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Comment Period

VoltaGrid Electric Generation Plant, Quincy

Air quality notice of construction application

July 7, 2026, 12 a.m. - Aug. 13, 2026, 11:59 p.m. PT

We propose to approve VoltaGrid Electric Generation Plant's air quality notice of construction (NOC) application.

VoltaGrid submitted a notice of construction application for their site located east of Road O NW and north of Road L NW, in Quincy (Parcel 0401414050 at Section 4, Township 20 N, Range 24 E).  VoltaGrid supplies affordable, ready-to-use clean power and fuel solutions for both remote locations and sites connected to the electricity grid.

VoltaGrid is proposing to install 14 prime power natural gas generators, 30 megawatts (MWe) total power supply. VoltaGrid plans to install air pollution control equipment to the generators. This includes selective catalytic reduction controls for nitrogen oxides, and oxidation catalyst controls for carbon monoxide and volatile organic compounds.

Emission increases from this project include:

  • 41 tons per year carbon monoxide (CO)
  • 10 tons per year volatile organic compounds (VOCs) 
  • 8.8 tons per year particulate matter (PM)
  • 8.7 tons per year nitrogen oxides (NOx)
  • 6.3 tons per year formaldehyde (CH₂O)
  • 6.2 tons per year sulfur dioxide (SO₂)

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 22, 2026, 11:59 p.m.)
Monday, August 10, 2026, 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 22, 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 by August 13, 2026, use one of the ways listed below.

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

This notice was posted on July 7, 2026.

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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Jenny Filipy
Washington Department of Ecology Eastern Regional Office
4601 North Monroe Street
Spokane, WA 99205-1265
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Questions

Jenny Filipy
Environmental Engineer
jenny.filipy@ecy.wa.gov
509-405-2487
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