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Comment period

Simplot-Rainier Plant, Moses Lake

Air quality notice of construction application

July 8, 2025, 12 a.m. - Aug. 15, 2025, 11:59 p.m. PT

We propose to approve Simplot-Rainier's air quality notice of construction (NOC) application.

Simplot-Rainier submitted a notice of construction application for an existing permitted potato processing facility located at 2107 Road O NE, Moses Lake, in Grant County. This proposed project makes changes to some of the equipment already permitted. Simplot-Rainier requested to:

  • install a wet electrostatic precipitator to control particles from fryer equipment
  • add controls to reduce sulfur in the biogas that comes from their current process water digester

Emission increases from this project include:

  • 26.2 tons per year nitrogen oxides (NOx)
  • 26.2 tons per year carbon monoxide (CO)
  • 28.8 tons per year particulate matter (PM)
  • 99.8 tons per year volatile organic compounds (VOCs)

Documents for review

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

Tentative public hearing

(if requested by July 23, 2025, 11:59 p.m.)
Tuesday, August 12, 2025, 6 p.m. online

We will hold a public hearing online if there is significant public interest. If we do not receive significant written requests for a public hearing by July 23, 2025, 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.

To comment by August 15, 2025, use one of the ways listed below.

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

This notice was posted on July 8, 2025.

Background

A notice of construction permit is required before installing a new source of air pollution or modifying an existing source of air pollution. This permit is sometimes called a "pre-construction permit" because a business must have one before starting construction or operating their business.

A notice of construction air permit limits the amount of air pollutants a business can emit.

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Comment by mail

Jenny Filipy
Washington Department of Ecology Eastern Regional Office
4601 North Monroe Street
Spokane, WA 99205-1295
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Questions

Jenny Filipy
Environmental Engineer
509-405-2487
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