Completed Activities

Friday, December 6, 2019
December 6, 2019
NMI Superfund Site RD/RA Consent Decree becomes effective.
Friday, December 6, 2019
Monday, December 9, 2019
December 9, 2019
Summary of On-Going Work under the Groundwater NTCRA is submitted.
Monday, December 9, 2019
Monday, December 12, 2019
December 12, 2019
Settling Defendants (SDs) designate de maximis, inc. as Project Coordinator and Supervising Contractor.
Monday, December 12, 2019
Tuesday, December 31, 2019
December 31, 2019
Project Coordinator and Supervising Contractor de maximis, inc., is given Authorization to Proceed by USEPA.
Tuesday, December 31, 2019
Sunday, January 5, 2020
January 5, 2020
Trust Agreement is submitted to USEPA for approval.
Sunday, January 5, 2020
Tuesday, January 21, 2020
January 21, 2020
USEPA approves Trust Agreement.
Tuesday, January 21, 2020
Monday, March 23, 2020
March 23, 2020
Excess PPE from Building NCTRA is donated to the Concord Fire Department to assist in COVID-19 efforts.
Monday, March 23, 2020
Thursday, March 26, 2020
March 26, 2020
Remedial Design Work Plan and associated documents are submitted to USEPA for approval.
Thursday, March 26, 2020
Thursday, April 2, 2020
April 2, 2020
Groundwater Treatment System Annual Report is submitted to USEPA in accordance with the O&M Plan.
Thursday, April 2, 2020
Friday, April 3, 2020
April 3, 2020
Groundwater NTCRA Construction Completion and Final Report are submitted to Agencies.
Friday, April 3, 2020
Friday, April 17, 2020
April 17, 2020
Wetland and property surveys are complete.
Friday, April 17, 2020
Thursday, May 28, 2020
May 28, 2020
USEPA approves the Groundwater Treatment System Annual Report. Conditional approval is received on the Groundwater NTCRA Construction Completion and Final Report to the Agencies.
Thursday, May 28, 2020
May, 2020
May, 2020
Survey of the 2229 Main Street property is complete.
May, 2020
May, 2020
May, 2020
Radiation Safety Training was provided for consultants and the Agencies.
May, 2020
Monday, July 27, 2020
July 27, 2020
Installation begins on wells MW-BS50 and MW-BS54.
Monday, July 27, 2020
September, 2020
September, 2020
Installation began for bedrock extraction wells through overburden. Mark out and survey of soil sample locations are completed.
September, 2020
Friday, September 11, 2020
September 11, 2020
Final RDWP and all appendices apart form Appendices E & I are submitted.
Friday, September 11, 2020
Tuesday, September 15, 2020
September 15, 2020
USEPA approves RDWP and Appendices A, B, C, D, F, H, K & L.
Tuesday, September 15, 2020
October, 2020
October, 2020
Office trailer and radiation lab setup is complete.
October, 2020
October, 2020
October, 2020
Down hole geophysics at BEW1 through BEW-4 are completed. Ground Penetrating Radar surveys are completed in Northern Parking lot and landfill area.
October, 2020
October, 2020
October, 2020
Temporary treatment system for extracted groundwater from BEW pump tests is complete.
October, 2020
Thursday, October 1, 2020
October 1, 2020
USEPA approves RDWP Implementation Plans.
Thursday, October 1, 2020
Thursday, October 8, 2020
October 8, 2020
USEPA approves RDWP Appendices E (QAPP) and J (TSWP).
Thursday, October 8, 2020
Sunday, October 18, 2020
October 18, 2020
USEPA approves RD/RA Appendix C - Holding Basin Containment Pre-Design Investigation Work Plan, Attachment 4 - Addendum 1 (submitted October 13, 2020).
Sunday, October 18, 2020
Sunday, October 27, 2020
October 27, 2020
USEPA approves PDI Water Treatment and Disposal Approach (submitted October 20, 2020).
Sunday, October 27, 2020
November, 2020
November, 2020
Soil samples are collected from within the Holding Basin for geotechnical data necessary for cover system design. Demobilization of equipment out of the Holding Basin is completed safely and successfully.
November, 2020
November, 2020
November, 2020
Adequate treatment for uranium and 1,4 dioxane are indicated by the 7-day continuous Pump-Test at BEW-2.
November, 2020
November, 2020
November, 2020
Step-Test and 7-day continuous Pump-Test are completed at BEW-3. To date, 129,000 gallons of extracted water has been treated.
November, 2020
November, 2020
November, 2020
Ground Penetration Radar survey of the landfill is completed. Drone survey of the gabion wall is complete.
November, 2020
December, 2020
December, 2020
76,875 gallons of IDW-water generated throughout drilling activities are shipped and disposed.
December, 2020
December, 2020
December, 2020
Six Piezometers are installed in the Cooling Water Pond.
December, 2020
Wednesday, December 16, 2020
December 16,2020
Recollection of Treatability Study Sample Soils is submitted to USEPA.
Wednesday, December 16, 2020
January, 2021
January, 2021
Monitoring wells and borings associated with the first round of PDI activities are installed.
January, 2021
January, 2021
January, 2021
CMT's are installed around the perimeter of the Holding Basin. Soils are recollected for the Treatability Study.
January, 2021
Friday January 15, 2021
January 15, 2021
Drill crews demobilize for the winter.
Friday January 15, 2021
February, 2021
February, 2021
Perimeter site fencing is reinstalled.
February, 2021
Monday, February 16, 2021 & Monday, February 23, 2021
February 16, 2021 & February 23, 2021
PDI data and initial findings are reviewed and presented to the Agencies.
Monday, February 16, 2021 & Monday, February 23, 2021
March, 2021
March, 2021
On-site scale is re-calibrated and certified for future work.
March, 2021
Wednesday 24, 2021
March 24, 2021
Site Wide Soild and Sediment PDWP Addendum #3 is submitted.
Wednesday 24, 2021
Thursday, March 25, 2021
March 25, 2021
USEPA approves Bedrock PDWP Addendum regarding Deep Bedrock Wells at MW-13 and MW-28 clusters.
Thursday, March 25, 2021
Monday, March 29, 2021
March 29, 2021
Access agreement is executed with Valley Sports for access to 2320 Main Street property.
Monday, March 29, 2021
Wednesday, March 31, 2021
March 31, 2021
Community members are updated on PDI progress and remaining investigative work in a community group meeting.
Wednesday, March 31, 2021
Wednesday, April 7, 2021
April 7, 2021
Additional geoprobe sampling identified in SSS PDIWP Addendum #3 is complete.
Wednesday, April 7, 2021
Monday, April 19, 2021
April 19, 2021
The second comprehensive sampling event (as required by the Site Wide Monitoring Plan) is complete.
Monday, April 19, 2021
Thursday , April 22, 2021
April 22, 2021
The rotosonic rig is mobilized to Valley Sports and drilling began through overburden at MW-BS52, MW-BS53, and MW-SD15.
Thursday , April 22, 2021
April 28, 2021
April 28, 2021
Initial test pits presented in the original PDIWP and five additional test pits identified in SSS PDI Addendum #3 are complete.
April 28, 2021