Trichlorophenol
Yes
1,000
96093
Styrene Oxide
Yes
1,000
96128
1,2-Dibromo-3-chloropropane
Yes
20
96457
Ethylene Thiourea
No
600
98077
Benzotrichloride
Yes
12
98828
Cumene
Yes
2,000
98862
Acetophenone
Yes
1,000
98953
Nitrobenzene
Yes
1,000
100027
4-Nitrophenol
Yes
2,000
100414
Ethyl Benzene
Yes
2,000
100425
Styrene
Yes
1,000
100447
Benzyl Chloride
Yes
100
101144
4,4-Methylene Bis (2-chloroaniline) [8]
No
200
101688
Methylene Diphenyl Diisocyanate (MDI) [8]
No
100
101779
4,4’-Methylenedianiline
No
1,000
106423
p-Xylenes [8]
Yes
2,000
106445
p-Cresol [8]
Yes
1,000
106467
1,4-Dichlorobenzene(p)
Yes
1,000
106503
p-Phenylenediamine
Yes
2,000
106514
Quinone
Yes
2,000
106887
1,2-Epoxybutane
Yes
1,000
106898
Epichlorohydrin (1-Chloro-2,3-epoxypropane)
Yes
1,000
106934
Ethylene dibromide (Dibromoethane)
Yes
100
106945
1-Bromopropane (1-BP) (N-Propyl Bromide) (nPB)
Yes

106990
1,3-Butadiene
Yes
70
107028
Acrolein
Yes
40
107051
Allyl Chloride
Yes
1,000
107062
Ethylene Dichloride (1,2-Dichloroethane)
Yes
1,000
107131
Acrylonitrile
Yes
300
107211
Ethylene Glycol
Yes
2,000
107302
Chloromethyl Methyl Ether
Yes
100
108054
Vinyl Acetate
Yes
1,000
108101
Methyl Isobutyl Ketone
Yes
2,000
108316
Maleic anhydride
No
1,000
108383
m-Xylenes [8]
Yes
2,000
108394
m-Cresol [8]
Yes
1,000
108864
2-Methoxy Ethanol [8]
No
2,000
108883
Toluene
Yes
2,000
108907
Chlorobenzene
Yes
2,000
108952
Phenol
Yes
100
110543
Hexane
Yes
2,000
110805
2-Ethoxy Ethanol [8]
No
2,000
111422
Diethanolamine
Yes
2,000
111444
Dichloroethyl Ether (Bis(2-chloroethyl)ether)
Yes
60
114261
Propoxur (Baygon)
No
2,000
117817
Bis(2-ethylhexyl)phthalate (DEHP)
Yes
2,000
118741
Hexachlorobenzene
No
20
119904
3,3’-Dimethoxybenzidine [8]
Yes
100
119937
3,3’-Dimethyl Benzidine [8]
Yes
16
120809
Catechol
Yes
2,000
120821
1,2,4-Trichlorobenzene
Yes
2,000
121142
2,4-Dinitrotoluene
Yes
20
121448
Triethylamine
Yes
2,000
121697
N,N-Dimethylaniline
Yes
1,000
122667
1,2-Diphenylhydrazine
Yes
90
123319
Hydroquinone
Yes
1,000
123386
Propionaldehyde
Yes
2,000
123911
1,4-Dioxane (1,4-Diethyleneoxide)
Yes
2,000
126998
Chloroprene
Yes
1,000
127184
Tetrachloroethylene (Perchloroethylene)
No
2,000
130618
Cadmium Oxide [8]
No
20
131113
Dimethyl Phthalate
Yes
2,000
132649
Dibenzofurans [8]
No
2,000
133062
Captan
No
2,000
133904
Chloramben
No
1,000
140885
Ethyl Acrylate
Yes
1,000
151508
Potassium Cyanide [8]
No
100
151564
Ethyleneimine (Aziridine)
Yes
6
156627
Calcium Cyanamide
No
2,000
189559
1,2:7,8-Dibenzoppyrene
Yes
20
193395
Ideno(1,2,3-cd)pyrene
Yes
20
205992
Benzo(b)fluoranthene
Yes
20
218019
Chrysene
Yes
20
225514
Benz(c)aridine
Yes
20
302012
Hydrazine
No
8
334883
Diazomethane
Yes
1,000
463581
Carbonyl Sulfide
Yes
2,000
510156
Chlorobenzilate [8]
Yes
400
532274
2-Chloroacetophenone
Yes
60
534521
4,6-Dinitro-o-cresol, and Salts
No
100
540841
2,2,4-Trimethylpentane
Yes
2,000
542756
1,3-Dichloropropene
Yes
1,000
542881
Bis(chloromethyl)ether
Yes
0.6
584849
2,4-Toluene Diisocyanate
Yes
100
593602
Vinyl Bromide (bromoethene)
Yes
600
624839
Methyl Isocyanate
Yes
100
680319
Hexamethylphosphoramide
No
20
684935
N-Nitroso-N-methylurea
Yes
0
748794
Mercuric Chloride [8]
No
20
822060
Hexamethylene,-1,6-diisocyanate
No
20
1120714
1,3-Propane Sultone
No
30
1308389
Trivalent Chromium Compounds (Chromium Oxide)
No
2,000
1309644
Antimony Trioxide [8]
No
1,000
1319773
Cresols/Cresylic Acid (isomers and mixture) [8]
Yes
1,000
1330207
Xylenes (isomers and mixture) [8]
Yes
2,000
1332214
Asbestos
No
0
1336363
Polychlorinated Biphenyls (Aroclors, PCBs)
Yes
18
1345046
Antimony Trisulfide [8]
No
100
1582098
Trifluralin
No
2,000
1634044
Methyl Tert Butyl Ether
Yes
2,000
1746016
2,3,7,8-Tetrachlorodibenzo-p-dioxin [8]
No
0.0012
3547044
P,p’-Dichlorodiphenyl Ethane (DDE) [8]
Yes
20
7439921
Lead and Compounds (except those specifically listed) [5]
No
20
7439965
Manganese and Compounds (except those
specifically listed) [5] [8]
No
800
7439976
Elemental Mercury [8]
No
20
7440020
Nickel Compounds (except those specifically listed)
[5] [8]
No
1,000
7440360
Antimony Compounds (except those specifically listed) [5] [8]
No
2,000
7440382
Arsenic and Inorganic Arsenic Compounds [8]
No
10
7440417
Beryllium Compounds (except Beryllium Salts) [5] [8]
No
16
7440439
Cadmium Compounds (except those specifically listed) [5] [8]
No
20
7440473
Chromium Compounds (except Hexavalent and Trivalent) [5] [8]
No
2,000
7440484
Cobalt Compounds (except those specifically listed)
[5] [8]
No
100
7488564
Selenium Sulfide (mono and di) [8]
No
100
7550450
Titanium Tetrachloride
No
100
7647010
Hydrochloric Acid
No
2,000
7664393
Hydrogen Fluoride (Hydrofluoric Acid)
No
100
7723140
Phosphorous
No
100
7782492
Selenium and Compounds (except those specifically listed) [5] [8]
No
100
7782505
Chlorine
No
100
7783075
Hydrogen Selenide [8]
No
100
7783702
Antimony Pentafluoride [8]
No
100
7784421
Arsine [8]
No
10
7803512
Phosphine
No
2,000
8001352
Toxaphene (Chlorinated Camphene)
No
20
10025737
Chromic Chloride
No
100
10045940
Mercuric Nitrate [8]
No
0
10102188
Sodium Selenite [8]
No
100
10210681
Cobalt Carbonyl [8]
No
100
12035722
Nickel Subsulfide [8]
No
40
12108133
Methylcyclopentadienyl Manganese
No
100
13410010
Sodium Selenate [8]
No
100
13463393
Nickel Carbonyl [8]
No
0
14464461
Silica (Crystalline) [8]
No
0
14807966
Talc (containing Asbestos form fibers) [8]
No
0
18540299
Hexavalent Chromium and Compounds [8]
No
4
28300745
Antimony Potassium Tartrate [8]
No
1,000
62207765
Fluomine
No
100
65997173
Glass Wool [8]
No
0
66733219
Erionite [8]
No
0
99999918
Radionuclides (including radon) [4]
No
[7]
142844006
Ceramic Fibers [8]
No
0
-
Beryllium Salts [8]
No
0.04
-
Cyanide Compounds (except those specifically
listed) [1] [5] [8]
No
2,000
-
Coke Oven Emissions
No
30
-
Glycol Ethers (except those specifically listed) [2] [5] [8]
No
0
-
Mineral Fiber Compounds (except those specifically
listed) [3] [5] [8]
No
0
-
Mercury Compounds (except those specifically listed) [5] [8]
No
20
-
Rock Wool [8]
No
0
-
Slag Wool [8]
No
0
-
Polycyclic Organic Matter-POM (except those specifically listed) [5] [8]
Yes
20
-
Dioxins and Furans (TCDD equivalent) [6]
No
0

[1] XCN where X=H or any other group where a formal dissociation may occur
[2] Include mono-and di-ethers of ethylene glycol, diethylene glycol, and triethylene glycol R-(OCH2CH2)n-OR' where n=1, 2, or 3; R=alkyl or aryl groups, R'=R,H, or groups which, when removed, yield glycol ethers with the structure: R-(OCH2CH)n-OH. Polymers are excluded from the glycol category. Ethylene glycol monobutyl ether is excluded from this category.
[3] Includes glass microfibers, glass wool fibers, rock wool fibers and slag wool fibers, each characterized as "respirable" (fiber diameter < 3.5 micrometers) and possessing an aspect ratio (fiber length divided by fiber diameter) > 3.
[4] A type of atom which spontaneously undergoes radioactive decay.
[5] For this chemical group, specific copounds or subgroups are named specifically in this table. For the remainder of the chemicals in the chemical group, a single de minimis value is listed, and this value applies to the sum of the compounds in the group which are not named specifically.
[6] The "toxic equivalen factor" method in EPA/625/3-89-016, [U.S. EPA (1989) Interim procedures for estimating risk associated with exposure to mixtures] should be used for PCDD/PCDF mixtures. A different de minimis level will be determined for each mixture depending on the equivalency factors which are compound specific.
[7] The EPA relies on Subparts B and I, and Appendix E of 40 CFR Part 61 and assigns a de minimis level based on an effective dose equivalent of 0.3 millirem per year for a 7 year exposure period that would result in a cancer risk of 1 per million. The individual radionuclides subject to de minimis levels used for section 112(g) are also contained in 40 CFR Part 61.
[8] Emissions from all substances in each set below should be aggregated for the purpose of determining major source status as described in Chapter 1, Section 001:

· Cresols/Cresylic Acid (isomers and mixture); m-Cresol; o-Cresol; p-Cresol
· Xylenes (isomers and mixture); m-Xylenes; o-Xylenes, p-Xylenes
· Antimony Compounds; Antimony Pentafluoride; Antimony Postassium Tartrate; Antimony Trioxide; Antimony Trisulfide

· Arsenic and Inorganic Arsenic Compounds; Arsine


· Beryllium Compounds (except Beryllium Salts); Beryllium Salts
· Cadmium Compounds; Cadmium Oxide
· Chromium compounds (except Hexavalent and Trivalent); Hexavalent Chromium compounds; Trivalent Chromium Compounds (Chromium Oxide)
· Cobalt Compounds; Cobalt Carbonyl
· Cyanide Compounds; Potassium Cyanide; Sodium Cyanide
· Glycol Ethers; 2-Ethoxy Ethanol; 2-Methoxy Ethanol
· Lead and Compounds; Tetraethyl Lead; Tetramethyl Lead
· Mercury Compounds; Elemental Mercury; Mercuric Chloride; Mercuric Nitrate; Phenyl Mercuric Acetate
· Mineral Fiber Compounds; Ceramic Fibers; Erionite; Glass Wool; Rock Wool;
· Silica (Crystalline); Slag Wool; Talc (containing Asbestos form fibers);
· Nickel Compounds; Nickel Carbonyl; Nickel Refinery Dust; Nickel Subsulfide
· Polycyclic Organic Matter (POM); 2-Acetylaminofluorene; 4-Aminobiphenyl; Benzidine; Biphenyl; Carbaryl; Chlorobenzilate; Dibenzofurans; 3,3- Dichlorobenzidine; p,p'-Dichlorodiphenyl Ethane (DDE); 3,3-Dimethoxybenzidine; 3,3'-Dimethylbenzidine; 4,4-Methylene bis(2 Chloroaniline); Methylene Diphenyl Diisocyanate; 4-Nitrobiphenyl; Quinoline; 2,3,7,8-Tetrachlorodibenzo-p-dioxin
· Selenium and Compounds; Hydrogen Selenide; Selenium Sulfide (mono and di); Sodium Selenate; Sodium Selenite