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Comment period

SGL Composites, Moses Lake

Air quality notice of construction application – Opportunity to request a public comment period

May 14, 2024 - May 31, 2024, 11:59 p.m.

We propose to approve SGL Composites’ air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

SGL Composites submitted a notice of construction application to allow use of a silicon precursor on all six facility production lines. The carbon fiber facility is located at 8781 Randolph Road NE, in Moses Lake.

This project will increase their permitted emissions:

  • Particulate matter (filterable) by 20.11 tons per year
  • Particulate matter (PM10) by 1.72 tons per year

Documents for review

We determined this proposal satisfies the requirements of Chapter 173-400 WAC. We plan to approve the application. We will hold a public comment period on a draft air permit ("approval order") that includes this change if we receive a written request by May 31, 2024.

To request a public comment period, 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 May 14, 2024


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 99205-1295
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Jenny Filipy
Environmental Engineer
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