Michigan Administrative Code
Department - Environmental Quality
Air Quality Division
Part 2 - AIR USE APPROVAL
Section R. 336.1226 - Exemptions from health-based screening level requirement
Current through Vol. 24-04, March 15, 2024
Rule 226. The health-based screening level requirement provided in R 336.1225(1) does not apply to any of the following:
(a) Emissions of a toxic air contaminant that meet both of the following requirements:
Table 20. List of High Concern Toxic Air Contaminants
CHEMICAL NAME |
CAS NUMBER |
2,4,6-trinitrotoluene (TNT) |
118-96-7 |
2-diethylaminoethanol |
100-37-8 |
Acrolein |
107-02-8 |
allyl chloride |
107-05-1 |
alpha chloroacetophenone |
532-27-4 |
alpha-amylase |
9000-90-2 |
antimony compounds1 |
|
Arsine |
7784-42-1 |
barium compounds1 |
|
Biphenyl |
92-52-4 |
Bromine |
7726-95-6 |
chlorine dioxide |
10049-04-4 |
chlormadinone acetate |
302-22-7 |
chlorpyrifos |
2921-88-2 |
cobalt compounds1 |
|
Colophony |
8050-09-7 |
dibromochloropropane |
96-12-8 |
dibutyltin oxide |
818-08-6 |
Dichlorvos |
62-73-7 |
diisocyanate compounds1,2 |
|
dimethyl sulfate |
77-78-1 |
glutaraldehyde |
111-30-8 |
halogenated dimethylhydantoin compounds3 |
|
isocyanate compounds1,4 |
|
maleic anhydride |
108-31-6 |
manganese compounds1 |
|
melengesterol acetate |
2919-66-6 |
mercury compounds1 |
|
octachlorostyrene |
29082-74-7 |
osmium tetroxide |
20816-12-0 |
pentachlorobenzene |
608-93-5 |
platinum soluble salt |
7440-06-4 |
selenium compounds1 |
|
Subtilisins (proteolytic enzymes)5 |
|
sulfuric acid (including sulfur trioxide and oleum) |
7664-93-9 |
tetrachlorobenzene compounds6 |
|
thallium compounds1 |
|
Vanadium pentaoxide |
1314-62-1 |
1 These listings include any unique chemical substance that contains the named chemical (for example, antimony, barium, cobalt, diisocyanate, isocyanate, manganese, mercury, selenium, and thallium) as part of the chemical structure.
2 Diisocyanate compounds include compounds with 2 of the isocyanate functional groups (-CNCO).
3 Halogenated dimethylhydantoin compounds includes those compounds with a hydantoin infrastructure (NHC0NHC0CH2) substituted by 2 methyl groups at the 5 position on the ringed structure and halogens at the 1 or 3 position or the 1 and 3 position.
4 Isocyanate compounds includes compounds with 1 or more of the isocyanate functional groups (CNCO).
5 Subtilisins (proteolytic enzymes) includes any members of the group of proteolytic enzymes derived from Bacillus subtilis or closely related organisms.
6 Tetrachlorobenzenes includes compounds that consist of a benzene ring substituted with 4 chlorine atoms.
(b) An emission unit or units for which standards have been promulgated under section 112(f) of the clean air act for hazardous air pollutants listed under section 112(b) of the clean air act.
(c) Air contaminants and emission units that are regulated by the following national emission standards for hazardous air pollutants, 40 C.F.R. part 61:
(d) Emissions of a toxic air contaminant if it is demonstrated, on a case-by-case basis, to the satisfaction of the department, that the proposed new or modified emission unit or units will not cause or contribute to a violation of the provisions of R 336.1901. The demonstration shall include all relevant scientific information such as the following:
(e) Engines, turbines, boilers, and process heaters burning solely natural gas, diesel fuel (No. 2 fuel oil), or biodiesel, of up to 100 MMBTU per hour, provided that the effective stack is vertical and unobstructed and is at least 1.5 times the building height, and the building setback is at least 100 feet from the property line.
(f) Natural gas fuel burning equipment or natural gas fired equipment that meet all the following:
(g) Air pollution control equipment that combusts only natural gas as fuel.
An obvious error in R 336.1226 was corrected at the request of the promulgating agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule containing the error was published in Michigan Register, 2019 MR 1. The memorandum requesting the correction was published in Michigan Register, 2019 MR 1