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 Well Documents
Corrective Measures Study – Remedy Selection
Appeal Documents on Final Decision
Final Decision Documents and Response to Comments
Class 3 Permit Modification for Corrective Measures
Corrective Measures Study
SNL Consolidated Quarterly Reports
Annual Long-Term Monitoring and Maintenance Reports
SNL Annual Groundwater Monitoring Reports
Mixed Waste Landfill (MWL) Second Five-Year Report
Mixed Waste Landfill (MWL) Second Five-Year Report (December 1, 2023)
The New Mexico Environment Department (NMED) approved the Class 2 Permit Modification Request on July 27, 2023.
Approval Letter
Response to Comments
NMED received a Class 2 Permit Modification Request 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.
Mixed Waste Landfill (MWL) Five-Year Report
NMED approved the MWL Five-Year Report on July 9, 2021.
Approval Letter
NMED Response to Comments on the Five-Year Report
NMED issued a public notice for comment on the Sandia National Laboratories’ 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.
Mixed Waste Landfill (MWL) Five-Year Report (December 14, 2018)
Public Notice (English) (May 24, 2019)
Public Notice (Spanish) (May 24, 2019)
December 14, 2018 – SNL Submittal of Mixed Waste Landfill (MWL) Five-Year Report
Public Involvement Plan for Public Notice of Mixed Waste Landfill Five-Year Report, January 2019
Corrective Action Complete for the Mixed Waste Landfill
Final Decision – 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.
Final Order (February 12, 2016)
Hearing Office Report (October 13, 2015)
Approval Letter (February 18, 2016)
Interested Person Letter (February 18, 2016)
Response to Comments (February 2016)
Modified Permit
Permit Attachment K – Solid Waste Management Units and Areas of Concern
Permit Attachment M – Long-Term Monitoring and Maintenance Plan for Solid Waste Management Units and Areas of Concern Granted Corrective Action Complete with Controls
Permit Attachment M, Figure 3 – Solid Waste Management Units – Corrective Action Complete with Controls, Tech Areas III and V
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.
Public Hearing Notice – 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:
Public Hearing Notice (English) (May 20, 2015)
Public Hearing Notice (Spanish) (May 20, 2015)
Public comment period extended – 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.
The notices extending the public comment period are below:
Citizen Letter and Public Notice (English) (March 17, 2015)
Citizen Letter and Public Notice (Spanish) (March 17, 2015)
Fact Sheet/Statement of Basis (January 12, 2015)
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.
Citizen Letter and Public Notice (English) (January 12, 2015)
Citizen Letter and Public Notice (Spanish) (January 12, 2015)
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
Proposed Permit Attachment M – 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
November 2014 – SNL Revised Notice of a Request for a Class 3 Permit Modification to Module IV of Hazardous Waste Permit for Sandia National Laboratories
October 17, 2014 – SNL Request for Class 3 Modification of Module IV of Hazardous Waste Permit for Sandia National Laboratories/New Mexico
October 2014 – SNL Notice of a Request for a Class 3 Permit Modification to Module IV of the Hazardous Waste Permit
October 14, 2014 – 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).
Volumes I through VIII can be viewed at the Lobo Vault by clicking here.
This document can also be viewed in its entirety by clicking here. Please note that it is approximately 200 MB in size.
This document can also be reviewed in its entirety by making arrangements with the New Mexico Environment Department – Hazardous Waste Bureau
October 8, 2014 – NMED Certificate of Completion for the Mixed Waste Landfill
September 25, 2014 – SNL Request for Certificate of Completion for the Mixed Waste Landfill
June 26, 2014 – NMED Reclamation of Mixed Waste Landfill Borrow Pit
December 9, 2013 – SNL Environmental Restoration Operations, Reclamation of the Mixed Waste Landfill Borrow Pit
MWL Long-Term Monitoring and Maintenance Plan (LTMMP) and Long-Term Monitoring and Maintenance Report
October 18, 2023 – NMED Approval MWL Annual LTMMR, April 2022-March 2023
June 26, 2023 – SNL MWL Annual LTMMR, April 2022-March 2023
August 8, 2022 – NMED Approval MWL Annual LTMMR, April 2021-March 2022
June 15, 2022 – SNL MWL Annual LTMMR, April 2021-March 2022
February 16, 2022 – NMED Approval Class 1 Modification with Prior Approval; Revisions to LTMMP
July 23, 2021 – NMED Approval MWL Annual LTMMR, April 2020 – March 2021
June 15, 2021 – SNL MWL Annual LTMMR, April 2020 – March 2021
July 2, 2020 – NMED Approval MWL Annual LTMMR, April 2019 – March 2020
May 27, 2020 – SNL MWL Annual LTMMR, April 2019 – March 2020
September 3, 2019 – NMED Approval MWL Annual LTMMR April 2018 – March 2019, June 2019
June 21, 2019 – SNL MWL Annual LTMMR, April 2018-March 2019
January 31, 2019 – NMED Acknowledgement of Receipt Updated Reference Docs Cited in the MWL LTMMP
July 13, 2018 – NMED Approval MWL LTMMR April 2017 – March 2018
June 7, 2018 – SNL MWL Annual LTMMR, April 2017 – March 2018, June 2018
April 6, 2018 – NMED Approval MWL Annual LTMMR, April 2016 – March 2017, June 2017
February 8, 2018 – SNL Submittal of Updated Reference Documents Cited in the MWL LTMMP
July 21, 2017 – NMED Acknowledgement of Receipt Submittal of the Mixed Waste Landfill (MWL) Updated Reference Documents Cited in the MWL Long-Term Monitoring and Maintenance Plan
July 6, 2017 – SNL Submittal of Updated Reference Document Cited in the MWL LTMMP
June 6, 2017 – SNL MWL Annual LTMMR, April 2016 – March 2017
November 4, 2016 – SNL Submittal of the MWL Updated Reference Documents Cited in the MWL LTMMP
October 20, 2016 – NMED Acknowledgement of Receipt Historical Records Disclosure Affirmation: Contents of Solid Waste Management Unit 76, Mixed Waste Landfill, Sandia National Laboratories, May 2016
July 20, 2016 – NMED Approval MWL LTMMP, April 2015 – March 2016
June 21, 2016 – SNL MWL Annual LTMMR, April 2015 – March 2016
May 20, 2016 – SNL Update Reference Documents Cited in the MWL LTMMP
May 16, 2016 – SNL Historical Records Disclosure Affirmation: Contents of Solid Waste Management Unit 76, Mixed Waste Landfill, Sandia National Laboratories, May 2016
March 22, 2016 – NMED Correction – Approval MWL Annual LTMMR, April 2014 – March 2015, June 2015
October 16, 2015 – NMED Approval MWL Annual LTMMR, April 2014 – March 2015, June 2015
June 5, 2015 – SNL Submittal of MWL LTMMR, April 2014-March 2015
May 5, 2015 – 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
February 23, 2015 – Court of Appeals of New Mexico Opinion on Approval of the LTMMP
February 18, 2015 – SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill (MWL) Long-Term Monitoring and Maintenance Plan (LTMMP)
November 14, 2014 – SNL early release of MWL soil vapor monitoring September 2014 Results
September 25, 2014 – NMED Approval Installation of Three FLUTe Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL-SV05) at the Mixed Waste Landfill
September 10, 2014 – SNL Environmental Restoration Operations Installation of Three FLUTe Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL-SV05) at the Mixed Waste Landfill
August 6, 2014 – NMED Approval Mixed Waste Landfill Annual Long-Term Monitoring & Maintenance Report, January-March 2014, June 2014
July 9, 2014 – SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill Long-Term Monitoring and Maintenance Plan
June 18, 2014 – SNL Submittal of Mixed Waste Landfill Annual Long-Term Monitoring and Maintenance Report, January – March 2014
March 6, 2014 – SNL Submittal of Reference Documents Cited in the MWL Long-Term Monitoring and Maintenance Plan
February 14, 2014 – 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
January 15, 2014 – SNL Work Plan for the Installation of Three Soil-Vapor Monitoring Wells (MWL-SV03, MWL-SV04, and MWL SV05) at the Mixed Waste Landfill
January 8, 2014 – The LTMMP was approved by NMED on January 8, 2014 – Approval Letter and Response to Comments
February 11, 2013 – 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.
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.
February 6, 2013 – NMED Presentation at the Albuquerque-Bernalillo County Water Protection Advisory Board public forum on the Sandia National Laboratories’ Mixed Waste Landfill. The meeting was held at the Veteran’s Memorial Museum in Albuquerque from 6:30 p.m. to 8:30 p.m.
Public Comment Period Extended – 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.
Second Extension of Public Comment Period
December 18, 2012 – Interested Citizen Letter and Public Notice of Extension of Public Comment Period – English version
December 18, 2012 – Interested Citizen Letter and Public Notice of Extension of Public Comment Period – Spanish version
First Extension of Public Comment Period
November 19, 2012 – Interested Citizen Letter and Public Notice of Extension of Public Comment Period – English version
November 19, 2012 – Interested Citizen Letter and Public Notice of Extension of Public Comment Period – Spanish version
October 16, 2012 – Public Dialogue Meeting – 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.
NMED Presentation
SNL Presentation
September 14, 2012 – Interested Person Letter and Public Notice of the Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill
March 23, 2012 – SNL Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill
December 7, 2011 – SNL withdrawal of 2007 Long-Term Monitoring and Maintenance Plan for the Mixed Waste Landfill
Public Comment Period – 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
11-26-2007 Linda Lillow
11-27-2007 Lesley Weinstock
12-8-2007 Gray Panthers
1-31-2008 Citizen Action
December 17, 2007 – Extended Public Comment Period
October 31, 2007 – Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan – English version
October 31, 2007 – Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan – Spanish version
October 31, 2007 – Public Comment Period
October 31, 2007 – Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan – English version
October 31, 2007 – Interested Person Letter and Public Notice on the Long-Term Monitoring and Maintenance Plan – Spanish version
September 2007 – Long-Term Monitoring and Maintenance Plan for the MWL
MWL Corrective Measures Implementation Report
October 14, 2011 – NMED Notice of Approval Mixed Waste Landfill Corrective Measures Implementation Report, January 2010
August 11, 2011 – 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
Cover Letter
Responses to Notice of Disapproval, August 2011
Corrective Measures Implementation Report
Appendix A, Volume 1
Appendix A, Volume 2 – Attachments
Corrective Measures Implementation Report (1-26-2010)
May 20, 2011 – NMED Notice of Disapproval Mixed Waste Landfill Corrective Measures Implementation Report, January 2010
May 20, 2011 – NMED Letter to Commenters on the MWL CMI Report
May 20, 2011 – NMED Response to Comments regarding the MWL CMI Report
Comments received during the public comment period on the MWL CMI Report
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.
January 28, 2011 – Public Notice extending the comment period of the MWL CMI Report
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 – NMED Presentation on the MWL Corrective Measures Implementation Report at Cesar Chavez Community Center (491 KB)
November 29, 2010 – Public Notice of Comment Period for the MWL Corrective Measures Implementation (CMI) Report
MWL Sampling and Analysis Plan for VOCs, Tritium, and Radon at MWL
September 26, 2008 – NMED Approval of the Investigation Report on the Soil-Vapor Volatile Organic Compounds, Tritium, and Radon Sampling at the MWL
August 2008 – Investigation Report on the Soil-Vapor Volatile Organic Compounds, Tritium, and Radon Sampling at the MWL
July 25, 2008 – NMED Time Extension to Submit Soil-Vapor Investigation Report
July 10, 2008 – SNL Request for Time Extension to Submit Soil-Vapor Investigation Report
February 15, 2008 – Interested Person Letter
Response to Comments
February 14, 2008 – Approval with Modifications Letter
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.
Southwest Research and Information Center (5-15-2007)
Citizen Action (Including Attachments) (5-15-2007)
R. Gilkeson (5-15-2007)
Citizen Action (5-1-2007)
Citizen Action (4-27-2007)
Jeanne House (3-5-2007)
Southwest Research and Information Center (3-1-2007)
Citizen Action (2-28-2007)
D. Lennihan (2-13-2007)
April 13, 2007 – Interested Citizen Letter and Meeting Notice on the Sampling and Analysis Plan – English and Spanish
February 5, 2007 – Interested Citizen Letter and Public Notice on the Sampling and Analysis Plan – English and Spanish
December 2006 – Sampling and Analysis Plan for VOCs, Tritium, and Radon at MWL
MWL Corrective Measure Implementation Plan
March 23, 2011 – SNL Request for Approval to Implement Supplemental Watering Activities for the Mixed Waste Landfill (MWL) Evapotranspirative (ET) Cover
April 8, 2010 – SNL MWL Quarterly Progress Report
December 21, 2009 – MWL Quarterly Progress Report, Evapotranspirative Cover Construction Project, August – October 2009
November 18, 2009 – NMED Quarterly Progress Report Evapotranspirative Cover Construction Project, May – July 2009
September 30, 2009 – Quarterly Progress Report – Evapotranspirative (ET) Cover Construction Project, May – July 2009
April 10, 2009 – Execution of MWL CMI Plan
February 12, 2009 – Replacement Pages for the MWL CMI Plan, November 2005
December 22, 2008 – Conditional Approval of the MWL CMI Plan
November 26, 2008 – SNL Response to NOD on the MWL CMI Plan
October 10, 2008 – Notice of Disapproval on the MWL CMI Plan
November 21, 2006 – Interested Citizen Letter and Response to Comments
Public Comments Received on CMI Plan
May 25, 2006 – 14-Day Interested Citizen Letter and Public Notice
Public Dialogue Agenda for the May 25, 2006 meeting on the CMI Plan
May 4, 2006 – Interested Citizen Letter and Notice of Public Dialogue on the CMI Plan – English and Spanish
April 24, 2006 – SNL Response to Public Comment
December 9, 2005 – Interested Citizen Letter and Public Notice
January 19, 2007 – SNL Response to Comments (Part 2) on the CMI Plan
Attachment 1 – Supporting Documentation and Supplemental Information Regarding the Fate and Transport Model (CD)
Appendix A – SANDIA REPORT, SAND2007-0170, Probabilistic Performance-Assessment Modeling of the Mixed Waste Landfill at Sandia National Laboratories (2nd Edition) (1-2007)
December 15, 2006 – SNL Response to Comments (Part 1) on the CMI Plan
November 20, 2006 – Notice of Disapproval Letter to SNL
November 2005 – Corrective Measures Implementation Plan
MWL Subgrade
March 23, 2007 – NMED Response Letter on subgrade measures
March 13, 2007 – SNL Letter requesting precautionary measures to the subgrade
September 18, 2006 – Fence Removal and Subgrade Preparation
July 12, 2006 – SNL Letter on MWL Fence Removal and Preparation
June 10, 2010 – EPA response to Senator Bingaman on review of Evaluation of the Representativeness and Reliability of Groundwater Monitoring Well Data, Mixed Waste Landfill
November 2006 – Evaluation of the Representativeness and Reliability of Groundwater Monitoring Well Data, Mixed Waste Landfill
MWL Fate and Transport Model
November 2005 – Fate and Transport (Probabilistic Performance – Assessment Modeling of the MWL
References
Supplemental Information on Models and Software Used for Fate and Transport Modeling of the Mixed Waste Landfill. Citations referenced within this document can be found by clicking here.
February 2005 – Calculation Set for Design and Optimization of Vegetative Soil Covers, Sandia National Laboratories, Albuquerque, New Mexico
January 2007 – Probabilistic Performance-Assessment Modeling of the Mixed Waste Landfill at Sandia National Laboratories (2nd Edition)
EPA Assessment of Risks from Radon in Homes
1997 Radon Flux Testing Results at the MWL (Hans Oldewage)
MWL Groundwater and Monitoring Well Documents
Also see Consolidated Quarterly Reports and the Annual Groundwater Monitoring Reports for additional information.
June 28, 2016 – SNL Calendar Year 2015 Annual Groundwater Monitoring Report
March 10, 2015 – NMED Approval Mixed Waste Landfill Groundwater Monitoring Report, Monitoring Well MWL-MW4 Metals Data, September 2014 Pumping and Sampling , January 2015
February 18, 2015 – SNL Submittal of Updated Reference Documents Cited in the Mixed Waste Landfill (MWL) Long-Term Monitoring and Maintenance Plan (LTMMP)
February 18-2015 – SNL Mixed Waste Landfill Groundwater Monitoring Report – Monitoring Well MWL-MW4 Metals Data – September 2014 Pumping and Sampling, January 2015
October 8, 2014 – NMED – Draft Groundwater Monitoring at Sandia National Laboratories Mixed Waste Landfill: MWL-MW4 Metals Study Conducted by the NMED DOE Oversight Bureau
July 24, 2014 – NMED Mixed Waste Landfill Groundwater Monitoring Report – Groundwater Monitoring Well MWL-MW4 – Calendar Year 2013
May 20, 2014 – SNL Environmental Restoration Operations Mixed Waste Landfill Groundwater Monitoring Report -Monitoring Well MWL-MW4 Metals Data
March 23, 2011 – SNL Request for Approval to Implement Supplemental Watering Activities for the Mixed Waste Landfill (MWL) Evapotranspirative (ET) Cover
September 30, 2011 – Mixed Waste Landfill Groundwater Monitoring Report Calendar Year
January 13, 2011 – Notice of Approval MWL Toluene Investigation Report, Revised October 2010
October 20, 2010 – Response to September 28, 2010, NMED comments on the MWL Toluene Investigation Report
August 23, 2010 – SNL MWL Toluene Investigation Report August 2010
July 14, 2010 – Groundwater Monitoring at Sandia National Laboratories/New Mexico Mixed Waste Landfill Conducted by NMED/DOE OB for FFY 2010 Q-2
June 7, 2010 – MWL Groundwater Monitoring Report Calendar Year 2009
June 7, 2010 – NMED Notice of Approval: Responses to Notice of Disapproval Issued for Mixed Waste Landfill Groundwater Monitoring Report, Calendar Year 2008, May 2009
June 4, 2010 – NMED Approval of Extension Request for Toluene Investigation Report, Mixed Waste Landfill
May 21, 2010 – SNL Extension Request for the Toluene Investigation Report Required for the MWL
April 30, 2010 – Toluene Detections in Groundwater Sandia National Laboratories Mixed Waste Landfill
February 22, 2010 – Groundwater Monitoring at Sandia National Laboratories/New Mexico Mixed Waste Landfill Conducted by NMED/DOE OB for FFY 2009 Q-4
December 23, 2009 – SNL Responses to NMED’s Notice of Disapproval: MWL Groundwater Monitoring Report, Calendar Year 2008
October 29, 2009 – Notice of Disapproval: MWL Annual Groundwater Monitoring Report for Calendar Year 2008
June 18, 2009 – NMED Groundwater Split Sampling of SNL Wells MWL-BW2, MWL-MW7, MWL-MW8, MWL-MW9 and CTF-MW2
May 27, 2009 – SNL MWL Annual Groundwater Monitoring Report for Calendar Year 2008
January 15, 2009 – NMED Notice of Approval: 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 Installation of Groundwater Monitoring Wells MWL-MW7, MWL-MW8, and MWL-MW9, September 2008
October 31, 2008 – NMED Approval of the Summary Report for MWL Monitoring Well Plug and Abandonment and Installation – Decommissioning of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2
October 3, 2008 – SNL Response to the 8-25-2008 Notice of Disapproval on the Summary Report for MWL Monitoring Well Plug and Abandonment and Installation – Decommissioning of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2
September 2008 – 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
August 25, 2008 – NMED Notice of Disapproval: Summary Report for MWL Monitoring Well Plug and Abandonment and Installation – Decommissioning
of Groundwater Monitoring Well MWL-BW1 Installation of Groundwater Monitoring Well MWL-BW2
April 23, 2008 – 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
March 6, 2008 – 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
February 21, 2008 – SNL MWL Annual Groundwater Monitoring Report Spring 2007 Sampling Event
February 12, 2008 – NMED Letter on the Location of Monitoring Wells MWL-MW7 and MW8
December 5, 2007 – SNL Response to NMED’s 10-30-2007 Notice of Approval
October 30, 2007 – 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
October 26, 2006 – NMED Notice of Approval Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan TAV-MW1 and TAV-MW10
October 12, 2007 – NMED Correction-Notice of Approval Monitoring Well Plug and Abandonment Plan MWL-BW1 Replacement Well MWL-BW2
October 10, 2007 – NMED Notice of Approval Monitoring Well Plug and Abandonment Plan MWL-BW1 Replacement Well MWL-BW2
August 10, 2007 – SNL Response Monitoring Well Plug and Abandonment Plan and Replacement Well Construction TAV-MW1 and TAV-MW10
August 10, 2007 – SNL Monitoring Well Plug and Abandonment Plan and Replacement Well Construction MWL-MW1, MWL-MW3, MWL-MW7 and MWL-MW8
August 3, 2007 – SNL Response Monitoring Well Monitoring Well Plug and Abandonment Plan and Replacement Well Construction MWL-BW1 and MWL-BW2, Revision 1
July 2, 2007 – NMED Require SNL to Replacement MWL Wells MW1 and MW3
June 26, 2007 – NMED Notice of Disapproval on the Monitoring Well Plug and Abandonment Plan and Replacement Well Construction for TAV-MW1 and TAV-MW10
June 19, 2007 – NMED Notice of Disapproval on the Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan for BW-1 and BW-2
April 17, 2007 – SNL Monitoring Well Plug and Abandonment Plan and Replacement Well Construction Plan for BW-1 and_BW-2
March 23, 2007 – NMED Letter on MWL-BW1 Monitoring Well Replacement
December 13, 2006 – SNL MWL Annual Groundwater Monitoring Report April 2006
February 6, 2004 – Compilation of Monitoring Well Construction Diagrams Contained in SNL/ER Project Well Database
September 24, 1994 – Review of Ground-Water Monitoring at Sandia National Laboratories’ Mixed Waste Landfill
MWL Corrective Measures Study – Remedy Selection
MWL Appeal Documents on Final Decision
Supreme Court
New Mexico Supreme Court Writ of Certiorari Denied (Filed 2-26-2008)
NMED Response to Petition for Writ of Certiorari (Filed 2-15-2008)
SNL Response to Petition for Writ of Certiorari (Filed 2-15-2008)
Petition for Writ of Certiorari (Filed 1-29-2008)
Court of Appeals
Court of Appeals Opinion on Citizen Action Appeal (Filed 12-19-2007)
Appelant’s Reply Brief (Filed 2-23-2007)
Appellant’s Brief-in-Chief (Filed 10-10-2006)
MWL Final Decision Documents and Response to Comments
Response to Comments (08-02-2005)
Interested Citizen Letter-Final Decision (08-02-2005)
Permit Language for the Mixed Waste Landfill
Hearing Officer’s Proposed Findings of Fact and Conclusion of Law (05-20-2005)
Hearing Officer’s Substitute Pages for Interlineations in Report (05-24-2005)
Hearing Officer’s Report – Findings of Fact and Conclusion of Law (05-20-2005)
Final Order (05-26-2005)
MWL Class 3 Permit Modification for Corrective Measures (August 11, 2004)
Interested Citizen Letter – English version
Interested Citizen Letter – Spanish version
Public Notice / Hearing Notice- English version
Public Notice / Hearing Notice- Spanish version
Fact Sheet
Draft Permit
Administrative Record Index
MWL Corrective Measures Study
Permit Modification Request (01/23/2004)
CMS Report deemed Complete (01/05/2004)
SNL Response to CMS Report NOD (12/19/2003)
Notice of Deficiency (NOD; 11/05/2003)
CMS Report
CMS Figures
CMS Tables
Appendix A (Description of Preferred Technologies)
Appendix B (Cost Summary Reports)
Appendix C (Cost Detail Reports)
Appendix D (Cost Overtime Reports)
Appendix E (Cost Worksheet)
Appendix F (Additional Cost Details)
Appendix G (Technical Approach & Cost Estimate)
Appendix H (Evaluation of Near Term Excavation)
Appendix I (Risk Assessment)
NMED Letter Requiring Corrective Measures Study for the Mixed Waste Landfill (10-11-2001)
SNL Consolidated Quarterly Reports