{"id":43,"date":"2021-06-29T16:03:38","date_gmt":"2021-06-29T16:03:38","guid":{"rendered":"https:\/\/www.env.nm.gov\/hazardous-waste\/snl-mwl-2\/"},"modified":"2025-07-09T17:27:26","modified_gmt":"2025-07-09T17:27:26","slug":"snl-mwl-2","status":"publish","type":"page","link":"https:\/\/www.env.nm.gov\/hazardous-waste\/snl-mwl-2\/","title":{"rendered":"Sandia National Laboratories Mixed Waste Landfill"},"content":{"rendered":"\n

Contents:<\/strong><\/p>\n\n\n\n

Public Notice of Mixed Waste Landfill (MWL) Five-Year Report<\/a>
Corrective Action Complete for the Mixed Waste Landfill<\/a>
Long-Term Monitoring & Maintenance Plan and Long-Term Monitoring & Maintenance Report<\/a>
Corrective Measures Implementation Report<\/a>
Sampling and Analysis Plan for VOCs, Tritium, and Radon<\/a>
Corrective Measure Implementation Plan<\/a>
MWL Subgrade<\/a>
Fate and Transport Model<\/a>
Groundwater and Monitoring Well Documents<\/a>
Corrective Measures Study \u2013 Remedy Selection<\/a>
Appeal Documents on Final Decision<\/a>
Final Decision Documents and Response to Comments<\/a>
Class 3 Permit Modification for Corrective Measures<\/a>
Corrective Measures Study<\/a>
SNL Consolidated Quarterly Reports<\/a>
Annual Long-Term Monitoring and Maintenance Reports<\/a>
SNL Annual Groundwater Monitoring Reports<\/a><\/p>\n\n\n\n

\n\n\n\n

<\/a>Mixed Waste Landfill (MWL)<\/strong><\/p>\n\n\n\n

Mixed Waste Landfill (MWL) Second Five-Year Report<\/strong><\/p>\n\n\n\n

Public Comment Period Extended \u2013 The public comment period for the Sandia National Laboratories\u2019 Second Five-Year Report for the Mixed Waste Landfill has been extended. The public comment period began on June 14, 2024, and was initially to end on August 13, 2024. The public comment period has been extended an additional 30 days and will end on September 10, 2024.<\/p>\n\n\n\n

Public Notice Extended (English) (August 12, 2024)<\/a>
Public Notice Extended (Spanish) (12 de agosto de 2024)<\/a><\/p>\n\n\n\n

NMED issues a public notice for comment on the Sandia National Laboratories\u2019 Mixed Waste Landfill Five-Year Report. The public comment period began on June 14, 2024 and will end on August 13, 2024 at 5:00pm MDT. Below is a link to the Report and the public notices.<\/p>\n\n\n\n

Public Notice (English) (June 14, 2024)<\/a>
Public Notice (Spanish) (14 de junio de 2024)<\/a>\n
Mixed Waste Landfill (MWL) Second Five-Year Report (December 1, 2023)<\/a>
SNL Public Involvement Plan (PIP)<\/a><\/p>\n\n\n\n

The New Mexico Environment Department (NMED) approved the Class 2 Permit Modification Request on July 27, 2023.
Approval Letter<\/a>
Response to Comments<\/a><\/p>\n\n\n\n

NMED received a Class 2 Permit Modification Request<\/a> on March 29, 2023. The modification would be to plug and abandon MWL-MW4 and modify the LTMMP to remove requirements to take groundwater elevation measurements from MWL-MW4.<\/p>\n\n\n\n

Mixed Waste Landfill (MWL) Five-Year Report<\/strong>
NMED approved the MWL Five-Year Report on July 9, 2021.
Approval Letter<\/a>
NMED Response to Comments on the Five-Year Report<\/a><\/p>\n\n\n\n

NMED issued a public notice for comment on the Sandia National Laboratories\u2019 Mixed Waste Landfill Five-Year Report. The public comment period began on May 24, 2019 and ended on July 23, 2019 at 5:00pm MDT. Below is a link to the Report and the public notices.<\/p>\n\n\n\n

Public Notice (English) (May 24, 2019)<\/a>
Public Notice (Spanish) (May 24, 2019)<\/a>
December 14, 2018 \u2013 SNL Submittal of Mixed Waste Landfill (MWL) Five-Year Report<\/a>
Public Involvement Plan for Public Notice of Mixed Waste Landfill Five-Year Report, January 2019<\/a><\/p>\n\n\n\n

<\/a>Corrective Action Complete for the Mixed Waste Landfill<\/strong>\n
Final Decision<\/strong> \u2013 On February 12, 2016, the Environment Department Secretary issued a Final Order on the Corrective Action Complete for the Mixed Waste Landfill. The Final Order, modified permit sections, response to comments and associated documents are provided below.<\/p>\n\n\n\n

Final Order (February 12, 2016)<\/a>\n
Hearing Office Report (October 13, 2015)<\/a>\n
Approval Letter (February 18, 2016)<\/a>\n
Interested Person Letter (February 18, 2016)<\/a>\n
Response to Comments (February 2016)<\/a>\n
Modified Permit\n
    Permit Attachment K \u2013 Solid Waste Management Units and Areas of Concern<\/a>\n
    Permit Attachment M \u2013 Long-Term Monitoring and Maintenance Plan for Solid Waste Management Units and Areas of Concern Granted Corrective Action Complete with Controls<\/a>\n
    Permit Attachment M, Figure 3 \u2013 Solid Waste Management Units \u2013 Corrective Action Complete with Controls, Tech Areas III and V <\/a><\/p>\n\n\n\n

The New Mexico Environment Department held a public hearing on the proposed Corrective Action Complete for the Mixed Waste Landfill from July 8, 2015 through July 11, 2015 in Albuquerque, NM at the Anderson Abruzzo Albuquerque International Balloon Museum in Pugash Hall. See Public Hearing Notice below.<\/p>\n\n\n\n

Public Hearing Notice<\/strong> \u2013 NMED issued a public hearing notice on May 20, 2015 for the proposed Corrective Action Complete for the Mixed Waste Landfill. The public hearing began on July 8, 2015 at 9:00 a.m. at the Anderson Abruzzo Albuquerque International Balloon Museum in Pugash Hall located at 9201 Balloon Museum Drive NE, Albuquerque, NM 87113. The public hearing notices are below:\n
Public Hearing Notice (English) (May 20, 2015)<\/a>\n
Public Hearing Notice (Spanish) (May 20, 2015)<\/a><\/p>\n\n\n\n

Public comment period extended \u2013 NMED issued a public notice on March 17, 2015 extending the public comment period to receive public comment and request for public hearing on the Corrective Action Complete (CAC) proposal for the Mixed Waste Landfill (MWL). The public comment period ended on April 13, 2015.<\/p>\n\n\n\n

The notices extending the public comment period are below:\n
Citizen Letter and Public Notice (English) (March 17, 2015) <\/a>\n
Citizen Letter and Public Notice (Spanish) (March 17, 2015) <\/a>\n
Fact Sheet\/Statement of Basis (January 12, 2015) <\/a><\/p>\n\n\n\n

NMED issued a public notice on January 12, 2015 for public comment and request for public hearing on the Corrective Action Complete (CAC) proposal for the Mixed Waste Landfill. See extended public comment period notices above.\n
Citizen Letter and Public Notice (English) (January 12, 2015)<\/a>\n
Citizen Letter and Public Notice (Spanish) (January 12, 2015)<\/a>\n
Proposed Table K-1, Solid Waste Management Units and Areas of Concern Requiring Corrective Action Under the Consent Order, and Table K-3, Solid Waste Management Units and Areas of Concern, and Hazardous Waste Management Units for which Corrective Action is Complete with Controls<\/a>\n
Proposed Permit Attachment M \u2013 Long-Term Monitoring and Maintenance Plan for Solid Waste Management Units and Areas of Concern Granted Corrective Action Complete with Controls and Proposed Figure 3<\/a>\n
November 2014 \u2013 SNL Revised Notice of a Request for a Class 3 Permit Modification to Module IV of Hazardous Waste Permit for Sandia National Laboratories<\/a>\n
October 17, 2014 \u2013 SNL Request for Class 3 Modification of Module IV of Hazardous Waste Permit for Sandia National Laboratories\/New Mexico<\/a>\n
October 2014 \u2013 SNL Notice of a Request for a Class 3 Permit Modification to Module IV of the Hazardous Waste Permit<\/a><\/p>\n\n\n\n

October 14, 2014 \u2013 SNL Justification for Class 3 Permit Modification, Corrective Action Complete with Controls, Solid Waste Management Unit 76, Mixed Waste Landfill, Volumes 1 through VIII (cover letter<\/a>).
Volumes I through VIII can be viewed at the Lobo Vault by clicking here.<\/a>\n
This document can also be viewed in its entirety by clicking here. Please note that it is approximately 200 MB in size. <\/a><\/p>\n\n\n\n

This document can also be reviewed in its entirety by making arrangements with the New Mexico Environment Department \u2013 Hazardous Waste Bureau<\/p>\n\n\n\n

October 8, 2014 \u2013 NMED Certificate of Completion for the Mixed Waste Landfill<\/a>\n
September 25, 2014 \u2013 SNL Request for Certificate of Completion for the Mixed Waste Landfill <\/a>\n
June 26, 2014 \u2013 NMED Reclamation of Mixed Waste Landfill Borrow Pit<\/a>\n
December 9, 2013 \u2013 SNL Environmental Restoration Operations, Reclamation of the Mixed Waste Landfill Borrow Pit<\/a><\/p>\n\n\n\n

<\/a>MWL Long-Term Monitoring and Maintenance Plan (LTMMP) and Long-Term Monitoring and Maintenance Report<\/strong><\/p>\n\n\n\n

June 25, 2024 – SNL MWL Annual LTMMR, April 2023 – March 2024<\/a>
October 18, 2023 – NMED Approval MWL Annual LTMMR, April 2022-March 2023<\/a>
June 26, 2023 – SNL MWL Annual LTMMR, April 2022-March 2023<\/a>
August 8, 2022 – NMED Approval MWL Annual LTMMR, April 2021-March 2022<\/a>
June 15, 2022 – SNL MWL Annual LTMMR, April 2021-March 2022<\/a>
February 16, 2022 – NMED Approval Class 1 Modification with Prior Approval; Revisions to LTMMP<\/a>
July 23, 2021 – NMED Approval MWL Annual LTMMR, April 2020 – March 2021<\/a>
June 15, 2021 – SNL MWL Annual LTMMR, April 2020 – March 2021<\/a>
July 2, 2020 – NMED Approval MWL Annual LTMMR, April 2019 – March 2020<\/a>
May 27, 2020 – SNL MWL Annual LTMMR, April 2019 – March 2020<\/a>
September 3, 2019 – NMED Approval MWL Annual LTMMR April 2018 \u2013 March 2019, June 2019<\/a>
June 21, 2019 – SNL MWL Annual LTMMR, April 2018-March 2019<\/a>
January 31, 2019 \u2013 NMED Acknowledgement of Receipt Updated Reference Docs Cited in the MWL LTMMP<\/a>
July 13, 2018 \u2013 NMED Approval MWL LTMMR April 2017 – March 2018<\/a>
June 7, 2018 \u2013 SNL MWL Annual LTMMR, April 2017 \u2013 March 2018, June 2018<\/a>
April 6, 2018 \u2013 NMED Approval MWL Annual LTMMR, April 2016 \u2013 March 2017, June 2017<\/a>
February 8, 2018 \u2013 SNL Submittal of Updated Reference Documents Cited in the MWL LTMMP<\/a>
July 21, 2017 \u2013 NMED Acknowledgement of Receipt Submittal of the Mixed Waste Landfill (MWL) Updated Reference Documents Cited in the MWL Long-Term Monitoring and Maintenance Plan<\/a>
July 6, 2017 \u2013 SNL Submittal of Updated Reference Document Cited in the MWL LTMMP<\/a>
June 6, 2017 \u2013 SNL MWL Annual LTMMR, April 2016 \u2013 March 2017<\/a>
November 4, 2016 \u2013 SNL Submittal of the MWL Updated Reference Documents Cited in the MWL LTMMP<\/a>
October 20, 2016 \u2013 NMED Acknowledgement of Receipt Historical Records Disclosure Affirmation: Contents of Solid Waste Management Unit 76, Mixed Waste Landfill, Sandia National Laboratories, May 2016<\/a>
July 20, 2016 \u2013 NMED Approval MWL LTMMP, April 2015 – March 2016<\/a>
June 21, 2016 \u2013 SNL MWL Annual LTMMR, April 2015 \u2013 March 2016<\/a>
May 20, 2016 \u2013 SNL Update Reference Documents Cited in the MWL LTMMP<\/a>
May 16, 2016 \u2013 SNL Historical Records Disclosure Affirmation: Contents of Solid Waste Management Unit 76, Mixed Waste Landfill, Sandia National Laboratories, May 2016<\/a>
March 22, 2016 \u2013 NMED Correction \u2013 Approval MWL Annual LTMMR, April 2014 \u2013 March 2015, June 2015<\/a>
October 16, 2015 \u2013 NMED Approval MWL Annual LTMMR, April 2014 \u2013 March 2015, June 2015<\/a>
June 5, 2015 \u2013 SNL Submittal of MWL LTMMR, April 2014-March 2015<\/a>
May 5, 2015 \u2013 NMED Acknowledgement of Receipt of Reference Documents Cited in the RCRA Operating Permit for Sandia National Laboratories; Updated Reference Document Cited in the Mixed Waste Landfill Long-Term Monitoring and Maintenance Plan<\/a>
February 23, 2015 \u2013 Court of Appeals of New Mexico Opinion on Approval of the LTMMP<\/a>
February 18, 2015 \u2013 SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill (MWL) Long-Term Monitoring and Maintenance Plan (LTMMP)<\/a>
November 14, 2014 \u2013 SNL early release of MWL soil vapor monitoring September 2014 Results <\/a>
September 25, 2014 \u2013 NMED Approval Installation of Three FLUTe Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL-SV05) at the Mixed Waste Landfill<\/a>
September 10, 2014 \u2013 SNL Environmental Restoration Operations Installation of Three FLUTe Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL-SV05) at the Mixed Waste Landfill<\/a>
August 6, 2014 \u2013 NMED Approval Mixed Waste Landfill Annual Long-Term Monitoring & Maintenance Report, January-March 2014, June 2014<\/a>
July 9, 2014 \u2013 SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill Long-Term Monitoring and Maintenance Plan<\/a>
June 18, 2014 \u2013 SNL Submittal of Mixed Waste Landfill Annual Long-Term Monitoring and Maintenance Report, January \u2013 March 2014<\/a>
March 6, 2014 \u2013 SNL Submittal of Reference Documents Cited in the MWL Long-Term Monitoring and Maintenance Plan<\/a>
February 14, 2014 \u2013 NMED Approval of Work Plan for the Installation of Three Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL SV05) at the Mixed Waste Landfill <\/a>
January 15, 2014 \u2013 SNL Work Plan for the Installation of Three Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL SV05) at the Mixed Waste Landfill <\/a>
January 8, 2014 \u2013 The LTMMP was approved by NMED on January 8, 2014 \u2013 Approval Letter<\/a> and Response to Comments<\/a><\/p>\n\n\n\n

February 11, 2013 \u2013 NMED held a public comment period that ended on February 11, 2013. The initial comment period on the LTMMP began on September 14, 2012 and was scheduled to end on November 13, 2012. Requests for extending the comment period were received by the Environment Department and the Secretary granted an extension of an additional 30 days until December 13, 2012. In response to additional requests to extend the comment period, the Secretary granted an additional 60 days until February 11, 2013. The public comment period occurred for 150 days.<\/p>\n\n\n\n

A public dialogue meeting was held on October 16, 2012 at the Cesar Chavez Community Center, 7505 Kathryn SE, Albuquerque, New Mexico 87108. The meeting started at 5:30 p.m. and concluded at 7:45 p.m.<\/p>\n\n\n\n

February 6, 2013 \u2013 NMED Presentation <\/a>at the Albuquerque-Bernalillo County Water Protection Advisory Board public forum on the Sandia National Laboratories\u2019 Mixed Waste Landfill. The meeting was held at the Veteran\u2019s Memorial Museum in Albuquerque from 6:30 p.m. to 8:30 p.m. <\/p>\n\n\n\n

Public Comment Period Extended \u2013 The Secretary extended the public comment period for the March 23, 2012 Long-Term Monitoring and Maintenance Plan. The public comment period began on September 14, 2012 and was initially to end on November 13, 2012. The public comment period was initially extended an additional 30 days and was extended for 60 additional days. The public comment period ended on February 11, 2013.<\/p>\n\n\n\n

Second Extension of Public Comment Period\n
December 18, 2012 \u2013 Interested Citizen Letter and Public Notice of Extension of Public Comment Period \u2013 English version<\/a>\n
December 18, 2012 \u2013 Interested Citizen Letter and Public Notice of Extension of Public Comment Period \u2013 Spanish version<\/a><\/p>\n\n\n\n

First Extension of Public Comment Period\n
November 19, 2012 \u2013 Interested Citizen Letter and Public Notice of Extension of Public Comment Period \u2013 English version<\/a>\n
November 19, 2012 \u2013 Interested Citizen Letter and Public Notice of Extension of Public Comment Period \u2013 Spanish version<\/a><\/p>\n\n\n\n

October 16, 2012 \u2013 Public Dialogue Meeting \u2013 <\/strong>The Environment Department hosted a public dialogue meeting at the Cesar Chavez Community Center, 7505 Kathryn SE, Albuquerque, New Mexico 87108. The meeting started at 5:30 p.m. and concluded at 7:45 p.m. Presentations from the meeting are provided below.\n
NMED Presentation<\/a>\n
SNL Presentation<\/a><\/p>\n\n\n\n

September 14, 2012 \u2013 Interested Person Letter and Public Notice of the Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill<\/a>\n
March 23, 2012 \u2013 SNL Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill<\/a>\n
December 7, 2011 \u2013 SNL withdrawal of 2007 Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill<\/a><\/p>\n\n\n\n

Public Comment Period \u2013 The public comment period for the Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill was extended and ended January 31, 2008. Comments received during the public comment period on the Long-Term Monitoring and Maintenance Plan.
11-26-2007 Citizen Action<\/a>
11-26-2007 Linda Lillow<\/a>
11-27-2007 Lesley Weinstock<\/a>
12-8-2007 Gray Panthers<\/a>
1-31-2008 Citizen Action<\/a>
<\/p>\n\n\n\n

December 17, 2007 \u2013 Extended Public Comment Period
October 31, 2007 \u2013 Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan \u2013 English version<\/a>
October 31, 2007 \u2013 Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan \u2013 Spanish version<\/a><\/p>\n\n\n\n

October 31, 2007 \u2013 Public Comment Period
October 31, 2007 \u2013 Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan \u2013 English version<\/a>
October 31, 2007 \u2013 Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan \u2013 Spanish version<\/a>
September 2007 \u2013 Long-Term Monitoring and Maintenance Plan for the MWL<\/a><\/p>\n\n\n\n

<\/a>MWL Corrective Measures Implementation Report<\/strong>\n
October 14, 2011 \u2013 NMED Notice of Approval Mixed Waste Landfill Corrective Measures Implementation Report, January 2010<\/a>
August 11, 2011 \u2013 SNL Responses to the New Mexico Environment Department Notice of Disapproval: Mixed Waste Landfill Corrective Measures Implementation Report, January 2010 Sandia National Laboratories and Wagner\/Kieling Letter dated May 20, 2011, Subject: Notice of Disapproval: Mixed Waste Landfill Corrective Measures Implementation Report, January 2010 Sandia National Laboratories<\/p>\n\n\n\n

Cover Letter<\/a>
Responses to Notice of Disapproval, August 2011 <\/a>\n
Corrective Measures Implementation Report <\/a>\n
Appendix A, Volume 1<\/a>\n
Appendix A, Volume 2 \u2013 Attachments<\/a>
Corrective Measures Implementation Report (1-26-2010)<\/a>
May 20, 2011 \u2013 NMED Notice of Disapproval Mixed Waste Landfill Corrective Measures Implementation Report, January 2010<\/a>
May 20, 2011 \u2013 NMED Letter to Commenters on the MWL CMI Report<\/a>
May 20, 2011 \u2013 NMED Response to Comments regarding the MWL CMI Report<\/a>
Comments received during the public comment period on the MWL CMI Report<\/a><\/p>\n\n\n\n

The public comment period on the Mixed Waste Landfill (MWL) Corrective Measures Implementation (CMI) Report was extended for an additional 30 days. The comment period ended on February 28, 2011.
<\/strong>January 28, 2011 \u2013 Public Notice extending the comment period of the MWL CMI Report<\/a><\/p>\n\n\n\n

The Environment Department held a public meeting on the CMI Report on December 14, 2010 from 6:00 p.m. to 8:00 p.m. at the Cesar Chavez Community Center, 7505 Kathryn SE, in Albuquerque.
December 14, 2010 \u2013 NMED Presentation on the MWL Corrective Measures Implementation Report at Cesar Chavez Community Center (491 KB) <\/a>
November 29, 2010 \u2013 Public Notice of Comment Period for the MWL Corrective Measures Implementation (CMI) Report<\/a><\/p>\n\n\n\n

<\/a>MWL Sampling and Analysis Plan for VOCs, Tritium, and Radon at MWL
<\/strong>September 26, 2008 \u2013 NMED Approval of the Investigation Report on the Soil-Vapor Volatile Organic Compounds, Tritium, and Radon Sampling at the MWL<\/a>\n
August 2008 \u2013 Investigation Report on the Soil-Vapor Volatile Organic Compounds, Tritium, and Radon Sampling at the MWL<\/a>
July 25, 2008 \u2013 NMED Time Extension to Submit Soil-Vapor Investigation Report<\/a>\n
July 10, 2008 \u2013 SNL Request for Time Extension to Submit Soil-Vapor Investigation Report<\/a>
\nFebruary 15, 2008 \u2013 Interested Person Letter<\/a>
Response to Comments<\/a>\n
February 14, 2008 \u2013 Approval with Modifications Letter<\/a>\n
Comments received on the Mixed Waste Landfill Sampling and Analysis Plan. The following are comments received by the close of the comment period on May 15, 2007.\n
Southwest Research and Information Center (5-15-2007)<\/a>\n
Citizen Action (Including Attachments) (5-15-2007)<\/a>
R. Gilkeson (5-15-2007)<\/a>\n
Citizen Action (5-1-2007)<\/a>
Citizen Action (4-27-2007)<\/a>
Jeanne House (3-5-2007)<\/a>\n
Southwest Research and Information Center (3-1-2007)<\/a>\n
Citizen Action (2-28-2007)<\/a>\n
D. Lennihan (2-13-2007)<\/a><\/p>\n\n\n\n

April 13, 2007 \u2013 Interested Citizen Letter and Meeting Notice on the Sampling and Analysis Plan \u2013 English and Spanish<\/a>\n
February 5, 2007 \u2013 Interested Citizen Letter and Public Notice on the Sampling and Analysis Plan \u2013 English and Spanish <\/a> \n
December 2006 \u2013 Sampling and Analysis Plan for VOCs, Tritium, and Radon at MWL<\/a><\/p>\n\n\n\n

<\/a>MWL Corrective Measure Implementation Plan
<\/strong>March 23, 2011 \u2013 SNL Request for Approval to Implement Supplemental Watering Activities for the Mixed Waste Landfill (MWL) Evapotranspirative (ET) Cover<\/a>
April 8, 2010 \u2013 SNL MWL Quarterly Progress Report<\/a>
December 21, 2009 \u2013 MWL Quarterly Progress Report, Evapotranspirative Cover Construction Project, August \u2013 October 2009<\/a>
November 18, 2009 \u2013 NMED Quarterly Progress Report Evapotranspirative Cover Construction Project, May \u2013 July 2009 <\/a>
September 30, 2009 \u2013 Quarterly Progress Report \u2013 Evapotranspirative (ET) Cover Construction Project, May \u2013 July 2009<\/a>
April 10, 2009 \u2013 Execution of MWL CMI Plan<\/a>
February 12, 2009 \u2013 Replacement Pages for the MWL CMI Plan, November 2005<\/a>
December 22, 2008 \u2013 Conditional Approval of the MWL CMI Plan
<\/a>November 26, 2008 \u2013 SNL Response to NOD on the MWL CMI Plan<\/a>
October 10, 2008 \u2013 Notice of Disapproval on the MWL CMI Plan<\/a>
November 21, 2006 \u2013 Interested Citizen Letter and Response to Comments<\/a>
Public Comments Received on CMI Plan<\/a>
May 25, 2006 \u2013 14-Day Interested Citizen Letter and Public Notice<\/a>
Public Dialogue Agenda for the May 25, 2006 meeting on the CMI Plan<\/a>\n
May 4, 2006 \u2013 Interested Citizen Letter and Notice of Public Dialogue on the CMI Plan \u2013 English and Spanish<\/a>\n
April 24, 2006 \u2013 SNL Response to Public Comment<\/a>
December 9, 2005 \u2013 Interested Citizen Letter and Public Notice<\/a>
<\/p>\n\n\n\n

January 19, 2007 \u2013 SNL Response to Comments (Part 2) on the CMI Plan<\/a>
Attachment 1 \u2013 Supporting Documentation and Supplemental Information Regarding the Fate and Transport Model (CD)<\/a>
Appendix A \u2013 SANDIA REPORT, SAND2007-0170, Probabilistic Performance-Assessment Modeling of the Mixed Waste Landfill at Sandia National Laboratories (2nd Edition) (1-2007)<\/a>

December 15, 2006 \u2013 SNL Response to Comments (Part 1) on the CMI Plan<\/a>
November 20, 2006 \u2013 Notice of Disapproval Letter to SNL<\/a>
November 2005 \u2013 Corrective Measures Implementation Plan<\/a><\/p>\n\n\n\n

<\/a>MWL Subgrade
<\/strong>March 23, 2007 \u2013 NMED Response Letter on subgrade measures<\/a>
March 13, 2007 \u2013 SNL Letter requesting precautionary measures to the subgrade<\/a>
September 18, 2006 \u2013 Fence Removal and Subgrade Preparation<\/a>
July 12, 2006 \u2013 SNL Letter on MWL Fence Removal and Preparation<\/a>
June 10, 2010 \u2013 EPA response to Senator Bingaman on review of Evaluation of the Representativeness and Reliability of Groundwater Monitoring Well Data, Mixed Waste Landfill<\/a>
November 2006 \u2013 Evaluation of the Representativeness and Reliability of Groundwater Monitoring Well Data, Mixed Waste Landfill<\/a><\/p>\n\n\n\n

<\/a>MWL Fate and Transport Model
<\/strong>November 2005 \u2013 Fate and Transport (Probabilistic Performance \u2013 Assessment Modeling of the MWL<\/a>
References
Supplemental Information on Models and Software Used for Fate and Transport Modeling of the Mixed Waste Landfill. <\/a>Citations referenced within this document can be found by clicking here.<\/a>
February 2005 \u2013 Calculation Set for Design and Optimization of Vegetative Soil Covers, Sandia National Laboratories, Albuquerque, New Mexico<\/a>
January 2007 \u2013 Probabilistic Performance-Assessment Modeling of the Mixed Waste   Landfill at Sandia National Laboratories (2nd Edition)<\/a>
EPA Assessment of Risks from Radon in Homes<\/a>
1997 Radon Flux Testing Results at the MWL (Hans Oldewage)<\/a><\/p>\n\n\n\n

<\/a>MWL Groundwater and Monitoring Well Documents
<\/strong>Also see Consolidated Quarterly Reports<\/strong><\/a> and the Annual Groundwater Monitoring Reports<\/strong><\/a> for additional information.
June 28, 2016 \u2013 SNL Calendar Year 2015 Annual Groundwater Monitoring Report <\/a>
March 10, 2015 \u2013 NMED Approval Mixed Waste Landfill Groundwater Monitoring Report, Monitoring Well MWL-MW4 Metals Data, September 2014 Pumping and Sampling , January 2015<\/a>
February 18, 2015 \u2013 SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill (MWL) Long-Term Monitoring and Maintenance Plan (LTMMP)<\/a>
February 18-2015 \u2013 SNL Mixed Waste Landfill Groundwater Monitoring Report \u2013 Monitoring Well MWL-MW4 Metals Data \u2013 September 2014 Pumping and Sampling, January 2015<\/a>
October 8, 2014 \u2013 NMED \u2013 Draft Groundwater Monitoring at Sandia National Laboratories Mixed Waste Landfill: MWL-MW4 Metals Study Conducted by the NMED DOE Oversight Bureau<\/a>
July 24, 2014 \u2013 NMED Mixed Waste Landfill Groundwater Monitoring Report \u2013 Groundwater Monitoring Well MWL-MW4 \u2013 Calendar Year 2013<\/a>
May 20, 2014 \u2013 SNL Environmental Restoration Operations Mixed Waste Landfill Groundwater Monitoring Report -Monitoring Well MWL-MW4 Metals Data<\/a>
March 23, 2011 \u2013 SNL Request for Approval to Implement Supplemental Watering Activities for the Mixed Waste Landfill (MWL) Evapotranspirative (ET) Cover<\/a>
September 30, 2011 \u2013 Mixed Waste Landfill Groundwater Monitoring Report Calendar Year<\/a>
January 13, 2011 \u2013 Notice of Approval MWL Toluene Investigation Report, Revised October 2010<\/a>
October 20, 2010 \u2013 Response to September 28, 2010, NMED comments on the MWL Toluene Investigation Report <\/a>
August 23, 2010 \u2013 SNL MWL Toluene Investigation Report August 2010<\/a>
July 14, 2010 \u2013 Groundwater Monitoring at Sandia National Laboratories\/New Mexico Mixed Waste Landfill Conducted by NMED\/DOE OB for FFY 2010 Q-2<\/a>
June 7, 2010 \u2013 MWL Groundwater Monitoring Report Calendar Year 2009<\/a>
June 7, 2010 \u2013 NMED Notice of Approval: Responses to Notice of Disapproval Issued for Mixed Waste Landfill Groundwater Monitoring Report, Calendar Year 2008, May 2009<\/a>
June 4, 2010 \u2013 NMED Approval of Extension Request for Toluene Investigation Report, Mixed Waste Landfill<\/a>
May 21, 2010 \u2013 SNL Extension Request for the Toluene Investigation Report Required for the MWL<\/a>
April 30, 2010 \u2013 Toluene Detections in Groundwater Sandia National Laboratories Mixed Waste Landfill<\/a>
February 22, 2010 \u2013 Groundwater Monitoring at Sandia National Laboratories\/New Mexico Mixed Waste Landfill Conducted by NMED\/DOE OB for FFY 2009 Q-4<\/a>
December 23, 2009 \u2013 SNL Responses to NMED\u2019s Notice of Disapproval: MWL Groundwater Monitoring Report, Calendar Year 2008
<\/a>October 29, 2009 \u2013 Notice of Disapproval: MWL Annual Groundwater Monitoring Report for Calendar Year 2008<\/a>
June 18, 2009 \u2013 NMED Groundwater Split Sampling of SNL Wells MWL-BW2, MWL-MW7, MWL-MW8, MWL-MW9 and CTF-MW2<\/a>
May 27, 2009 \u2013 SNL MWL Annual Groundwater Monitoring Report for Calendar Year 2008<\/a>
January 15, 2009 \u2013 NMED Notice of Approval: Summary Report for Mixed Waste Landfill Monitoring Well Plug and Abandonment and Installation \u2014 Decommissioning of Groundwater Monitoring Wells MWL-MW1, MWL-MW2, and MWL-MW3 Installation of Groundwater Monitoring Wells MWL-MW7, MWL-MW8, and MWL-MW9, September 2008<\/a>
October 31, 2008 \u2013 NMED Approval of the Summary Report for MWL Monitoring Well Plug and Abandonment and Installation \u2013 Decommissioning of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2<\/a>
October 3, 2008 \u2013 SNL Response to the 8-25-2008 Notice of Disapproval on the Summary Report for MWL Monitoring Well Plug and Abandonment and Installation \u2013 Decommissioning of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2<\/a>
September 2008 \u2013 Summary Report for Mixed Waste Landfill Monitoring Well Plug and Abandonment and Installation: Decommissioning of Groundwater Monitoring Wells MWL-MW1, MWL-MW2, and MWL-MW3 and Installation of Groundwater Monitoring Wells MWL-MW7, MWL-MW8, and MWL-MW9<\/a>
August 25, 2008 \u2013 NMED Notice of Disapproval: Summary Report for MWL Monitoring Well Plug and Abandonment and Installation \u2013 Decommissioning
of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2<\/a>
April 23, 2008 \u2013 Summary Report for Mixed Waste Landfill Monitoring Well Plug and Abandonment and Installation: Decommissioning of Groundwater Monitoring Well MWL-BW1 and Installation of Groundwater Monitoring Well MWL-BW2
<\/a>March 6, 2008 \u2013 SNL Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan; Decommissioning of Groundwater Monitoring Well MWL-MW2; Installation of Replacement Monitoring Well MWL-MW9<\/a>
February 21, 2008 \u2013 SNL MWL Annual Groundwater Monitoring Report Spring 2007 Sampling Event<\/a>
February 12, 2008 \u2013 NMED Letter on the Location of Monitoring Wells MWL-MW7 and MW8<\/a>
December 5, 2007 \u2013 SNL Response to NMED\u2019s 10-30-2007 Notice of Approval<\/a>
October 30, 2007 \u2013 NMED Notice of Approval Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan; Decommissioning of Groundwater Monitoring Wells MWL-MW1 and MWL-MW3; Installation of Replacement Groundwater Monitoring Wells MWL-MW7 and MWL-MW8<\/a>
October 26, 2006 \u2013 NMED Notice of Approval Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan TAV-MW1 and TAV-MW10 <\/a>
October 12, 2007 \u2013 NMED Correction-Notice of Approval Monitoring Well Plug and Abandonment Plan MWL-BW1 Replacement Well MWL-BW2<\/a>
October 10, 2007 \u2013 NMED Notice of Approval Monitoring Well Plug and Abandonment Plan MWL-BW1 Replacement Well MWL-BW2<\/a>
August 10, 2007 \u2013 SNL Response Monitoring Well Plug and Abandonment Plan and Replacement Well Construction TAV-MW1 and TAV-MW10<\/a>
August 10, 2007 \u2013 SNL Monitoring Well Plug and Abandonment Plan and Replacement Well Construction MWL-MW1, MWL-MW3, MWL-MW7 and MWL-MW8<\/a>
August 3, 2007 \u2013 SNL Response Monitoring Well Monitoring Well Plug and Abandonment Plan and Replacement Well Construction MWL-BW1 and MWL-BW2, Revision 1<\/a>
July 2, 2007 \u2013 NMED Require SNL to Replacement MWL Wells MW1 and MW3<\/a>
June 26, 2007 \u2013 NMED Notice of Disapproval on the Monitoring Well Plug and Abandonment Plan and Replacement Well Construction for TAV-MW1 and TAV-MW10<\/a>
June 19, 2007 \u2013 NMED Notice of Disapproval on the Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan for BW-1 and BW-2<\/a>
April 17, 2007 \u2013 SNL Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan for BW-1 and_BW-2 <\/a>
March 23, 2007 \u2013 NMED Letter on MWL-BW1 Monitoring Well Replacement<\/a>
December 13, 2006 \u2013 SNL MWL Annual Groundwater Monitoring Report April 2006<\/a>
February 6, 2004 \u2013 Compilation of Monitoring Well Construction Diagrams Contained in SNL\/ER Project Well Database<\/a>
September 24, 1994 \u2013 Review of Ground-Water Monitoring at Sandia National Laboratories\u2019 Mixed Waste Landfill<\/p>\n\n\n\n

<\/a>MWL Corrective Measures Study \u2013 Remedy Selection
<\/a>MWL Appeal Documents on Final Decision<\/strong>
Supreme Court
New Mexico Supreme Court Writ of Certiorari Denied (Filed 2-26-2008)<\/a>
NMED Response to Petition for Writ of Certiorari (Filed 2-15-2008)<\/a>
SNL Response to Petition for Writ of Certiorari (Filed 2-15-2008)<\/a>
Petition for Writ of Certiorari (Filed 1-29-2008)<\/a><\/p>\n\n\n\n

Court of Appeals
Court of Appeals Opinion on Citizen Action Appeal (Filed 12-19-2007)<\/a>
Appelant\u2019s Reply Brief (Filed 2-23-2007)<\/a>
Appellant\u2019s Brief-in-Chief (Filed 10-10-2006)<\/a>
<\/p>\n\n\n\n

<\/a>MWL Final Decision Documents and Response to Comments
<\/strong>Response to Comments (08-02-2005)<\/a>
Interested Citizen Letter-Final Decision (08-02-2005)<\/a>
Permit Language for the Mixed Waste Landfill<\/a>
Hearing Officer\u2019s Proposed Findings of Fact and Conclusion of Law (05-20-2005)<\/a>
Hearing Officer\u2019s Substitute Pages for Interlineations in Report (05-24-2005)<\/a>
Hearing Officer\u2019s Report \u2013 Findings of Fact and Conclusion of Law (05-20-2005)<\/a>
Final Order (05-26-2005)<\/a><\/p>\n\n\n\n

<\/a>MWL Class 3 Permit Modification for Corrective Measures (August 11, 2004)
<\/strong>Interested Citizen Letter \u2013 English version<\/a>
Interested Citizen Letter \u2013 Spanish version<\/a>
Public Notice \/ Hearing Notice- English version<\/a>
Public Notice \/ Hearing Notice- Spanish version<\/a>
Fact Sheet<\/a>
Draft Permit<\/a>
Administrative Record Index<\/a><\/p>\n\n\n\n

<\/a>MWL Corrective Measures Study
<\/strong>Permit Modification Request (01\/23\/2004)<\/a>
CMS Report deemed Complete (01\/05\/2004)<\/a>
SNL Response to CMS Report NOD (12\/19\/2003)<\/a>
Notice of Deficiency (NOD; 11\/05\/2003)<\/a>
CMS Report
<\/a>CMS Figures<\/a>
CMS Tables<\/a>
Appendix A (Description of Preferred Technologies)<\/a>
Appendix B (Cost Summary Reports)<\/a>
Appendix C (Cost Detail Reports)<\/a>
Appendix D (Cost Overtime Reports)<\/a>
Appendix E (Cost Worksheet)<\/a>
Appendix F (Additional Cost Details)<\/a>
Appendix G (Technical Approach & Cost Estimate)
Appendix H (Evaluation of Near Term Excavation)<\/a>
Appendix I (Risk Assessment)<\/a>
NMED Letter Requiring Corrective Measures Study for the Mixed Waste Landfill (10-11-2001)<\/a><\/p>\n\n\n\n

SNL Consolidated Quarterly Reports<\/strong><\/a><\/p>\n\n\n\n

Annual Long-Term Monitoring and Maintenance Reports<\/strong><\/a><\/p>\n\n\n\n

SNL Annual Groundwater Monitoring Reports<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Contents: Public Notice of Mixed Waste Landfill (MWL) Five-Year Report Corrective Action Complete for the Mixed Waste Landfill Long-Term Monitoring & Maintenance Plan and Long-Term Monitoring & Maintenance Report Corrective Measures Implementation Report Sampling and Analysis Plan for VOCs, Tritium, and Radon Corrective Measure Implementation Plan MWL Subgrade Fate and Transport Model Groundwater and Monitoring […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-43","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/pages\/43","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/comments?post=43"}],"version-history":[{"count":28,"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/pages\/43\/revisions"}],"predecessor-version":[{"id":852,"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/pages\/43\/revisions\/852"}],"wp:attachment":[{"href":"https:\/\/www.env.nm.gov\/hazardous-waste\/wp-json\/wp\/v2\/media?parent=43"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}