Department of
Environmental Quality

Note: Before filling out Form EXPT, first watch the video demos below on using the form. These short videos will show you how to correctly fill out the form.

The Rules for the Control of Air Pollution in Idaho (IDAPA 58.01.01.220-223) allow owners or operators to exempt certain sources from the requirement to obtain a permit to construct (PTC). The resources below are provided to help facilities prepare and maintain their exemption documentation in support of a PTC exemption.

Form EXPT is a tool to assist facilities to make exemption decisions and is not a mandatory form. Facilities can use and keep Form EXPT on site to support a self-exemption determination or submit Form EXPT to DEQ for a PTC exemption concurrence.

Note: PTC exemption does not release the emissions unit from compliance with all other applicable federal (for example, NSPS, Tier I operating permit), state, or local laws, regulations, permits, or ordinances.

Exemption Form

• Form EXPT
  Open form and save to your computer before completing.

Supporting Documentation

• Emissions Increase of the Project
• Emissions of Each Emissions Unit Involved
• Total Emissions from the Source
• Uncontrolled Ambient Concentration of Toxic Air Pollutants (TAPs)
• Complete Project Description
• Exemption Criteria and Reporting Requirements for TAP Emissions Checklist

Video Demos on Using Form EXPT

• How to Use Form EXPT (2 minutes, 31 seconds)
• Items 1-8 (3 minutes, 19 seconds)
• Printing Spreadsheets (1 minute, 51 seconds)
• Items 9-12 (2 minutes)
• Finishing Form EXPT (1 minute, 25 seconds)
• Video Slides in PDF Format