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Silver Bow Creek/Butte Area Superfund Site

Submissions from 2024 2024

Draft Final 2022 Unreclaimed Sites Sampling UR-13 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 BPSOU Subdrain Data Summary Report (DSR), Pioneer Technical Services, Inc.

Draft Final 2023 Residential Metals Abatement Program (RMAP) Whitehall Borrow Submittal #2, Pioneer Technical Services, Inc.

Draft Final 2024 Butte Priority Soils Operable Unit Helehan Borrow Submittal #2, Pioneer Technical Services, Inc.

Draft Final 2024 Butte Priority Soils Operable Unit Type B Borrow Material Submittal #2, Pioneer Technical Services, Inc.

Draft Final 2024 Residential Metals Abatement Program (RMAP) Brown’s Gulch Borrow Submittal #1, Pioneer Technical Services, Inc.

Draft Final 2024 Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) Annual Update (Non-Residential Parcels and Residential Daycares), Pioneer Technical Services, Inc.

Draft Final Annual Operations and Maintenance (O&M) Report: Butte Treatment Lagoon (BTL) System – 2023, Pioneer Technical Services, Inc.

Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

Draft Final BPSOU Insufficiently Reclaimed Sites Belle of Butte (BRES No. 8 & UR-39) Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Draft Final BPSOU Unreclaimed Sites Anderson Shaft Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

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

Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Fourth Quarter 2023, Pioneer Technical Services, Inc.

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

Draft Final Revised 2024 Residential Metals Abatement Program (RMAP) Walkerville Park (Alley of North Main and Alley of West Daly) Soil Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Draft Final Revised Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) (Residential Parcels), Pioneer Technical Services, Inc.

Draft Final Revised Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) (Residential Parcels), Pioneer Technical Services, Inc.

Final 2022 Insufficiently Reclaimed Sites Sampling BRES No. 08 – Belle of Butte Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Final 2023 Butte Priority Soils Operable Unit Type B Borrow Material Submittal #1, Pioneer Technical Services, Inc.

Final 2024 Butte Priority Soils Operable Unit Helehan Borrow Submittal #2, Pioneer Technical Services, Inc.

Final 2024 Butte Priority Soils Operable Unit Type B Borrow Material Submittal #2, Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Baptist Student Union (former McKinley School) Soil Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Brown’s Gulch Borrow Submittal #1, Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #14 [Silver Bow Homes Park, Butte KOA, Fairmont RV Park, and CCCS Gymnasium], Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) Annual Update (Non-Residential Parcels and Residential Daycares), Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Walkerville Park (Alley of North Main and Alley of West Daly) Soil Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Whitehall Borrow Submittal #2, Pioneer Technical Services, Inc.

Final 2024 Residential Metals Abatement Program (RMAP) Whitehall Borrow Submittal #2, Pioneer Technical Services, Inc.

Final Blacktail Creek Remediation and Contaminated Groundwater Hydraulic Control Site Pumping Test Data Summary Report (DSR), Pioneer Technical Services, Inc.

Final BPSOU Insufficiently Reclaimed Sites Belle of Butte (BRES No. 8 & UR-39) Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Final Butte Priority Soils Operable Unit (BPSOU) Unreclaimed (UR) Sites: UR-35 Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Final Butte Priority Soils Operable Unit Repository Screening Report, Pioneer Technical Services, Inc.

Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – First Quarter 2022, Pioneer Technical Services, Inc.

Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – First Quarter 2023, Pioneer Technical Services, Inc.

Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Fourth Quarter 2022, Pioneer Technical Services, Inc.

Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Second Quarter 2022, Pioneer Technical Services, Inc.

FINAL REPOSITORY SCREENING REPORT, Pioneer Technical Services, Inc.

Final Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) (Residential Parcels), Pioneer Technical Services, Inc.

Final West Side Soils Operable Unit Remedial Investigation Sampling Data Summary Report, Pioneer Technical Services, Inc.

Revised Draft Final 2024 Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) Annual Update (Non-Residential Parcels and Residential Daycares), Pioneer Technical Services, Inc.

Revised Draft Final BPSOU Insufficiently Reclaimed Sites Belle of Butte (BRES No. 8 & UR-39) Remedial Action Work Plan (RAWP), Pioneer Technical Services, Inc.

Revised Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Fourth Quarter 2022, Pioneer Technical Services, Inc.

Revised Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Second Quarter 2023, Pioneer Technical Services, Inc.

Revised Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Third Quarter 2023, Pioneer Technical Services, Inc.

Berkeley Pit and Discharge Pilot Project Discharge System Operations Assurance Plan 2024 Update, Revision 1, Pioneer Technical Services, Inc. and WSP Environment & Infrastructure, Inc.

Approval of: Berkeley Pit and Discharge Pilot Project, Discharge System Operations and Maintenance Manual, 2024 Update , dated April 23, 2024, Jason Rappe

Approval of: Discharge System 2023 Annual Operations and Maintenance Report, Berkeley Pit and Discharge Pilot Project, dated May 20, 2024, Jason Rappe

EPA Remedial Project Manager Change, Berkeley Pit/Mine Flooding Operable Unit (BMFOU) of the Silver Bow Creek/Butte Area and Consent Decree for the Mine Flooding Site, CV 02-35-BU-RFC, Jason Rappe

EPA Remedial Project Manager Change, Rocker Operable Unit of the Silver Bow Creek/Butte Are, Civil Action No 89-39-BU-PGH, Jason Rappe

RE: EPA Remedial Project Manager Change, Berkeley Pit/Mine Flooding Operable Unit (BMFOU) of the Silver Bow Creek/Butte Area and Consent Decree for the Mine Flooding Site, CV 02-35-BU-RFC, Jason Rappe

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2024 Draft Final Insufficiently Reclaimed Areas Quality Assurance Project Plan (QAPP) (dated March 8, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Residential Metals Abatement Program (RMAP) Brown’s Gulch Borrow Submittal #1 (dated July 22, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Uncontrolled Surface Flow Areas Remedial Design (RD) Work Plan, Draft BPSOU Uncontrolled Surface Flow Areas Pre-Design Investigation (PDI) Work Plan, 2023 Uncontrolled Surface Flow Area Soil Characterization Quality Assurance Project Plan (QAPP) [dated January 25, 2024], Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU), Draft Residential Metals Abatement Program Construction Completion Report (Non‐Residential Parcels – Indoor Dust) –East Middle School (dated March 29, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Request for Change (RFC-RMAP-2024-002) for the Soil Remedial Action at Mandan Park (dated September 19, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Residential Metals Abatement Program (RMAP) Revised 2024 Walkerville Park (Alley of North Main & Alley of West Daly) Soil Remedial Action Work Plan (RAWP) (dated September 18, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Residential Metals Abatement Program (RMAP) Revised Yard Submittals Round 2 (dated August 30, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Insufficiently Reclaimed Sites Belle of Butte (BRES No. 8 & UR-39) Remedial Action Work Plan (RAWP) (dated September 27, 2024), Molly Roby

Comment/Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites Field Sampling Plans (FSPs) for BRES No. 121 – Travona Dump, BRES No. 125 – Child Harold-2 Dump, BRES No. 34E – Eveline Dump East, BRES No. 45 – Garfield, BRES No. 49 – Old Glory, BRES No. 52 – Moscow, BRES No. 74 – West Gagnon Dump, and BRES No. 78 Original Mine (dated May 7, 2024), Molly Roby

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites Belle of Butte (BRES No. 8 & UR-39) Remedial Action Work Plan (RAWP), Molly Roby

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (FSP) for BRES No. 181 – Mountain Con-3 Dump, Molly Roby

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Reclaimed Areas Weed Management Plan (dated April 11, 2024), Molly Roby

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Residential Metals Abatement Program (RMAP) Yard Submittals Round 2 (dated July 25, 2024), Molly Roby

Comments for the 2024 Butte Priority Soils (BPSOU) Residential Metals Abatement Program (RMAP) – Quality Assurance Project Plan (QAPP) for Non-Residential Parcels and Residential Daycares (dated May 23, 2024), Molly Roby

Comments for the Butte Priority Soils (BPSOU) Residential Metals Abatement Program (RMAP) – Interior School Dust – Investigation Summary Report – Gold Hill Lutheran (dated February 5, 2024), Molly Roby

Conditional approval letter for the 2024 Butte Priority Soils (BPSOU) Residential Metals Abatement Program (RMAP) – Quality Assurance Project Plan (QAPP) Annual Update (Non-Residential Parcels and Residential Daycares) (dated July 1, 2024), Molly Roby

Re: Approval for the Response to Comments Letter (dated May 21, 2024) for the Butte Priority Soils Operable Unit (BPSOU) Butte Reclamation Evaluation System (BRES) Draft 2023 BRES Field Evaluation Summary Report and Technical Recommendations Proposal (dated November 15, 2023) and 2023 Corrective Action Plans (CAPs) for Reclaimed Sites (dated January 31, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU), Draft 2024 Residential Metals Abatement Program Investigation Summary Report (Non-Residential – Interior Dust) After the Bell Child Care Center (dated April 25, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Helehan Borrow Material Submittal #2 (dated March 12, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Residential Metals Abatement Program Mandan Park Soil RAWP (dated May 10, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Residential Metals Abatement Program Park Soil Sampling Field Sampling Plan Submittal #13 [Copper Mountain Park] (dated May 10, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Residential Metals Abatement Program Park Soil Sampling Field Sampling Plan Submittal #14 [Silver Bow Homes Park, Butte KOA, Fairmont RV Park, and CCCS Gymnasium] (dated May 10, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2024 Type B Borrow Material Submittal #2 (dated February 14, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Borrow Amendment Submittal #1 (dated May 9, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU), Draft Final Residential Metals Abatement Program Investigation Summary Report (Non-Residential – Interior School Dust) - Gold Hill Lutheran Church (Creativity Factory Preschool) (dated April 8, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Revised Residential Metals Abatement Program (RMAP) Quality Assurance Project Plan (QAPP) (Residential Parcels) (dated June 7, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Unreclaimed Sites Field Sampling Plan (FSP) Package #11: UR-49 and UR-50 (dated May 6, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU), Draft Residential Metals Abatement Program Construction Completion Report (Non-Residential Parcels – Indoor Dust) – Kennedy Elementary (dated April 17, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Residential Metals Abatement Program Construction Completion Report (Non‐Residential Parcels – Indoor Dust) – Silver Bow Montessori (dated April 25, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU), Draft Residential Metals Abatement Program Construction Completion Report (Non-Residential Parcels - Indoor Dust) – Small World Daycare (dated April 17, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Residential Metals Abatement Program (RMAP) – Interior School Dust – Investigation Summary Report (ISR) – Kennedy Elementary School Post-Remedial Action Surface Dust Sampling (dated June 12, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Request for Change (RFC-RMAP-2024-001) (dated May 9, 2024), Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Insufficiently Reclaimed Sites Field Sampling Plans (FSPs) and Response to Agency Comments – BRES No. 34E Eveline Dump East, BRES No. 52 Moscow Dump (dated August 13, 2024) and the BRES No. 78 Original Mine Yard (updated on September 6, 2024), Molly Roby

Re: Approval letter with comments for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (FSP) for BRES No. 181 – Mountain Con-3 Dump (dated October 4, 2024), Molly Roby

Re: Approval of the Butte Priority Soils Operable Unit Residential Metals Abatement Program Yard Submittals (dated April 24, 2024) and Draft RMAP Remedial Action Work Plan (dated May 7, 2024), Molly Roby

Re: Comment Letter for Butte Priority Soils Operable Unit (BPSOU) Residential Metals Abatement Program (RMAP) Individual Site Work Plan (ISWP) Attic Remediation – 3 Pintlar Peaks Dr. (dated October 24, 2024), Molly Roby

Re: Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Butte Hill Revegetation Specifications (dated September 2024), Molly Roby

Re: Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (FSP) for BRES No. 120 – Bonanza Dump (dated July 22, 2024), Molly Roby

Re: Comments for the Butte Priority Soils Operable Unit (BPSOU) Butte Reclamation Evaluation System (BRES) Draft 2023 BRES Field Evaluation Summary Report and Technical Recommendations Proposal (dated November 15, 2023) and 2023 Corrective Action Plans for Reclaimed Sites (dated January 31, 2024), Molly Roby

Re: Comments for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Unreclaimed Sites Quality Assurance Project Plan (QAPP) (dated February 26, 2024), Molly Roby

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) (Non-Residential) - Interior School Dust - Investigation Summary Report–– Emerson Elementary (dated October 13, 2023), Emma Rott

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Fourth Quarter 2022 (dated July 3, 2024), Emma Rott

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System -Third Quarter 2022 (dated November 16, 2023), Emma Rott

Comment Letter for Butte Reduction Works (BRW) Phase II Interim Demolition Plan Construction Drawings and Floodplain Encroachment Analysis (dated September 3, 2024), Emma Rott

Comment Letter for Draft Final BPSOU Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – First Quarter 2024 (dated June 26, 2024), Emma Rott

Comments for the Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – United Congregational (Crayon Factory Preschool) (dated November 16, 2023), Emma Rott

Re: Approval Letter Butte Priority Soils Operable Unit Resubmittal of the Grove Gulch Sedimentation Bay 100% Remedial Design (submitted on July 10, 2024), Emma Rott

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoon System – Fourth Quarter 2023 (dated March 28, 2024), Emma Rott

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Residential Metals Abatement Program (RMAP) Construction Completion Report (Non-Residential Parcels – Indoor Soil) – Butte High School (dated February 12, 2024), Emma Rott