Administrative Rules of Montana › Department 17 - ENVIRONMENTAL QUALITY › Chapter 17.8 - AIR QUALITY › Subchapter 17.8.7 - Permit, Construction, and Operation of Air Contaminant Sources › Rule 17.8.770 - ADDITIONAL REQUIREMENTS FOR INCINERATORS

Current through Register Vol. 13, July 5, 2024
(1) An applicant for a Montana air quality
				permit for an incineration facility subject to
				75-2-215, MCA, shall submit a
				human health risk assessment protocol and a human health risk assessment as
				part of the application. The human health risk assessment must demonstrate that
				the ambient concentrations of pollutants resulting from emissions from the
				incineration facility subject to
				75-2-215, MCA, constitute no more
				than a negligible risk to the public health, safety, and welfare and to the
				environment. At a minimum, the human health risk assessment must meet the
				following requirements:
(a) The human health
				risk assessment must include an emissions inventory listing potential emissions
				of all pollutants specified in the Federal Clean Air Act Hazardous Air
				Pollutants List (as defined in section 112(b) of the FCAA) ;
(b) A characterization of emissions and
				ambient concentrations of air pollutants, including hazardous air pollutants,
				from any existing emitting unit at the facility must be submitted as part of
				the permit application;
(c) The
				human health risk assessment must address the impacts of all pollutants
				inventoried in (1) (a), except as provided in (1) (c) (i) and (ii). Pollutants
				may be excluded from the human health risk assessment if the department
				determines that exposure from inhalation is the only appropriate pathway to
				consider in the human health risk assessment and if:
(i) the potential to emit the pollutant is
				less than 1.28 x 10-13 grams per second, if the
				incineration facility subject to
				75-2-215, MCA, has a stack height
				of at least two meters, a stack velocity of at least 0.645 meters per second,
				and a stack exit temperature of at least 800° F, and there is a distance of
				at least five meters from the stack to the property boundary; or
(ii) the ambient concentrations of the
				pollutants (calculated using the potential to emit; enforceable limits or
				controls may be considered) are less than the levels specified in Table 1 or
				Table 2.
(iii) The department shall
				periodically review accepted toxicity value databases to determine if the de
				minimis levels in (1) (c) (i) and (ii) should be updated;
(d) The human health risk assessment must
				address risks from all appropriate exposure pathways. For incineration
				facilities subject to
				75-2-215, MCA, that do not emit or
				emit only minute amounts of hazardous air pollutants contained in Tables 4-1 or
				4-2 of the department's health risk assessment procedures/model the application
				need address only impact from the inhalation exposure pathway and may use a
				department supplied screening model to assess human health risk;
(e) The human health risk assessment must
				address the human health risk impact of all hazardous air pollutants, as
				described in (1) (a), from the emitting unit or units that constitutes the
				incineration facility subject to
				75-2-215, MCA, from all other
				existing incineration facilities subject to
				75-2-215, MCA, at the facility,
				and from all other new or existing emitting units solely supporting any
				incineration facility subject to
				75-2-215, MCA, such as fugitive
				emissions from fuel storage;
(i) Emissions
				from existing emitting units that partially support the incineration facility,
				but that do not change the type or amount of emissions allowed under any
				existing permit in effect at the time of the permit application, need not be
				considered in the human health risk assessment;
(ii) If an existing emitting unit, wholly or
				partially supporting the incineration facility, increases the types or amount
				of its emissions, so that a permit modification is required, that portion of
				the emissions increase attributable to the support of the incineration facility
				must be considered in the human health risk assessment;
(f) The health risk assessment must be
				performed in accordance with accepted human health risk assessment practices,
				or state or federal guidelines in effect at the time the human health risk
				assessment is performed, and must address impacts on sensitive populations. The
				human health risk must be calculated using the emitting unit's potential to
				emit. Enforceable limits or controls may be considered. The human health risk
				assessment procedures used may be modified if site-specific conditions warrant
				use of alternative procedures to appropriately assess human health
				risk;
(g) As part of the
				application, the applicant shall submit to the department a human health risk
				assessment protocol detailing the human health risk assessment procedures. At a
				minimum, the human health risk assessment protocol must include:
(i) a description of the pollutants
				considered in the analysis;
(ii)
				methods used in compiling the emission inventory;
(iii) ambient dispersion models and modeling
				procedures used;
(iv) toxicity
				values for each pollutant;
(v)
				exposure pathways and assumptions;
(vi) any statistical analysis applied;
				and
(vii) any other information
				necessary for the department to review the adequacy of the human health risk
				assessment;
(h) A
				summary of the human health risk assessment protocol must be included in the
				permit analysis. The summary must:
(i)
				clearly define the scope of the risk assessment;
(ii) describe the exposure pathways
				used;
(iii) specify any pollutants
				identified in the emission inventory that were not required to be included in
				the human health risk assessment;
(iv) state whether, and to what extent, the
				impacts of existing emissions, or the synergistic effect of combined
				pollutants, were considered in the final human health risk level calculated to
				determine compliance with the negligible risk standard; and
(v) state that environmental effects
				unrelated to human health were not considered in determining compliance with
				the negligible risk standard, but were evaluated as required by the Montana
				Environmental Policy Act, in determining compliance with all applicable rules
				or other requirements requiring protection of public health, safety, and
				welfare and the environment;
(i) The department may impose additional
				requirements for the human health risk assessment, on a case-by-case basis, if
				the department reasonably believes that the type or amount of material being
				incinerated, the proximity to sensitive populations, short-term emissions
				variations, acute health impact, or the local topographical or ventilation
				conditions require a more detailed health risk assessment to adequately define
				the potential public health impact. Additional requirements for the human
				health risk assessment may include specific emission inventory procedures for
				determining emissions from the incineration facility subject to
				75-2-215, MCA, use of more
				sophisticated air dispersion models or modeling procedures and consideration of
				additional exposure pathways.
TABLE 1
CAS #
CHEMICAL
CANCER ANNUAL (µg/m3)
75070
Acetaldehyde
4.5455e-02
79061
Acrylamide
7.6923e-05
107131
Acrylonitrile
1.4706e-03
1332214
Asbestos
5.1546e-04
71432
Benzene
1.2048e-02
92875
Benzidine
1.4925e-06
117817
Bis(2-Ethylhexyl) Phthalate (DEHP)
4.1667e-02
542881
Bis(Chloromethyl) Ether
1.6129e-06
75252
Bromoform
9.0909e-02
106990
1,3-Butadiene
3.5714e-04
56235
Carbon Tetrachloride
6.6667e-03
57749
Chlordane
2.7027e-04
67663
Chloroform
4.3478e-03
126998
Chloroprene
7.6923e-01
132649
Dibenzofurans
2.6316e-09
96128
1,2-Dibromo-3-Chloropropane
5.0000e-05
106467
1,4-Dichlorobenzene (p)
9.0909e-03
91941
3,3-Dichlorobenzidene
2.9412e-04
111444
Dichloroethyl Ether
3.0303e-04
123911
1,4-Dioxane (1,4-Diethyleneoxide)
1.2987e-02
122667
1,2-Diphenylhydrazine
4.5455e-04
106898
Epichlorohydrin
8.3333e-02
51796
Ethyl Carbamate (Urethane)
3.4483e-04
106934
Ethylene Dibromide
4.5455e-04
107062
Ethylene Dichloride
3.8462e-03
75218
Ethylene Oxide
1.1364e-03
50000
Formaldehyde
7.6923e-03
76448
Heptachlor
7.6923e-05
118741
Hexachlorobenzene
2.1739e-04
87683
Hexachlorobutadiene
4.5455e-03
67721
Hexachloroethane
2.5000e-02
302012
Hydrazine
2.0408e-05
58899
Lindane (All Isomers)
9.0909e-05
75092
Methylene Chloride
2.1277e-01
62759
N-Nitrosodimethylamine
7.1429e-06
87865
Pentachlorophenol
2.1739e-02
1336363
Polychlorinated Biphenyls
7.1429e-05
75569
Propylene Oxide
2.7027e-02
1746016
2,3,7,8-TCDD
2.6316e-09
79345
1,1,2,2-Tetrachloroethane
1.7241e-03
127184
Tetrachloroethylene (Perch)
1.6949e-02
8001352
Toxaphene
3.1250e-04
79005
1,1,2-Trichloroethane
6.2500e-03
79016
Trichloroethylene
5.0000e-02
88062
2,4,6-Trichlorophenol
3.2258e-02
75014
Vinyl Chloride
1.2821e-03
75354
Vinylidene Chloride
2.0000e-03
Arsenic Compounds
2.3256e-05
Beryllium Compounds
4.1667e-05
Cadmium Compounds
5.5556e-05
Chromium Compounds
8.3333e-06
Coke Oven Emissions
1.6129e-04
Nickel Compounds
3.8462e-04
Polycylic Organic Matter
56553
Benz(a)anthracene
5.8824e-05
205992
Benzo(b)fluoranthene
5.8824e-05
207089
Benzo(k)fluoranthene
5.8824e-05
50328
Benzo(a)pyrene
5.8824e-05
53703
Dibenz(a,h)anthracene
5.8824e-05
193395
Indeno(1,2,3-cd)pyrene
5.8824e-05
TABLE 2
CAS #
CHEMICAL
NONCANCER CHRONIC ANNUAL
							 (µg/m3)
NONCANCER ACUTE ANNUAL
							 (µg/m3)
75070
Acetaldehyde
9.0000e-02
107028
Acrolein
2.2000e-04
2.5000e-02
79061
Acrylamide
7.0000e-03
79107
Acrylic Acid
1.0000e-02
107131
Acrylonitrile
2.0000e-02
107051
Allyl Chloride
1.0000e-02
62533
Aniline
1.0000e-02
71432
Benzene
7.1000e-01
92875
Benzidine
1.0000e-01
100447
Benzyl Chloride
1.2000e-01
5.0000e-01
117817
Bis(2-Ethylhexyl) Phthalate
7.0000e-01
(DEHP)
75150
Carbon Disulfide
7.0000e+00
56235
Carbon Tetrachloride
2.4000e-02
1.9000e+00
7782505
Chlorine
7.1000e-01
2.3000e-01
532274
2-Chloroacetophenone
3.0000e-04
108907
Chlorobenzene
7.0000e-01
67663
Chloroform
3.5000e-01
126998
Chloroprene
1.0000e-02
1319773
Cresols/Cresylic Acid
1.8000e+00
95487
o-Cresol
1.8000e+00
108394
m-Cresol
1.8000e+00
106445
p-Cresol
1.8000e+00
132649
Dibenzofurans
3.5000e-08
96128
1,2-Dibromo-3-Chloropropane
2.0000e-03
106467
1,4-Dichlorobenzene (p)
8.0000e+00
542756
1,3-Dichloropropene
2.0000e-01
62737
Dichlorvos
5.0000e-03
68122
Dimethyl Formamide
3.0000e-01
123911
1,4-Dioxane (1,4-Diethyleneoxide)
4.0000e-02
2.0000e+01
106898
Epichlorohydrin
1.0000e-02
106887
1,2-Epoxybutane
2.0000e-01
140885
Ethyl Acrylate
4.8000e-01
100414
Ethyl Benzene
1.0000e+01
75003
Ethyl Chloride (Chloroethane)
1.0000e+02
106934
Ethylene Dibromide
4.6000e-02
107062
Ethylene Dichloride
9.5000e-01
75218
Ethylene Oxide
6.0000e+00
50000
Formaldehyde
3.6000e-02
3.7000e+00
118741
Hexachlorobenzene
2.8000e-02
77474
Hexachlorocyclopentadiene
2.4000e-03
822060
Hexamethylene-1,6-Diisocyanate
1.0000e-04
110543
Hexane
2.0000e+00
302012
Hydrazine
2.4000e-03
7647010
Hydrochloric Acid
2.0000e-01
3.0000e+01
7664393
Hydrogen Fluoride (HF Acid)
5.9000e-02
5.8000e+00
58899
Lindane (All Isomers)
1.0000e-02
108316
Maleic Anhydride
2.4000e-02
1.0000e-01
67561
Methanol
6.2000e+00
74839
Methyl Bromide
5.0000e-02
(Bromomethane)
71556
Methyl Chloroform
3.2000e+00
1.9000e+03
78933
Methyl Ethyl Ketone
1.0000e+01
(2-Butanone)
624839
Methyl Isocyanate
3.6000e-03
80626
Methyl Methacrylate
9.8000e+00
1634044
Methyl Tert Butyl Ether
3.0000e+01
75092
Methylene Chloride
3.0000e+01
3.5000e+01
101688
Methylene Diphenyl
2.0000e-04
Diisocyanate
101779
4,4'-Methylenedianiline
1.9000e-02
91203
Naphthalene
1.4000e-01
98953
Nitrobenzene
1.7000e-02
79469
2-Nitropropane
2.0000e-01
87865
Pentachlorophenol
2.0000e-03
108952
Phenol
4.5000e-01
75445
Phosgene
1.2000e+00
7803512
Phosphine
3.0000e-03
7723140
Phosphorus
7.0000e-04
85449
Phthalic Anhydride
7.0000e+01
1336363
Polychlorinated Biphenyls
1.2000e-02
78875
Propylene Dichloride
4.0000e-02
75569
Propylene Oxide
3.0000e-01
1.0000e+01
100425
Styrene
1.0000e+01
1746016
2,3,7,8-TCDD
3.5000e-08
127184
Tetrachloroethylene (Perch)
3.5000e-01
6.8000e+01
108883
Toluene
4.0000e+00
584849
2,4-Toluene Diisocyanate
7.0000e-04
79016
Trichloroethylene
6.4000e+00
121448
Triethylamine
7.0000e-02
108054
Vinyl Acetate
2.0000e+00
593602
Vinyl Bromide
3.0000e-02
75014
Vinyl Chloride
2.6000e-01
75354
Vinylidene Chloride
3.2000e-01
1330207
Xylenes (Isomers and Mixture)
3.0000e+00
4.4000e+01
Antimony Compounds
2.0000e-03
Arsenic Compounds
5.0000e-03
Beryllium Compounds
4.8000e-05
Cadmium Compounds
3.5000e-02
Chromium Compounds
2.0000e-05
Cyanide Compounds
7.0000e-01
3.3000e+01
Ethyl Glycol
2.0000e-01
But Ether
Ethyl Glycol
3.7000e+00
Ethyl Ether
Ethyl Gly MonoBut
1.5000e+01
Ether
Ethyl Gly Mono-
2.0000e+00
Ethyl Ether
Ethyl Gly Ethyl
6.4000e-01
Ether Acetate
Ethyl Glycol
2.0000e-01
3.2000e+00
Methyl Ether
Ethyl Gly Methyl
5.7000e-01
Ether Acetate
Ethyl Gly Mono-
1.6000e+01
Ethyl Ether Acetate
Lead Compounds
1.5000e-02
Manganese Compounds
5.0000e-04
Mercury Compounds
3.0000e-03
3.0000e-01
Fine Mineral
2.4000e-01
Fibers
Nickel Compounds
2.4000e-03
1.0000e-02
Selenium Compounds
5.0000e-03
2.0000e-02