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Silver Bow Creek/Butte Area Superfund Site

Submissions from 2022 2022

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Revision No. 2, Residential Metals Abatement Program (RMAP), Quality Assurance Project Plan (QAPP), Non-Residential Parcels – Indoor Dust (dated October 3, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Annual Quality Assurance Project Plan for Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site; Phase I BRW Quality Assurance Project Plan (dated July 20, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Annual Quality Assurance Project Plan for Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site; Phase II BRW Quality Assurance Project Plan (dated July 8, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Annual Quality Assurance Project Plan for Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site; Phase III BRW Quality Assurance Project Plan (dated November 29, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Blacktail Creek Pumping Test Quality Assurance Project Plan (QAPP) (dated July 5, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) Butte High School – Indoor Soil (dated March 25, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 3 – Butte High School/Annex (dated April 25, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 4 – Monroe Head Start, Former Hawthorne School, Margaret Leary Elementary, and Ramsey Elementary (dated April 26, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final 2022 Street & Snow Management Plan (dated July 29, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 133 – Dexter Mill (dated July 14, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 158 – Waste Rock Dump (dated June 20, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 16 – Curry (dated January 12, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 30 – Atlantic-1 (dated January 12, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 32 – Corra-2 Dumps (dated June 20, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 34 – Eveline (dated July 22, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 37 – Josephine Shaft (dated July 20, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 38 – Sister Dump (dated June 16, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 50 – Zelia (dated June 22, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 93 – Soudan Dump (dated June 23, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling Plan (FSP) BRES No. 96 – Washoe Dump (dated June 23, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #1 [Covering Walkerville Ball Park, Antimony Ball Field, Walkerville Park (Walkerville Drive & Ryan Road), Walkerville Park (5th & Transit), and Walkerville Park (Alley of North Main & Alley of West Daly)] (dated June 14, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #2 [Covering Scown Field, Cherokee Park, Copper/Emmet, West Side Subdivision Park, Chester Steele Park, and Cinders Field] (dated June 14, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #3 [Covering Koprivica Park, McGruff Park, Skate Park, Belmont Park, Rock Park, and Hanna Park] (dated June 14, 2022)., Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #4 [Covering Tot Lot, Clark Park, Huron Tennis Courts, Father Sheehan Park, Community Garden, and Lexington Gardens] (dated June 14, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #5 [Covering Longfellow Ball Fields, Peace Park, Rocker Park, Racetrack Park, C Street, JFK Park, and Rickey Park] (dated June 14, 2022)., Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP) Park Soil Sampling Field Sampling Plan (FSP) Submittal #6 [Covering Stodden Park, Baptist Student Union (former McKinley School), Minor Park, Blacktail Lane, Earth Lane, Fleecer Drive, Boulevard (Josette), Boulevard (Lasalle), and Sesame-Sage (Golden Estates #3) (dated June 14, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Residential Metals Abatement Program (RMAP), Quality Assurance Project Plan (QAPP), Non-Residential Parcels – Indoor Dust (dated February 28, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Solid Media Management Program Plan (dated August 1, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 1 (Aware Early Head Start, Lincoln Head Start, Highland View Christian School, Silver Bow Montessori, and Small World Day Care) (dated March 23, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Insufficiently Reclaimed Sites Colorado Dump – West Lot Remedial Action Work Plan (RAWP) (dated July 29, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Insufficiently Reclaimed Sites – Field Sampling Plan (FSP) BRES No. 8 – Belle of Butte (dated August 2, 2022), Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final Reclaimed Areas Maintenance and Monitoring Plan (dated June 15, 2022), Nikia Greene

Approval letter for the Draft Final Residential Metals Abatement Program (RMAP) Cherokee Park Soil Remedial Action Work Plan (RAWP) (dated November 4, 2022), Nikia Greene

Approval letter for the Draft Final Residential Metals Abatement Program (RMAP) Koprivica Park Soil Remedial Action Work Plan (RAWP) (dated November 4, 2022), Nikia Greene

Approval letter for the Request for Change (RFC) to the Butte Priority Soils Operable Unit (BPSOU) Request for Change (RFC) No. 1 to the Final 2022 Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP) (dated August 31, 2022), Nikia Greene

Approval letter for the Request for Information (RFI) - 01 to the Butte Priority Soils Operable Unit (BPSOU) Final 2022 Unreclaimed Sites Quality Assurance Project Plan (QAPP) (dated August 31, 2022), Nikia Greene

Approval Letter for the Revised Draft Final Butte Priority Soils Operable Unit (BPSOU) Revised Butte Reclamation Evaluation System (BRES) Field Manual (dated July 2021), Nikia Greene

Approval letter for the Revised Residential Metals Abatement Program (RMAP), Interior School Soils Remedial Action Work Plan (RAWP), Butte High School (dated November 17, 2022), Nikia Greene

Approval of Quality Assurance Project Plan [QAPP], 2022, Butte Mine Flooding Operable Unit and Butte Priority Soils Operable Unit, Private Well Monitoring Program, dated November 2021, revised version received February 10, 2022, Nikia Greene

Approval of the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final 2021 Groundwater Monitoring Data Summary Report, January 2021 – December 2021 (dated July 20, 2022), Nikia Greene

Approval of the Final Butte Priority Soils Operable Unit (BPSOU), Revised Draft Final Interim 2022 Site-Wide Surface Water Quality Assurance Project Plan (QAPP) (dated January 28, 2022), Nikia Greene

Approval of the Final Butte Priority Soils Operable Unit (BPSOU), Revision 1 to the Final 2022 Site-Wide Surface Water Quality Assurance Project Plan (QAPP) (dated February 25, 2022), Nikia Greene

Approval on the Draft Butte Priority Soils Operable Unit (BPSOU) Blacktail Creek Piezometer Installation and Monitoring Well Repair Plan (dated June 10, 2022), Nikia Greene

Comment letter: BPSOU Draft Final RMAP Quality Assurance Project Plan (QAPP) (Residential RMAP Parcels) (dated January 10, 2022), Nikia Greene

Comment letter: Butte Priority Soils Operable Unit (BPSOU) Draft Final Unreclaimed Sites Quality Assurance Project Plan (dated April 5, 2022), Nikia Greene

Comment letter for: 2021 BRES (Butte Reclamation Evaluation System) Inspection and Technical Recommendations Report (dated January 24, 2022), Nikia Greene

Comment Letter for: BPSOU Draft 2021 Stormwater Evaluation and Maintenance Report, (dated July 14, 2022), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final 2021 BPSOU Subdrain Data Summary Report (dated May 4, 2022), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final Blacktail Creek Remediation and Contaminated Groundwater Hydraulic Control Site, Pumping Test Quality Assurance Project Plan (dated October 20, 2021), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoons System – Fourth Quarter 2021 (dated March 30, 2022), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoons System – Fourth Quarter 2021 (dated March 30, 2022), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoons System – Second Quarter 2021 (dated September 21, 2021), Nikia Greene

Comment letter for: Butte Priority Soils Operable Unit (BPSOU) Draft Final Quarterly Operations and Maintenance Report Butte Treatment Lagoons System – Third Quarter 2021 (dated December 10, 2021), Nikia Greene

Comment Letter for Draft 2021 Stormwater BMPs Repair, Inspection Report, and Maintenance Work Plan (dated January 24, 2022), Nikia Greene

Comment Letter for Draft Blacktail Creek (BTC) Groundwater Hydraulic Control System Remedial Design Work Plan (RDWP) (dated July 22, 2022), Nikia Greene

Comment Letter for Draft Final BPSOU Subdrain Pump Station Quality Assurance Project Plan (dated October 7, 2022), Nikia Greene

Comment Letter for Draft Final BPSOU Subdrain Pump Station Remedial Design (RD) Work Plan (dated June 14, 2022), Nikia Greene

Comment letter for: Quality Assurance Project Plan: Long-Term Operation and Maintenance of Railroad Assets, For BNSF Railway Company and Union Pacific Railroad, Butte Priority Soils Operable Unit (dated May 2022), Nikia Greene

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Draft Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP) (dated May 20, 2022), Nikia Greene

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites Colorado Dump – West Lot Remedial Action Work Plan (RAWP) (dated July 13, 2022), Nikia Greene

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Further Remedial Element Projects Quality Assurance Project Plan (QAPP) (dated October 2021), Nikia Greene

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Residential Metals Abatement Program (RMAP), Interior School Soils – Remedial Action Work Plan (RAWP), Butte High School (dated October 5, 2022), Nikia Greene

Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Final Multi-Pathway Residential Metals Abatement Program Plan (dated November 19, 2021), Nikia Greene

Comment letter for the Draft Final 2021 Unreclaimed Site Investigation: XRF to Laboratory Correlation and Regression Analyses Procedure (dated May 16, 2022), Nikia Greene

Comments for the Butte Priority Soils Operable Unit, 2018 Unreclaimed Sites Sampling UR- 09 Site Evaluation Summary Report (February 18, 2022), Nikia Greene

Comments for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Insufficiently Reclaimed Sites - Field Sampling and Investigation Plan (FSP) BRES No. 08 – Belle of Butte (dated March 11, 2022), Nikia Greene

Comments for the Butte Priority Soils Operable Unit, Insufficiently Reclaimed Site – Clark Mill Tailings NE (BRES No. 154) Evaluation Summary Report (May 4, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-03 Site Evaluation Summary Report (August 3, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-24 Site Evaluation Summary Report (July 26, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-33 Site Evaluation Summary Report (June 6, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-35 Site Evaluation Summary Report (June 15, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-36 Site Evaluation Summary Report (August 8, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-38 Site Evaluation Summary Report (June 8, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-39 Site Evaluation Summary Report (June 15, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, Draft Final 2021 Unreclaimed Sites Sampling – Minnie Irvine (UR-01) Site Evaluation Summary Report (May 24, 2022), Nikia Greene

Comments for the Draft Final Butte Priority Soils Operable Unit, Draft Final 2021 Unreclaimed Sites Sampling Ruby Street (UR-05) Site Evaluation Summary Report (May 2022), Nikia Greene

Comments for the Draft Final Residential Metals Abatement Program (RMAP) (Non- Residential Parcels) Data Summary Report (DSR) (dated April 19, 2022), Nikia Greene

Comments for the Draft Residential Metals Abatement Program (RMAP) (Non- Residential Parcels) Quality Assurance Project Plan (QAPP) (dated May 12, 2022), Nikia Greene

Comments on Berkeley Pit and Discharge Pilot Project, Quarterly Pilot Project Report, Second Quarter 2022, dated September 21, 2022, Nikia Greene

Comments on the Butte Priority Soils Operable Unit (BPSOU) Annual Quality Assurance Project Plan for Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site; Phase III BRW Quality Assurance Project Plan (dated June 29, 2022), Nikia Greene

Comments on the Butte Priority Soils Operable Unit (BPSOU) Draft Final Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site Pre-Design Investigation (PDI) Evaluation Report (dated June 10, 2022), Nikia Greene

Comments on the Butte Priority Soils Operable Unit (BPSOU) Revised Retention and Detention Discharge Management Report (dated April 1, 2022), Nikia Greene

Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) 2020 Groundwater Compliance and Interpretation Technical Memorandum (dated May 12, 2022), Nikia Greene

Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) 2021 Draft Site- Wide Surface Water Monitoring Data Summary Report (dated April 4, 2022), Nikia Greene

Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) 2021 Groundwater Monitoring Data Summary Report, January 2021 – December 2021 (dated April 8, 2022), Nikia Greene

Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) Draft Surface Water Surface Water Compliance and Interpretation Technical Memorandum (dated May 12, 2022), Nikia Greene

Comments the Butte Reclamation Evaluation System (BRES) Draft 2021 Field Evaluation of Reclaimed Sites Summary Report, 2021 BRES Field Evaluation Summary Report and Technical Recommendations Proposal (dated March 11, 2022), Nikia Greene

Concurrence and Comments on: SD Response to the Agencies Proposed RAAR Path Forward letter, dated March 28, 2022 and Pilot Project Annual Update letter, dated July 1, 2022, Nikia Greene

EPA REGION 8 QA DOCUMENT REVIEW CROSSWALK, Nikia Greene

Final Revised Butte Reduction Works (BRW) Phase III QAPP, Nikia Greene

Final Revised Butte Reduction Works (BRW) Phase III QAPP, Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 3, Revision 1 (dated September 8, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 4, Revision 1 (dated September 8, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 5, Revision 1 (dated September 8, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 6, Revision 1 (dated September 8, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Revision No. 1, Residential Metals Abatement Program (RMAP), Quality Assurance Project Plan (QAPP), Non-Residential Parcels – Indoor Dust (dated September 9, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2022 Residential Metals Abatement Program (RMAP) Field Sampling Plan (FSP) – Indoor Dust – Group 2 – West Elementary (dated April 25, 2022), Nikia Greene

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Final 2022 Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP) (dated July 12, 2022), Nikia Greene

RE: Butte High School Indoor Soil FSP - Informal Agency Review Copy, Nikia Greene

BPSOU Draft Final Residential Metals Abatement Program (RMAP) QAPP (Non-Residential Parcels) (5/12/22), Nikia Greene, Butte Silver Bow, and Atlantic Richfield Company