New York State Department of Environmental Conservation Notice of Complete Application Date: 11/25/2025 Applicant: NYS OFFICE OF PARKS REC & HISTORIC PRESERVATION 625 Broadway ALBANY, NY 12207-0189 Facility: LAKE SEBAGO WWTP 488 SEVEN LAKES DR POMONA, NY 10970 Application IDs: 3-9903-00135/00001 3-9903-00107/00014 Permits(s) Applied for: 1 - Article 17 Titles 7 & 8 P/C/I SPDES - Surface Discharge 1- Section 401 - Clean Water Act Water Quality Certification Project is located: in SEVERAL COUNTIES in THIS REGION Project Description: Application ID: 3-9903-00135/00001 The Department has prepared a draft permit and has made a tentative determination, subject to public comment or other information, to approve a proposed 0.05MGD wastewater treatment plant (WWTP) with discharge of treated sanitary wastewater to Lake Sebago (Class A, Waters Index # NJ-12-6-P1002E). The WWTP will provide tertiary treatment with a biological active filter treatment process at the applicant's facility address located at Lake Sebago in Harriman State Park. The applicant plans to rehabilitate the Lake Sebago beach area, including the bathhouse, park buildings, wastewater treatment plant, parking areas and tent sites. The draft SPDES permit with fact sheet is 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 the application number listed above and SPDES Number NY0145220. Application ID: 3-9903-00107/00014 The applicant proposes disturbance within Lake Sebago (Class A, Waters Index # NJ-12-6-P1002E) and Stillwater Creek (Class B, Waters Index # NJ-12-6-P1002E-3) associated with restoration activities within the beach and swimming area, removal of the New Sebago Beach Dam (NYS ID 196-1282) and daylighting of a portion of Stillwater Creek, creation and restoration of wetlands, and installation of an outfall for the wastewater treatment system. In total, these proposed activities will require approximately 775 cubic yards (CY) of excavation and 2,100 CY of fill within Waters of the United States. All work will occur while the Lake Sebago water level is drawn down, which is an annual occurrence. Sediment and erosion control measures will also be employed. 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: Project is a Type I action and will not have a significant effect on the environment. A coordinated review with other involved agencies was performed and a Negative Declaration is on file. SEQR Lead Agency: NYS Office of Parks Recreation & Historic Preservation State Historic Preservation Act (SHPA) Determination: A cultural resources survey has been completed and cultural resources were identified. Based on information provided in the survey report, the New York State Office of Parks, Recreation and Historic Preservation (OPRHP) has determined that the proposed activity will have no adverse impact on registered or eligible archaeological sites or historic structures. 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: Contact Person: Comments on this project must be ELLEN M HART submitted in writing to the Contact NYSDEC Person no later than 01/02/2026 21 S Putt Corners Rd or 30 days after the publication date New Paltz, NY 12561 of this notice, whichever is later. (845) 256-3051 dep.r3@dec.ny.gov December 5 2025 LNYS0417449