North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 02 - Environmental Management › Subchapter D - AIR POLLUTION CONTROL REQUIREMENTS › Section .1100 - CONTROL OF TOXIC AIR POLLUTANTS › Section 02D .1104 - TOXIC AIR POLLUTANT GUIDELINES

Current through Register Vol. 39, No. 2, July 15, 2024
A facility shall not emit any of the following toxic air
					 pollutants in such quantities that may cause or contribute beyond the
					 facility's premises to any significant ambient air concentration that may
					 adversely affect human health, except as allowed pursuant to
					 15A NCAC
					 02Q .0700. In determining these significant
					 ambient air concentrations, the Division shall be governed by the following
					 list of acceptable ambient levels in milligrams per cubic meter at 77° F
					 (25° C) and 29.92 inches (760 mm) of mercury pressure, except for
					 asbestos:
Acceptable Ambient Levels (AAL) in Milligrams per
								Cubic Meter (mg/m3) Except Where Noted
Pollutant (CAS Number)
Annual (Carcinogens)
24-hour
(Chronic Toxicants)
1-hour
(Acute Systemic Toxicants)
1-hour
(Acute Irritants)
acetaldehyde (75-07-0)
27
acetic acid (64-19-7)
3.7
acrolein (107-02-8)
0.08
acrylonitrile (107-13-1)
0.03
1
ammonia (7664-41-7)
2.7
aniline (62-53-3)
1
arsenic and inorganic arsenic compounds
2.1 x 10-6
asbestos (1332-21-4)
2.8 x 10-6
								fibers/ml
aziridine (151-56-4)
0.006
benzene (71-43-2)
1.2 x 10-4
benzidine and salts (92-87-5)
1.5 x 10-8
benzo(a)pyrene (50-32-8)
3.3 x 10-5
benzyl chloride (100-44-7)
0.5
beryllium (7440-41-7)
4.1 x 10-6
beryllium chloride (7787-47-5)
4.1 x 10-6
beryllium fluoride (7787-49-7)
4.1 x 10-6
beryllium nitrate (13597-99-4)
4.1 x 10-6
bioavailable chromate pigments, as chromium (VI)
								equivalent
8.3 x 10-8
bis-chloromethyl ether (542-88-1)
3.7 x 10-7
bromine (7726-95-6)
0.2
1,3-butadiene (106-99-0)
4.4 x 10-4
cadmium (7440-43-9)
5.5 x 10-6
cadmium acetate (543-90-8)
5.5 x 10-6
cadmium bromide (7789-42-6)
5.5 x 10-6
carbon disulfide (75-15-0)
0.186
carbon tetrachloride (56-23-5)
6.7 x 10-3
chlorine (7782-50-5)
0.0375
0.9
chlorobenzene (108-90-7)
2.2
chloroform (67-66-3)
4.3 x 10-3
chloroprene (126-99-8)
0.44
3.5
cresol (1319-77-3)
2.2
p-dichlorobenzene (106-46-7)
66
di(2-ethylhexyl)phthalate (117-81-7)
0.03
dimethyl sulfate (77-78-1)
0.003
1,4-dioxane (123-91-1)
0.56
epichlorohydrin (106-89-8)
8.3 x 10-2
ethyl acetate (141-78-6)
140
ethylenediamine (107-15-3)
0.3
2.5
ethylene dibromide (106-93-4)
4.0 x 10-4
ethylene dichloride (107-06-2)
3.8 x 10-3
ethylene glycol monoethyl ether
(110-80-5)
0.12
1.9
ethylene oxide (75-21-8)
2.7 x 10-5
ethyl mercaptan (75-08-1)
0.1
fluorides
0.016
0.25
formaldehyde (50-00-0)
0.15
hexachlorocyclopentadiene (77-47-4)
0.0006
0.01
hexachlorodibenzo-p-dioxin
(57653-85-7)
7.6 x 10-8
n-hexane (110-54-3)
1.1
hexane isomers except n-hexane
360
hydrazine (302-01-2)
0.0006
hydrogen chloride (7647-01-0)
0.7
hydrogen cyanide (74-90-8)
0.14
1.1
hydrogen fluoride (7664-39-3)
0.03
0.25
hydrogen sulfide (7783-06-4)
0.12
maleic anhydride (108-31-6)
0.012
0.1
manganese and compounds
0.031
manganese cyclopentadienyl tricarbonyl
								(12079-65-1)
0.0006
manganese tetroxide (1317-35-7)
0.0062
mercury, alkyl
0.00006
mercury, aryl and inorganic compounds
0.0006
mercury, vapor (7439-97-6)
0.0006
methyl bromide (74-83-9)
0.005a
1.0
methyl chloroform (71-55-6)
12
245
methylene chloride (75-09-2)
2.4 x 10-2
1.7
methyl ethyl ketone (78-93-3)
3.7
88.5
methyl isobutyl ketone (108-10-1)
2.56
30
methyl mercaptan (74-93-1)
0.05
nickel carbonyl (13463-39-3)
0.0006
nickel metal (7440-02-0)
0.006
nickel, soluble compounds, as nickel
0.0006
nickel subsulfide (12035-72-2)
2.1 x 10-6
nitric acid (7697-37-2)
1
nitrobenzene (98-95-3)
0.06
0.5
n-nitrosodimethylamine (62-75-9)
5.0 x 10-5
non-specific chromium (VI) compounds, as chromium
								(VI) equivalent
8.3 x 10-8
pentachlorophenol (87-86-5)
0.003
0.025
perchloroethylene (127-18-4)
1.9 x 10-1
phenol (108-95-2)
0.95
phosgene (75-44-5)
0.0025
phosphine (7803-51-2)
0.13
polychlorinated biphenyls
(1336-36-3)
8.3 x 10-5
soluble chromate compounds, as chromium (VI)
								equivalent
6.2 x 10-4
styrene (100-42-5)
10.6
sulfuric acid (7664-93-9)
0.012
0.1
tetrachlorodibenzo-p-dioxin
(1746-01-6)
3.0 x 10-9
1,1,2,2-tetrachloroethane (79-34-5)
6.3 x 10-3
toluene (108-88-3)
4.7
56
toluene diisocyanate, 2,4- (584-84-9) and 2,6-
								(91-08-7) isomers
0.0002
trichloroethylene (79-01-6)
5.9 x 10-2
vinyl chloride (75-01-4)
3.8 x 10-4
vinylidene chloride (75-35-4)
0.12
xylene (1330-20-7)
2.7
65
a This compound has not been
					 defined as a carcinogen.
Authority
					 G.S.
					 143-215.3(a)(1);
					 143-215.107(a)(3);
					 143-215.107(a)(4);
					 143-215.107(a)(5);
					 143B-282;
Eff. May
					 1, 1990;
Amended Eff. September 1, 1992; March 1, 1992;
Temporary Amendment Eff. July 20, 1997;
Amended Eff. July 7, 2014;
					 May 1, 2014; March 1, 2010; June 1, 2008; April 1, 2005; April 1, 2001; July 1,
					 1998;
Readopted Eff. July 1, 2018;
Amended Eff.
					 November 1, 2020.