PUBLIC NOTICE No. 26-06
NEW MEXICO ENVIRONMENT DEPARTMENT
SANTA FE, NEW MEXICO 87505
June 18, 2026
NOTICE OF INTENT TO APPROVE THE REVISED PROPOSED REVISION 36.1 OF THE SITE TREATMENT PLANFEDERAL FACILITY COMPLIANCE ORDER ANNUAL SITE TREATMENT PLAN UPDATE FOR FY 2025 LOS ALAMOS NATIONAL LABORATORY
The State of New Mexico is authorized to operate a hazardous waste management program in lieu of the federal program for most provisions of the Federal Resource Conservation and Recovery Act (RCRA). The Federal Facilities Compliance Act (FCCA) is codified in RCRA §6001. Under the authority of the New Mexico
Hazardous Waste Act, NMSA 1978, Sections 74-4-1 to -14 (1953, as amended through 2018), and the New Mexico Hazardous Waste Management Regulations (20.4.1 NMAC), the New Mexico Environment Department (NMED) may issue a Federal Facility Compliance Order (FFCO) to federal facilities located within New Mexico’s borders.
On October 4, 1995, NMED issued an FFCO to the United States Department of Energy (DOE) and Regents of the University of California (UC) (collectively, the Respondents). Los Alamos National Security, LLC (LANS) replaced UC as a co-operator in 2006. In 2019, Los Alamos Newport Nuclear BWXT-Los Alamos LLC, (N3B) and Triad National Security LLC (Triad) replaced LANS as the co-operators. The FFCO requires compliance with the Site Treatment Plan (STP) Compliance Plan Volume for the treatment and disposal of mixed waste at Los Alamos National Laboratory (LANL). The Respondents must comply with the New
Mexico Hazardous Waste Act, Sections 74-4-1 to -14 and Section 3012(b) of RCRA, 42 U.S.C. §6939(c), as amended by the FFCA of 1992, Public Law 102-386, 106 Stat. 1505 (1992). In accordance with Section X, “Revisions” of the FFCO, all proposed or required revisions shall be made available to the public for review at appropriate locations.
Revisions to the FFCO include, but are not limited to, changes in the covered mixed waste inventories and compliance dates reported in the STP Fiscal Year (FY) Update reports received by NMED since the FFCO was issued on October 4, 1995. On May 28, 2026, the DOE submitted the Site Treatment Plan, Fiscal Year 2025 Annual Update and Proposed Revision 36.1, Federal Facility Compliance Order, October 4, 1995, Los Alamos National Laboratory as refercenced by EM2026-0292 correcting minor typographical edits.
STP Revision 36.1 includes:
1. A description of deleted STP wastes that were shipped offsite for treatment, disposal, or recycling or were otherwise determined to be not mixed waste. These covered wastes are
included in Appendix B, Appendix F, and Appendix G.
2. Addition of newly covered waste, which includes wastes placed in storage during FY2024 and which were proposed to become covered wastes in FY2025. A description of this waste is included in Section 6.1 and is included in Appendix E.
3. Administrative adjustments as a result of an addition of newly identified covered waste and transfer of waste to other treatability groups in FY2025, are included in Appendices A, C, E, and G.
4. Changes to the compliance dates for the milestones to calendar year 2028. A description of these date changes is in Section 5.0.
NMED may approve, approve with modifications, or disapprove the proposed revision. Pending public input, NMED intends to approve the requested revision. The proposed Revision 36.1, this public notice, and the notice of intent to approve the Revised STP Annual Update letter can be reviewed on the NMED website at: https://www.env.nm.gov/hazardous-waste/lanl-ffco-stp/ under the heading “Federal Facility Compliance Order.” To obtain a copy of any of these documents, please contact NMED by calling (505) 476-6000. NMED will accept public comment on the proposed Revision 36.1 for 30 days. Any person who wishes to comment on the proposed Revision 36.1 should submit written comments, along with their name and address, to the NMED Hazardous Waste Bureau, 2905 Rodeo Park Drive, Building 1, Santa Fe, New Mexico,87505-6303 or electronically through the Comment Portal and by email toSiona Briley at mailto:hwb-lanl-mailing@env.nm.gov. Only written comments received by 5:00 p.m. MDT, July 20, 2026, will be considered by NMED in making a final decision.
LANL HAZARDOUS WASTE FACILITY PERMIT MAILING LIST
NMED is required by regulation to maintain a Facility Mailing List as part of its oversight of the (LANL) Waste Facility Permit (Permit). NMED, as well as the DOEuse this list to inform stakeholders, including interested members of the public, of comment periods for permit modification requests and draft permits, and final NMED administrative actions on permit decisions, etc. If you wish to add your name to NMED’s LANL Facility Mailing List, please notify Siona Briley by email at HWB-LANL-Mailing@env.nm.gov, or by postal mail at Siona Briley, New Mexico Environment Department-Hazardous Waste Bureau, 2905 Rodeo Park East, Bldg. 1, Santa Fe, NM 87505. Please include your name, email (preferred communication method to save resources) or postal mailing address, and organization, if any.
ARRANGEMENTS FOR PERSONS WITH DISABILITIES
Any person with a disability requiring assistance or auxiliary aid to participate in this process should contact Kate Cardenas, Non-Discrimination Coordinator, by phone at (505) 827-2855, or via email at: nd.coordinator@env.nm.gov. Toll-free numbers are available for TDD or TDY users to access the New Mexico Relay Network at 1-800-659-1779 (voice); TTY users: 1-800-659-8331.
DISCRIMINATION
NMED does not discriminate on the basis of race, color, national origin, disability, age or sex in the administration of its programs or activities, as required by applicable laws and regulations. NMED is responsible for the coordination of compliance efforts and receipt of inquiries concerning nondiscrimination requirements implemented by 40 C.F.R. Parts 5 and 7, including Title VI of the Civil Rights Act of 1964, as amended; Section 504 of the Rehabilitation Act of 1973; the Age Discrimination Act of 1975, Title IX of the Education Amendments of 1972, and Section 13 of the Federal Water Pollution Control Act Amendments of 1972. If you have any questions about this notice or any of NMED’s non-discrimination programs, policies or procedures, or if you believe that you have been discriminated against with respect to an NMED program or activity, you may contact: Kate Cardenas, Non-Discrimination Coordinator, NMED, 1190 St. Francis Dr., Suite N4050, P.O. Box 5469, Santa Fe, NM 87502, (505) 827-2855, nd.coordinator@env.nm.gov. You may also visit our website at https://www.env.nm.gov/non-employee-discrimination-complaint-page/ to learn how and where to file a complaint of discrimination.
PUBLISHED IN THE LOS ALAMOS DAILY POST THURSDAY JUNE 18, 2026