15A NCAC 02D .1104       TOXIC AIR POLLUTANT GUIDELINES

A facility shall not emit any of the following toxic air pollutants in such quantities that may cause or contribute beyond the premises (adjacent property boundary) to any significant ambient air concentration that may adversely affect human health. In determining these significant ambient air concentrations, the Division shall be guided 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):

 

 

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

  dichlorodifluoromethane   (75-71-8)

 

248

 

 

  dichlorofluoromethane  (75-43-4)

 

0.5

 

 

  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 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

 

 

 

  1,1,1,2-tetrachloro-2,2,- difluoroethane (76-11-9)

 

52

 

 

  1,1,2,2-tetrachloro-1,2- difluoroethane (76-12-0)

 

52

 

 

  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

 

 

 

  trichlorofluoromethane  (75-69-4)

 

 

560

 

  1,1,2-trichloro-1,2,2- trifluoroethane (76-13-1)

 

 

 

950

  vinyl chloride (75-01-4)

3.8 x 10-4

 

 

 

  vinylidene chloride (75-35-4)

 

0.12

 

 

  xylene (1330-20-7)

 

2.7

 

65

 

History Note:        Authority G.S. 143-215.3(a)(1); 143-215.107(a)(3),(4),(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.