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Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Revised Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 30 – Atlantic-1 Site Evaluation Summary Report (Dated October 24, 2025), Molly Roby Dec 2025

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Revised Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 30 – Atlantic-1 Site Evaluation Summary Report (Dated October 24, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Draft Final Quarterly Operations And Maintenance Report: Butte Treatment Lagoon System – Third Quarter 2025, Pioneer Technical Services, Inc. Dec 2025

Draft Final Quarterly Operations And Maintenance Report: Butte Treatment Lagoon System – Third Quarter 2025, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp) (Dated November 24, 2025), Emma Rott Dec 2025

Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft Interim Site-Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp) (Dated November 24, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft 2026 Interim Site-Wide Groundwater Monitoring Quality Assurance Project Plan (Qapp) (Dated November 18, 2025), Emma Rott Dec 2025

Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft 2026 Interim Site-Wide Groundwater Monitoring Quality Assurance Project Plan (Qapp) (Dated November 18, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Revised Draft Final Annual Operations And Maintenance (O&M) Report: Butte Treatment Lagoon (Btl) System - 2023 (Dated October 29, 2025), Emma Rott Dec 2025

Re: Approval Letter For The Revised Draft Final Annual Operations And Maintenance (O&M) Report: Butte Treatment Lagoon (Btl) System - 2023 (Dated October 29, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Revised Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Annual Operations, Maintenance, And Monitoring (Om&M) Plan – 2023 (Dated October 29, 2025), Emma Rott Dec 2025

Re: Approval Letter For The Revised Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Annual Operations, Maintenance, And Monitoring (Om&M) Plan – 2023 (Dated October 29, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc. Dec 2025

Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc. Dec 2025

Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 50 – Zelia Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 50 – Zelia Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Butte Treatment Lagoons (Btl) Groundwater Treatment System Routine Operations, Maintenance, And Monitoring (Om&M) Plan, Pioneer Technical Services, Inc. Dec 2025

Final Butte Treatment Lagoons (Btl) Groundwater Treatment System Routine Operations, Maintenance, And Monitoring (Om&M) Plan, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-22 Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-22 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Quarterly Operations And Maintenance Report Butte Treatment Lagoon System – Second Quarter 2024, Pioneer Technical Services, Inc. Dec 2025

Final Quarterly Operations And Maintenance Report Butte Treatment Lagoon System – Second Quarter 2024, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Final Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 1 2024 (Dated August 14, 2025), Emma Rott Dec 2025

Re: Approval Letter For The Final Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 1 2024 (Dated August 14, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 2 2025 (Dated September 30, 2025), Emma Rott Dec 2025

Re: Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 2 2025 (Dated September 30, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-12 Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-12 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Quarterly Operations And Maintenance Report Butte Treatment Lagoon System – First Quarter 2024, Pioneer Technical Services, Inc. Dec 2025

Final Quarterly Operations And Maintenance Report Butte Treatment Lagoon System – First Quarter 2024, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 96 – Washoe Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 96 – Washoe Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Butte Priority Soils Operable Unit Clark Tailings Consolidated Waste Management Area 2019-2023 Data Summary Report And Response To Epa Comments (Dated September 24, 2025), Emma Rott Dec 2025

Re: Approval Letter For The Butte Priority Soils Operable Unit Clark Tailings Consolidated Waste Management Area 2019-2023 Data Summary Report And Response To Epa Comments (Dated September 24, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-06 Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-06 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Final Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 2 2024 (Dated August 19, 2025), Emma Rott Dec 2025

Re: Approval Letter For The Final Butte Priority Soils Operable Unit (Bpsou) Butte Treatment Lagoons (Btl) Groundwater Treatment System Quarterly Operation And Maintenance Report – Quarter 2 2024 (Dated August 19, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 16 Site Evaluation Summary Report, Pioneer Technical Services, Inc. Dec 2025

Draft Final 2022 Insufficiently Reclaimed Sites Sampling: Bres No. 16 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Final Data Summary Report 2019 Surface Water, Groundwater Seep, And Soil Characterization 2021-2023 Surface Water And Groundwater Seep Evaluation 2023 Waterloo Aps Soil And Groundwater Evaluation, Woodard & Curran Dec 2025

Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Final Data Summary Report 2019 Surface Water, Groundwater Seep, And Soil Characterization 2021-2023 Surface Water And Groundwater Seep Evaluation 2023 Waterloo Aps Soil And Groundwater Evaluation, Woodard & Curran

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Conditional Approval Letter For The Final Butte Mine Waste Repository Geotechnical Investigation Work Plan (Dated November 14, 2025), Emma Rott Nov 2025

Re: Conditional Approval Letter For The Final Butte Mine Waste Repository Geotechnical Investigation Work Plan (Dated November 14, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Butte Priority Soils Operable Unit (Bpsou) Insufficiently Reclaimed Sites Remedial Action Work Plan (Rawp): Bres No. 104 (Colorado Dump) North Slope, Pioneer Technical Services, Inc. Nov 2025

Final Butte Priority Soils Operable Unit (Bpsou) Insufficiently Reclaimed Sites Remedial Action Work Plan (Rawp): Bres No. 104 (Colorado Dump) North Slope, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Butte Medical Monitoring Working Group Meeting, Mike Mcanulty, Eric Hassler Nov 2025

Butte Medical Monitoring Working Group Meeting, Mike Mcanulty, Eric Hassler

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Comment Letter For Diggings East 95 % Remedial Design Package Submittal (Dated August 29, 2025), The Silver Bow Creek Conservation Area (Sbcca) – 95 Percent Programmatic Technical Specifications Submittal (Dated August 19, 2025), The Draft Final Sbcca Construction Quality Assurance Plan (Dated August 20, 2025) And The Butte Priority Soils Sbcca Operations And Maintenance (O&M) Plan (Dated August 14, 2025), Emma Rott Nov 2025

Re: Comment Letter For Diggings East 95 % Remedial Design Package Submittal (Dated August 29, 2025), The Silver Bow Creek Conservation Area (Sbcca) – 95 Percent Programmatic Technical Specifications Submittal (Dated August 19, 2025), The Draft Final Sbcca Construction Quality Assurance Plan (Dated August 20, 2025) And The Butte Priority Soils Sbcca Operations And Maintenance (O&M) Plan (Dated August 14, 2025), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Unreclaimed Sites Ur-46 Temporary Best Management Practices Work Plan (Dated October 17, 2025), Molly Roby Nov 2025

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Unreclaimed Sites Ur-46 Temporary Best Management Practices Work Plan (Dated October 17, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Remedial Action Work Plan (Rawp): Bres No. 104 – (Colorado Dump) North Slope (Dated October 17, 2025), Molly Roby Nov 2025

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Remedial Action Work Plan (Rawp): Bres No. 104 – (Colorado Dump) North Slope (Dated October 17, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc. Nov 2025

Final Butte Mine Waste Repository Geotechnical Investigation Work Plan, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


2025 Field Evaluation Of Reclaimed Sites Summary Report, Butte-Silver Bow Department Of Reclamation And Environmental Services Nov 2025

2025 Field Evaluation Of Reclaimed Sites Summary Report, Butte-Silver Bow Department Of Reclamation And Environmental Services

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.