Class 1 Permit Modifications and NMED Responses

Class 1 Permit Modification Notifications, Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO Dated June 29, 2026

• Update Attachment D, Table D-1, Resource Conservation and Recovery Act Emergency Coordinators
• Update Attachment D, Figure D-3, Underground Escape and Evacuation Map
• Update Hoisting Capability Description to include use of Shaft #5 (Utility Shaft) for Underground Emergency Egress if Needed in Permit Attachment D, Permit Attachment E, and Permit Attachment F

Incorporation of Two Class 1 Permit Modification Notifications, Waste Isolation Pilot Plant, EPA I.D. Number: NM4890139088, JohnDavid Nance/NMED, Dated April 07, 2026

• February 18, 2026 – Revised Permit Part 4, Section 4.2.1.5, Legacy TRU Waste Disposal Plan [AR260211]
• March 12, 2026 – Seven Items: 1) Update Manifest Requirements in Permit Attachment A1 and Permit Attachment C; 2) Update Procedure Numbers in Permit Attachment E, Table E-1; 3) Update Location for Emergency Equipment in Permit Attachment D, Table D-2; 4) Remove Location of Obsolete Equipment in Permit Attachment D, Table D-2; 5) Update RCRA Emergency Coordinators in Permit Attachment D, Table D-1; 6) Revise Responsibilities of the Mine Rescue Team in Permit Attachment D; and 7) Add Option for Obtaining Density Measurements in Permit Attachment L. [AR260310]

Class 1 Permit Modification Notification, Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO Dated March 12, 2026

• Update Manifest Requirements in Permit Attachment A1 and Permit Attachment C
• Update Procedure Numbers in Permit Attachment E, Table E-1
• Update Location for Emergency Equipment in Permit Attachment D, Table D-2
• Remove Location of Obsolete Equipment in Permit Attachment D, Table D-2
• Update RCRA Emergency Coordinators in Permit Attachment D, Table D-1
• Revise Responsibilities of the Mine Rescue Team in Permit Attachment D
• Add Option for Obtaining Density Measurements in Permit Attachment L

Class 1 Permit Modification Notification, Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO Dated February 18, 2026

• Revised Permit Part 4, Section 4.2.1.5, Legacy TRU Waste Disposal Plan

Class 1* Permit Modifications and NMED Responses

Class 1* Permit Modification Notification, Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO Dated March 04, 2026

• Revise Anticipated Earliest Closure Dates for Underground Hazardous Waste Disposal Units in Permit Attachment G.

Class 2 Permit Modifications and NMED Responses

Class 2 Permit Modification Request, Waste Isolation Pilot Plant Hazardous Waste Facility Permit Number: NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO Dated April 17, 2026

• Revise Reporting Frequencies and Specify Reporting Periods Associated with the Volatile Organic Compound Data Summary Report
• Revise Reporting Frequencies, Incorporate Groundwater Surface Elevation Report into Annual Culebra Groundwater Report, and Delineate Reporting Periods Associated with the Water Level Monitoring Programs
• Remove the Mine Ventilation Rate Monitoring Report from Permit Part 4 and Permit Attachment A2, Remove Permit Attachment O

Class 3 Permit Modifications and NMED Responses

Notice of Public Hearing and Opportunity for Public Comment on a Draft Hazardous Waste Permit for the Waste Isolation Pilot Plant EPA ID Number: NM4890139088-TSDF

Notice of Administrative Completeness

Temporary Authorization Requests

Request for Determination of Class/NMED Responses

Final Determinations

Technical Incompleteness Determinations

Annual WIPP Waste Minimization Report

Extensions of Time

Approval of Request for 60-Day Extension of Storage Time for CH TRU Mixed Waste in Storage in Waste Handling Building and Parking Area Unit at the Waste Isolation Pilot Plant, Waste Isolation Pilot Plant EPA I.D. Number NM4890139088, JohnDavid Nance/NMED, dated June 17, 2026

Request for a 60-day Extension of the Storage Time for the Waste Containers in Storage in the Waste Handling Building Container Storage Unit and Parking Area Unit at the Waste Isolation Pilot Plant, Hazardous Waste Facility Permit Number NM4890139088-TSDF, Mark Bollinger/CBFO and Ken Harrawood/SIMCO, dated June 16, 2026.

Corrective Action Documents

Notification of Planned Changes

Reporting Anticipated Noncompliances

Written Notice

RCRA Contingency Plan Implementation Reports

Notices of Deficiency

Notices of Violation/Administrative Compliance Orders/Responses

NOTICE OF VIOLATION AND RESOLUTION, U.S. DOE WASTE ISOLATION PILOT PLANT, EPA ID# NM4890139088, Kyle Staggs/NMED, dated May 5, 2026.

Directives from the Secretary

Biennial Report