Public Hearing — 7810 Andrews Street, NE, Suite 200, Moses Lake, Washington

NOTICE: ANNOUNCEMENT OF AVAILABILITY OF DRAFT PERMIT Permit Number: ST0008063 Applicant: Port of Moses Lake Facility Address: 7810 Andrews Street, NE, Suite 200 Moses Lake, Washington 98837 The Port of Moses Lake (Port) has applied for renewal State Waste Discharge Permit in accordance with the provisions of Chapter 90.48 Revised Code of Washington (RCW) and Chapter 173-216 Washington Administrative Code (WAC). The Port owns and operates an industrial wastewater collection and treatment system that collects process wastewater from several industrial users, stores the wastewater in a series of three lined ponds and seasonally applies wastewater to a 248-acre land treatment system from March 1 to November 1. The facility is designed for an average monthly design flow of 400,000 gallons per day (gpd) and a maximum daily flow of 900,000 gpd. The wastewater, following treatment, must meet the requirements of the Washington State Water Pollution Control Act and applicable regulations for the issuance of a permit. Following evaluation of the application and other available information, Ecology developed a draft permit that allows the discharge of wastewater with the appropriate permit limits and conditions. Ecology has made a tentative determination on the effluent limitations and special permit conditions that will prevent and control pollution. A final determination will not be made until all timely comments received in response to this notice have been evaluated. PUBLIC COMMENT AND INFORMATION The draft permit and related documents can be viewed online using PARIS1, Ecologys Permitting and Reporting Information System database or in person between the hours of 8:00 a.m. and 5:00 p.m. weekdays, by appointment only, at the regional office listed below. Please call (509) 329-3400 to make an appointment to request copies or arrange to view copies. Ecology invites interested persons to submit written comments regarding the proposed permit. Submit comments within 30 days after publication of this notice to be considered for the final determination. Comments must be received by our office no later than May 22, 2026. Send written comments to: Greg Dobb WQP-Department of Ecology Eastern Regional Office 4601 N. Monroe Street Spokane, Washington 99205 Link to eComment Form: https://ecology.commentinput.com?id=8C7NEZYSU (or scan QR code below) URL for event listing: https://ecykenpub/events/wq/waste-discharge-per mits-2e5ab73db877bfab36ddd36a6a436930/port-ofmoses-lake-public-notice Publication date & time: April 22, 2026,12;00 a.m.  May 22, 2026, 11:59 p.m. Any interested party may request a public hearing on the proposed permit within 30 days of the publication date of this notice. The request for a hearing shall state the interest of the party and the reasons why a hearing is necessary. Send the request to the address above. The Department will hold a hearing if it determines that there is significant public interest, if a hearing is scheduled, public notice will be published at least 30 days in advance of the hearing date. Any party responding to this notice with comments will receive a copy of a hearing public notice. Please bring this public notice to the attention of persons who you know would be interested in this matter. Ecology is an equal opportunity agency. If you need this publication in an alternate format, please contact us at (509) 329-3400 or TTY (for the speech and hearing impaired) at 711 or 1-800-833-6388 #04064/48652 Pub: April 22, 2026