NPDES Inspection Report - Pretreatment Categorical Industrial User National Database Information Inspection Entry Date/Time: August 15, 2022 / 15:45 Inspection Closing Date/Time: August 15, 2022 / 16:51 Inspection Type: Pretreatment Categorical Industrial User (CIU) NPDES ID Number: MTPF00104 Inspection ID: 202208_MTPF00104 Lead inspector and affiliation: Lisa-kay Prideaux / EPA Region 8 Montana Operations Office Inspector and affiliation: Emilio Llamozas / EPA Region 8 Facility Location Information (Name/Location/ Mailing Address) Site/Facility Name & Location: Boulder River Foundry 151 Centennial Drive Big Timber, Montana 59011 Mail Report (Electronic Delivery) to: Randy Rembold, Owner Boulder River Foundry randy@boulderriverfoundry.com 45.838424N; -109.940753W Contact Information Person/Company meeting definition of Owner/Operator Name(s)/Title Boulder River Foundry Randy Rembold / Boulder River Foundry / Owner (present during inspection) Kirk Bryan / Boulder River Foundry / Owner (not present) Facility Contacts: Robert Bryan / Boulder River Foundry / Owner (not present) Phyllis Bryan / Boulder River Foundry / Owner (not present) Lucinda Bryan / Boulder River Foundry / Owner (not present) Authorized Official(s) Randy Rembold / Boulder River Foundry / Owner Areas Evaluated During Inspection Permit Effluent/Receiving Waters Records/Reports Flow Measurement Facility Site Review Self-Monitoring Program Stormwater Operations and Maintenance Compliance Schedule Pollution Prevention Laboratory Pretreatment Boulder River Foundry - permit #MTPF000104 NPDES Pretreatment Categorical Industrial User Page 1 of 6 Report Review and Signature Drafter Name Date Prideaux, Prideaux, LisaKay Digitally signed by Date: 2022.10.13 09.22.2022 LisaKay 07:41:41 -06'00' Reviewer Name Date Emilio Llamozas 09/28/2022 Management Reviewer Signature Date MICHAEL BOEGLIN Digitally signed by MICHAEL BOEGLIN Date: 2022.10.13 07:09:00 -06'00' Michael Boeglin, NPDES and Wetlands Enforcement Section Supervisor Address/Phone Number U.S.

NPDES Inspection Report - Water Treatment Plant National Database Information Inspection Date: May 14, 2024 Inspection Type: Water Treatment Plant Entry/Exit Time: 14:00 / 15:10 NPDES ID Number: MTDW0005I NAICS Code: 221310 Inspection ID: 202405_MTDW0005I Lead inspector and affiliation: Lisa-kay Prideaux / US EPA Region 8 Inspector and affiliation: Akash Johnson / US EPA Region 8 Facility Location Information Site/Facility Name & Location: Hardin Water Treatment Plant 101 East 4th Street Hardin, Montana 59034 Facility: 45.7325975N; -107.6040161W Outfall: 45.732771N; -107.580924W Email Report to: Michael Hurff - Public Works Director City of Hardin publicworks@hardinmt.com Contact Information Site/Facility Contacts: Site/Facility Contacts: Site/Facility Contacts: Site/Facility Contacts: Person/Company meeting definition of "Operator" Indian Health Services Contact Tribal Government Contacts Name(s)/Title Michael Hurff / Public Works Director / City of Hardin / Present Trevor Lautt / Lead Water Treatment Operator / City of Hardin / not present during the inspection Merle Johns / 1B Water Operator / City of Hardin / Present Richard Jefferson / 1B Water Operator / City of Hardin / Present City of Hardin N/A Marvin (Wes) Stops, Jr. / Environmental Director / Crow Tribe / Not present Permit Information Is the permit on site and available?

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

22 SEPTEMBER 2023 Euroalliages reply to the public consultation on a proposed restriction on the manufacture, placing on the market and use of per- and polyfluoroalkyl substances (PFAS) I.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

The Dossier Submitters failed to explain which particular PFAS present which hazard properties and in turn, which properties lead to a risks for specific PFAS substances and related uses.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Joe was the lead MWWC operator for wastewater issues and indicated he held a wastewater collections operator certification from the State of South Dakota.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

Apr 25, 2023 Comment on Proposed Restriction of PFAS Conference of Fluoro-Chemical Product Japan (FCJ) On behalf of chemical manufacturers, we, Conference of Fluoro-Chemical Product Japan (FCJ), have been working tirelessly to comply with national chemical regulations.

May 19, 2023 Comment on Proposed Restriction of PFAS Japan Fluorocarbon Manufacturers Association On behalf of chemical manufacturers, we, Japan Fluorocarbon Manufacturers Association (JFMA), have been working tirelessly to comply with national chemical regulations.