Groundwater Record of Decision (ROD)
DOE published a Record of Decision (ROD) outlining planned groundwater remediation activities at the site. The ROD describes monitoring and treatment approaches tailored to address the contaminants and potential impacts in each affected area of the site, as well as interim actions
Groundwater Interim Measures (GWIM) Implementation Plan
This work plan addresses Groundwater Interim Measures for the groundwater impacted location within the Area IV Former Sodium Disposal Facility (FSDF) to be implemented by DOE. DOE GWIM Work Plan
Groundwater Work Plan
This work plan presents the rationale and approach to data collection activities for portions of Area IV that are the responsibility of DOE. DOE Groundwater Area IV GW RI Work Plan
Groundwater Monitoring at SSFL
Groundwater is monitored for both radiological and chemical contaminants at and surrounding SSFL in approximately 300 groundwater wells.
- 2006 Annual Groundwater Report, Volume I, February 28, 2007
- 2006 Annual Groundwater Report, Volume II, February 28, 2007
- 2007 Annual Groundwater Report, Volumes I & II, February 28, 2008
- 2008 Annual Groundwater Report. Text. February 27, 2009
- 2008 Annual Groundwater Report. Tables & Figures. February 27, 2009
- 2008 Annual Groundwater Report. Appendices. February 27, 2009
- 2009 Annual Groundwater Report. February 26, 2010
- 2010 Annual Groundwater Report March 1, 2011
- Addendum to 2010 Annual Groundwater Report, April 2011
- Appendix A - Monitoring Well and Piezometer Construction Data
- Appendix B - Precipitation and Seeps in the Vicinity of WS-09A
- Appendix C - Hydrographs
- Appendix D - Time Series Plots
- Appendix E - Laboratory Analytical Reports (Abridged in entirety to limit file size)
- Appendix F - Quality Assurance Assessment (Abridged to limit file size)
- Appendix G - Corrected Chemical Results
- 2011 Annual Groundwater Report
- 2012 Annual Groundwater Report
- Appendix A- Monitoring Well and Piezometer Construction Data
- Appendix B - Precipitation and Seeps in the Vicinity of WS-09A
- Appendix C- Water Level Hydrographs
- Appendix D- Time Series Plots of Analytical Data
- Appendix E - Laboratory Analytical Reports (Abridged in entirety to limit file size)
- Appendix F- Quality Assurance Assessment
- 2014 Annual Groundwater Report
- Appendix A: Monitoring Well and Piezometer Construction Data
- Appendix B: Precipitation Data
- Appendix C: Water Level Hydrographs
- Appendix D: Time Series Plots of Analytical Data
- Appendix E - Laboratory Analytical Reports (Abridged in entirety to limit file size)
- Appendix F: Quality Assurance Assessment
- 2017 Annual Groundwater Report
Complete results of all historical radiological data are provided in Appendix E of the 2009 Annual Report.
Gross alpha, gross beta |
Table E-I |
Tritium |
Table E-II |
Man-made beta/gamma emitting radionuclides |
Table E-III |
Naturally occurring gamma emitting radionuclides |
Table E-IV |
Specific radionuclides including strontium-90, radium-226, radium-228, uranium-234, uranium-235, uranium-238, thorium-228, thorium-230, thorium-232, plutonium-238, plutonum-239/240 and americium-241 |
Table E-V |
Tritium in Groundwater
In 1989 tritium was initially discovered in groundwater in several locations of Area IV. The data was presented in the quarterly and annual grounwater monitoring reports and the Annual Site Environmental Monitoring Reports (ASERs).
A study of the potential sources of tritium was conducted. Building 4010, the site of a SNAP reactor, was determined to be the most likely source of tritium. Other potential sources were identified as the SRE, Buildings 4024, 4028, and 4059.
- RI/RD-92-186, "Tritium Production and Release to Groundwater at SSFL." December 1, 1992
In 2004, a series of groundwater wells were installed to retrieve samples from the potential sources of tritium. Tritium was found in several wells surrounding the location of the former Building 4010, confirming the earlier study.
The status of tritium in groundwater has been presented in the various DOE public meetings, most recently at the June 2006 public meeting .
- June 2006 Tritium Investigation Update
- Tritium investigation
- New tritium wells in Area IV
- Soil and Groundwater tests for tritium in Area IV
Seeps Sampling
This Memorandum documents the results of sampling seep monitoring probes conducted by CDM Smith for DOE April 4 to April 20, 2016.
Tech Memo DOE Area IV 2016 Seep Probe Sampling Results