R 336.1291 Permit to install exemptions; emission units with “de minimis” emissions.

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 23 with any screening level 5 tons per year Total air contaminants not listed in table 23 that are non-carcinogenic and do not have a screening level 6 tons per year