Three draft air quality general orders

We propose to update three air quality general orders:

• Asphalt plants heat and mix stone and sand with liquid asphalt to make pavement for roads and parking lots.
• Concrete batch plants move and release a concrete mix into trucks so it can be hauled to a job site.
• Rock crushers crush, screen, sort, move, and load rock.

These requirements are designed to make sure that any increase in air pollution from a new or modified source of air pollutants is minimized.

Documents for review:

• Asphalt plants
  • Draft general order
  • Draft technical support document
  • SEPA determination of nonsignificance (DNS)
  • SEPA environmental checklist
• Concrete batch plants
  • Draft general order
  • Draft technical support document
  • SEPA determination of nonsignificance (DNS)
  • SEPA environmental checklist
• Rock crushers
  • Draft general order
  • Draft technical support document
  • SEPA determination of nonsignificance (DNS)
  • SEPA environmental checklist

We determined this proposal satisfies the requirements of Chapter 173-400 WAC. We plan to approve the general orders.

Tentative public hearing

(if requested by July 5, 2026, 11:59 p.m.)
Wednesday, July 8, 2026, 9 a.m. online

We will hold a public hearing online if there is significant public interest. A request for a public hearing must explain the interest of the entity/person asking for it and why a public hearing should occur. If we do not receive significant written requests for a public hearing by July 5, 2026, then the online public hearing will be cancelled. We will update this web page cancelling the public hearing or with a link to the public hearing. If you request a public hearing, please tell us if you need interpretation in a language other than English.

To comment or request a public hearing, use one of the ways to comment listed below.

To find out if there are more records for this project, contact our Public Records Office.

This notice was posted on June 2, 2026.

Background

An air quality general order is a group permit that simplifies the air permitting process. When multiple sources of air pollution are alike, we can issue a single “general order” for qualifying facilities in that group instead of issuing an individual permit for each one. Facilities in the group that don’t qualify for a general order can still get a permit, but they need to apply through a more extensive permitting process.