DSHW-2016-006763 - 0901a0688060eb59

DSHW-2016-006763 195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144880 • Salt Lake City, UT 84114-4880
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

GARY R. HERBERT
Governor

SPENCER J. COX
Lieutenant Governor
Department of
Environmental Quality

Alan Matheson
Executive Director

DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Scott T. Anderson
Director

March 1, 2016

George Gooch, Manager
Environmental Services
ATK Launch Systems – Promontory
P.O. Box 707
Brigham City, UT 84302-0707

RE: Building M-81B Spill Report
ATK Launch Systems – Promontory Facility
UTD009081357

Dear Mr. Gooch:

The Division of Waste Management and Radiation Control has completed its review of ATK’s Report
on the spill of deluge water that occurred at Building M-81B when a coin of propellant that was being
cut ignited. As was reported by ATK, a sample of the water that was released from the building
contained 7 ppm perchlorate.

The results of the soil samples that were collected at the site are well below the EPA Regional Screening
Levels for perchlorate (residential scenario). In addition, contamination of groundwater beneath the
spill location is not a concern since the depth is approximately 280 feet and several monitoring wells are
situated down-gradient of the site.

Based on these factors, the Division agrees with ATK that no further action is necessary at the site. If
you have any questions, please call Jeff Vandel at [phone].

Sincerely,

Scott T. Anderson, Director
Division of Waste Management and Radiation Control

(Over)
STA/JV/jr

c: Lloyd C. Berentzen, MBA, Health Officer, Bear River Health Department
Grant Koford, EHS, Environmental Health Director, Bear River Health Department
Moye Lin, USEPA Region 8
Jason Wells, ATK Launch Systems