DSHW-2024-007841

August 19, 2024
John Kehs
Northrop Grumman Mission Systems
Post Office Box 1693, MS 1401
Baltimore, MD21203
RE:Groundwater Monitoring Well and Soil Vapor Monitoring Point Decommissioning ReportNorthrop Grumman Systems Corporation, 2211 West North Temple, Salt Lake City, UtahUTD073095804
Dear Mr. Kehs:
The Division of Waste Management and Radiation Control (Division) has completed its review of your
August9, 2024, submittal of the Groundwater Monitoring Well and Soil Vapor Monitoring Point Decommissioning Report(Report) for the Northrop Grumman Systems Corporation property located
at the address listedabove.
The Report details the decommissioning of groundwater wells MW-1, MW-3, MW-6, MW-8. MW-10. MW-12A, MW-12B, MW-13A, MW-13B, MW-13C, MW-14A, MW-14B, MW-14C, and MW-15C. Additionally monitoring
well MW-5 was damaged and replaced with MW-5R.
The Report also details the decommissioning of soil vapor monitoring points SS-3, SS-4,SS-6,SS-9,SS-10,SS-12, and SS-15.
The report is hereby approved.
If you have any questions, please call Brad Lauchnor at [phone]
Sincerely,
Douglas J. Hansen,Director
Division of Waste Management and Radiation Control
DJH/BML/
c:Dorothy Adams, Health Officer, Salt Lake County Health Dept.
Ron Lund, Environmental Health Director, Salt Lake County Health Dept.
Eric Peterson, Environmental Health Deputy Director, Salt Lake County Health Dept.Andrew Riemer, Stantec (email) [e-mail] Maxwell, Stantec (email) [e-mail]
Kehs, Northrop Grumman Mission Systems (email & hard copy)[e-mail]