STATE OF WISCONSIN DEPARTMENT OF NATURAL RESOURCES PUBLIC NOTICE OF INTENT TO MODIFY A WISCONSIN POLLUTANT DISCHARGE ELIMINATION SYSTEM (WPDES) PERMIT No.WI-0045942-07-1 Permittee: UWM SCHOOL OF FRESHWATER SCIENCES, 600 E Greenfield Ave, Milwaukee, WI, 53204 Facility Where Discharge Occurs: UWM School of Freshwater Sciences, 600 E Greenfield Ave, Milwaukee, WI Receiving Water And Location: Kinnickinnic River (Inner Harbor) (Kinnickinnic River Watershed – Milwaukee River Basin) in Milwaukee County Brief Facility Description: The permittee operates a fishery research facility where growth, behavioral, and physiological studies are performed. The source of wastewater being discharged from the facility is comprised of fish culture water and water used to clean the tanks. Outfall 001 discharges from the fisheries research lab. Outfall 002 discharges from the aquaculture research lab. Outfall 003 discharges from a newly constructed aquaculture training research lab. At this time, Outfall 003 is not discharging to surface waters and is using a recirculating water system. Outfall 004 is used for reporting of the combined effluent from Outfall 001, 002 and 003 for those parameters that require combined totals and/or testing of combined samples. Flow from each lab is estimated. The total flow is not measured but the estimated sum from each lab is reported at Outfall 004. The flow from all three labs is combined in the storm sewer prior to discharge at the end of Greenfield Ave. The laboratories share dechlorination and water temperature controls; the water may be heated or chilled to maintain proper temperature for the test species. The laboratories are also equipped with a hookup to the sanitary sewer for the discharge of any wastewater not suitable for discharge to surface water. For example, when fish must be treated with an additive that cannot be directly discharged to surface water, the discharge will be directed to the sanitary sewer. 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: Jacob Van Susteren-Wedesky, DNR, 1027 W St Paul Ave, Milwaukee, WI 53233, (414) 239-1480, jacob.vansusterenwedesky@wisconsin.gov Proposed Modification: The permit modification is proposed to reduce the effluent PFOS/PFOA sampling frequency from 1/ 2 months to annual, after a review of submitted data, pursuant to s. NR 205.066, Wis. Adm. Code. 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 LWIX0506058