STATE OF WISCONSIN DEPARTMENT OF NATURAL RESOURCES PUBLIC NOTICE OF INTENT TO MODIFY A WISCONSIN POLLUTANT DISCHARGE ELIMINATION SYSTEM (WPDES) PERMIT No.WI-0061891-04-1 Permittee: Wisconsin Public Service Corp, 310 E Frontage Rd, Kaukauna, WI 54130-9674 Facility Where Discharge Occurs: Wisconsin Public Service Corp Fox Energy Center, NEQ Sec 27 T22N R18E and W1/2 Sec 4 T21N R19E Receiving Water And Location: Lower Fox River, located in the Plum Creek-Fox River Watershed in the Lower Fox River Basin Brief Facility Description: The Fox Energy Center is a natural gas-fired combined cycle power generating facility that consists of two combustion turbines with a common steam turbine generator. The facility uses treated effluent from the Heart of the Valley Metropolitan Sewerage District (HOV WWTF) to supply the facility's non-potable process water and cooling water needs. Permit Drafter's Name, Address, Phone and Email: Sarah Donoughe, DNR, 2984 Shawano Ave, Green Bay, WI, 54313-6727, (920) 366-6076, Sarah.Donoughe@wisconsin.gov Basin Engineer's Name, Address, Phone and Email: Barti Oumarou, DNR, 625 E County Road Y, Suite 700, Oshkosh, WI 54901, (920) 424-4013, Barti.Oumarou@wisconsin.gov Proposed Modification: The Department has made the determination that this facility has reasonable potential to cause or contribute to an exceedance of the PFOS standard in s. NR 102.04(8)(d)1., Wis. Adm. Code. Language has been added to the permit requiring the implementation of a PFOS and PFOA Minimization Plan. The Department has tentatively decided that the above-specified WPDES permit should be modified. Persons wishing to comment on or object to the proposed permit action, or to request a public hearing, may write to the Department of Natural Resources at the above-named permit drafter's address. All comments or suggestions received no later than 30 days after the publication date of this public notice will be considered along with other information on file in making a final decision regarding the permit. Anyone providing comments in response to this public notice will receive a notification of the Department's final decision when the permit is issued. Where designated as a reviewable surface water discharge permit, the U.S. Environmental Protection Agency is allowed up to 90 days to submit comments or objections regarding this permit determination. If no comments are received on the proposed permit from anyone, including U.S. EPA, the permit will be issued as proposed. The Department may schedule a public informational hearing if requested by any person and shall schedule a public informational hearing if a petition requesting a hearing is received from 5 or more persons or if response to this notice indicates significant public interest pursuant to s. 283.49, Wis. Stats. Requests for a public informational hearing shall state the following: the name and address of the person(s) requesting the hearing; the interest in the proposed permit of the person(s) requesting the hearing; the reasons for the request; and the issues proposed to be considered at the hearing. Information on file for this permit action, including the draft permit, fact sheet and permit application, may be inspected and copied at either the above-named permit drafter's office or the above named basin engineer's office, Monday through Friday (except holidays), between 9:00 a.m. and 3:30 p.m. Please call the permit drafter or basin engineer for directions to their office location, if necessary. Information on this permit action may also be obtained by calling the permit drafter at (920) 366-6076 or by writing to the Department. Reasonable costs (15 cents per page for copies and 7 cents per page for scanning) will be charged for information in the file other than the public notice, permit and fact sheet. Permit information is also available on the internet at: http://dnr.wi.gov/topic/wastewater/PublicNotices.html . Pursuant to the Americans with Disabilities Act, reasonable accommodation, including the provision of informational material in an alternative format, will be made to qualified individuals upon request. WNAXLP April 30 2026 LWIX0506064