New York State Department of Environmental Conservation Notice of Complete Application Date: 02/20/2026 Applicant: NYC DEPT OF ENVIRONMENTAL PROTECTION 96-05 HORACE HARDING EXPY FL 5 CORONA, NY 11368 Facility: KENSICO EASTVIEW TUNNEL BETWEEN KENSICO RESERVOIR & UV WTP OSSINING, NY 10562 Application ID: 3-5534-00369/00009 Permits(s) Applied for: 1 - Article 15 Title 15 Water Withdrawal Non-public 1 - Article 17 Titles 7 & 8 Industrial SPDES - Surface Discharge Project is located: in MOUNT PLEASANT in WESTCHESTER COUNTY Project Description: The Department has prepared a draft permit and has made a tentative determination, subject to public comment or other information, to approved a proposed discharge of 2.129 million gallons per day of treated industrial wastewater to Mine Brook, WIN H-4-13, Class C, from a temporary filtration treatment plant at the applicant's KEC Eastview Site, located at 15 Walker Road, Valhalla, Town of Mount Pleasant, Westchester County. Construction activities at the KEC Eastview Site are associated with the Kensico-Eastview Connection Project, to increase flow at the Catskill/Delaware Ultraviolet Disinfection Facility, and to improve NYCDEP's ability to maintain Hillview Reservoir water surface levels. Specific construction activities at the KEC Eastview Site include the KEC Tunnel, KEC Shaft 2C, Tail and Starter Tunnels, and Support of Excavation (SOE) for the Eastview Connection Chamber. These construction activities require excavation dewatering and discharge. Excavation dewatering will generate industrial wastewaters that require treatment prior to discharge. To support the discharge, temporary treatment plants and outfalls will be constructed at the site. The withdrawal of a supply of water up to 4,330,000 gallons per day (GPD) is proposed associated with temporary construction dewatering. The draft SPDES permit with fact sheet are available online at https://dec.ny.gov/fs/projects/draftpermits. The draft permit files are contained within regional folders and named by the SPDES number contained in this notice. Requests for a legislative (public statement) hearing must be sent in writing to the DEC contact person below by the comment deadline. The Department assesses such requests pursuant to 6 NYCRR Section 621.8. Refer to this application by application number listed above and SPDES Number NY0282014. Availability of Application Documents: Filed application documents, and Department draft permits where applicable, are available for inspection during normal business hours at the address of the contact person. To ensure timely service at the time of inspection, it is recommended that an appointment be made with the contact person. State Environmental Quality Review (SEQR) Determination: A final environmental impact statement has been prepared on this project and is on file. SEQR lead Agency NYC Dept of Environmental Protection State Historic Preservation Act (SHPA) Determination: A cultural resources survey has been completed. The report of the survey is on file. No archaeological sites or historic structures were identified at the project location. No further review in accordance with SHPA is required. DEC Commissioner Policy 29, Environmental Justice and Permitting (CP-29) The proposed action is subject to CP-29. Availability for Public Comment: Comments on this project must be submitted in writing to the Contact Person no later than 03/27/2026 or 30 days after the publication date of this notice, whichever is later. Contact Person: Tracey L O'Malley NYSDEC 21 S Putt Corners Rd New Paltz, NY 12561 (845) 256-3059 February 27 2026 LNYS0466837