Michigan Administrative Code
Department - Environmental Quality
Air Quality Division
Part 2 - AIR USE APPROVAL
Section R. 336.1291 - Permit to install exemptions; emission units with "de minimis" emissions

Universal Citation: MI Admin Code R. 336.1291

Current through Vol. 24-04, March 15, 2024

Rule 291.

(1) This rule does not apply if prohibited by R 336.1278 and unless the requirements of R 336.1278a have been met.

(2) The requirement of R 336.1201(1) to obtain a permit to install does not apply to any emission unit in which potential emissions meet the conditions listed in subdivisions (a) to (d) of this subrule and table 23 for all air contaminants listed. In addition, records shall be maintained in accordance with subdivisions (e) and (f) of this subrule.

(a) The combined potential emissions of all toxic air contaminants with screening levels greater than or equal to 0.04 micrograms per cubic meter and less than 2 micrograms per cubic meter shall not exceed 0.12 tons per year.

(b) The combined potential emissions of all toxic air contaminants with screening levels greater than or equal to 0.005 micrograms per cubic meter and less than 0.04 micrograms per cubic meter shall not exceed 0.06 tons per year.

(c) The combined potential emissions of all toxic contaminants with screening levels less than 0.005 micrograms per cubic meter shall not exceed 0.006 tons per year.

(d) The emission unit has no potential emissions of asbestos and/or subtilisin proteolytic enzymes.

(e) A description of the emission unit shall be maintained throughout the life of the unit.

(f) Documentation and/or calculations identifying the quality, nature, and quantity of the air contaminant emissions are maintained in sufficient detail to demonstrate that the potential emissions are less than those listed in subdivisions (a) to (d) of this subrule and Table 23. Such documentation shall include the toxic air contaminant screening level applicable at the time of installation and/or modification of the emission unit.

Table 23. Potential Emissions from Air Contaminants

Air Contaminant

Potential Emissions Not to be Exceeded

CO2 equivalent

75,000 tons per year

CO

10 tons per year

NOx

10 tons per year

SO2

10 tons per year

VOC (as defined in R 336.1122)

5 tons per year

PM

10 tons per year

PM-10

5 tons per year

PM-2.5

3 tons per year

Lead

0.1 tons per year

Fluorides

1 ton per year

Sulfuric acid mist

0.12 tons per year

Hydrogen sulfide

2 tons per year

Total reduced sulfur

2 tons per year

Reduced sulfur compounds

2 tons per year

Total mercury

0.12 pounds per year

Total toxic air contaminants not listed in table

5 tons per year

23 with any screening level

Total air contaminants not listed in table 23 that are non-carcinogenic and do not have a screening level

6 tons per year

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