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Arizona Administrative Code (Last Updated: November 17, 2016) |
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Title 18. ENVIRONMENTAL QUALITY |
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Chapter 2. DEPARTMENT OF ENVIRONMENTAL QUALITY - AIR POLLUTION CONTROL |
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Article 17. ARIZONA STATE HAZARDOUS AIR POLLUTANTS PROGRAM |
Table 3. Acute and Chronic Ambient Air Concentrations
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Chemical
Acute AAC (mg/m3)
Chronic AAC (mg/m3)
1,1,1-Trichloroethane (Methyl Chloroform)
2,075
2.30E+00
1,1,2,2-Tetrachloroethane
18
3.27E-05
1,3-Butadiene
7,514
6.32E-05
1,4-Dichlorobenzene
300
3.06E-04
2,2,4-Trimethylpentane
900
N/A
2,4-Dinitrotoluene
5.0
2.13E-05
2-Chloroacetophenone
N/A
3.13E-05
Acetaldehyde
306
8.62E-04
Acetophenone
25
3.65E-01
Acrolein
0.23
2.09E-05
Acrylonitrile
38
2.79E-05
Antimony Compounds (Selected compound: Antimony)
13
1.46E-03
Arsenic Compounds (Selected compound: Arse- nic)
2.5
4.41E-07
Benzene
1,276
2.43E-04
Benzyl Chloride
26
3.96E-05
Beryllium Compounds (Selected compound: Beryllium)
0.013
7.90E-07
Biphenyl
38
1.83E-01
bis(2-Ethylhexyl) Phthalate
13
4.80E-04
Bromoform
7.5
1.72E-03
Cadmium Compounds (Selected compound: Cadmium)
0.25
1.05E-06
Carbon Disulfide
311
7.30E-01
Carbon Tetrachloride
201
1.26E-04
Department of Environmental Quality – Air Pollution Control
Carbonyl Sulfide
30
N/A
Chlorobenzene
1,000
1.04E+00
Chloroform
195
3.58E-04
Chromium Compounds (Selected compound: Hexavalent Chromium)
0.10
1.58E-07
Cobalt Compounds (Selected compound: Cobalt)
10
6.86E-07
Cumene
935
4.17E-01
Cyanide Compounds (Selected compound: Hydrogen Cyanide)
3.9
3.13E-03
Dibenzofurans
25
7.30E-03
Dichloromethane (Methylene Chloride)
347
4.03E-03
Dimethyl formamide
164
3.13E-02
Dimethyl Sulfate
0.31
N/A
Ethyl Benzene
250
1.04E+00
Ethyl Chloride (Chloroethane)
1,250
1.04E+01
Ethylene Dibromide (Dibromoethane)
100
3.16E-06
Ethylene Dichloride (1,2-Dichloroethane)
405
7.29E-05
Ethylene glycol
50
4.17E-01
Ethylidene Dichloride (1,1-Dichloroethane)
6,250
5.21E-01
Formaldehyde
17
1.46E-04
Glycol Ethers (Selected compound: Diethylene glycol, monoethyl ether)
250
3.14E-03
Hexachlorobenzene
0.50
4.12E-06
Hexane
11,649
2.21E+00
Hydrochloric Acid
16
2.09E-02
Hydrogen Fluoride (Hydrofluoric Acid)
9.8
1.46E-02
Isophorone
13
2.09E+00
Manganese Compounds (Selected compound: Manganese)
2.5
5.21E-05
Mercury Compounds (Selected compound: Ele- mental Mercury)
1.0
3.13E-04
Methanol
943
4.17E+00
Methyl Bromide
261
5.21E-03
Methyl Chloride
1,180
9.39E-02
Methyl Hydrazine
0.43
3.96E-07
Department of Environmental Quality – Air Pollution Control
Methyl Isobutyl Ketone (Hexone)
500
3.13E+00
Methyl Methacrylate
311
7.30E-01
Methyl Tert-Butyl Ether
1,444
7.40E-03
N, N-Dimethylaniline
25
7.30E-03
Naphthalene
75
5.58E-05
Nickel Compounds (Selected compound: Nickel Refinery Dust)
5.0
7.90E-06
Phenol
58
2.09E-01
Polychlorinated Biphenyls (Selected Compound: Aroclor 1254)
2.5
1.90E-05
Polycyclic Organic Matter (Selected compound: Benzo(a)pyrene)
5.0
2.02E-06
Propionaldehyde
403
8.62E-04
Propylene Dichloride
250
4.17E-03
Selenium Compounds (Selected compound: Selenium)
0.50
1.83E-02
Styrene
554
1.04E+00
Tetrachloroethylene (Perchlorethylene)
814
3.20E-04
Toluene
1,923
5.21E+00
Trichloroethylene
1,450
1.68E-05
Vinyl Acetate
387
2.09E-01
Vinyl Chloride
2,099
2.15E-04
Vinylidene Chloride (1,2-Dichloroethylene)
38
2.09E-01
Xylene (Mixed Isomers)
1,736
1.04E-01
2. For state HAPs for which an AAC has not already been determined, the applicant shall determine the acute and chronic AACs according to the process in Appendix 12.
3. For specific compounds included in state HAPS listed as a group (e.g., arsenic compounds), the applicant may use an AAC developed according to the process in Appendix 12.
D. As part of the risk management analysis, an applicant may vol- untarily propose emissions limitations under R18-2-306.01 in order to avoid being subject to HAPRACT under R18-2-1706, or AZMACT under R18-2-1707.
E. Documentation of Risk Management Analysis. The applicant shall document each RMA performed for each state HAP and shall include the following information:
1. The potential maximum public exposure of the state HAP;
2. The method used to determine the potential maximum public exposure:
a. For Tier 1, the calculation demonstrating that the emissions of the state HAP are less than the health- based ambient air concentration, determined under subsection (C)(3).
b. For Tier 2, the input files to, and the results of the SCREEN Modeling.
c. For Tier 3:
i. The input files to, and the results of the SCREEN Modeling; and
ii. The permanent and enforceable institutional or engineering controls approved by the Director under subsection (B)(3)(b).
d. For Tier 4:
i. The model the applicant used;
ii. The input files to, and the results of the model- ing;
iii. The modeling protocol approved by the Direc- tor under subsection (B)(4)(b); and
iv. The permanent and enforceable institutional or engineering controls approved by the Director under subsection (B)(4)(d);
3. The health-based ambient air concentrations determined under subsection (C); and
4. Any voluntary emissions limitations that the applicant proposes under subsection (D) and R18-2-306.01.
F. An applicant may conduct an RMA for any alternative operat- ing scenario requested in the application consistent with the requirements of this Section. The alternative operating sce- nario may allow a range of operating conditions if the Director concludes that the RMA demonstrates no adverse effects to human health or adverse environmental effects from opera-
Department of Environmental Quality – Air Pollution Control
tions within that range. Modifications to a source consistent with the alternative operating scenario are not subject to this Article.
Historical Note
New Section made by final rulemaking at 12 A.A.R.
1953, effective January 1, 2007 (Supp. 06-2).