DSHW-2011-011470 - 0901a068802eab08

December 16, 2011

Dave P. Gosen, P.E.
Director, Environmental Services
ATK Launch Systems – Promontory
P.O. Box 707
Brigham City, UT 84302-0707

RE: Class 1 Storage Permit Modification Request
UTD009081357

Dear Mr. Gosen:

The Division of Solid and Hazardous Waste has completed its review of ATK’s Storage Permit modification request, received on December 8, 2011, to expand the hours of operation at the
M-136 and M-225 Burn Grounds. The Division has determined that this is a Class 1 permit modification that requires prior approval.

The purpose for expanding the hours of operation (from 10:00 am to 6:00 pm to the proposed 6:00 am to 6:00 pm) is to provide ATK with the ability to conduct open burns in the morning
hours when winds are sometimes out of the north. This added operational flexibility will allow ATK to conduct burns where the generated smoke can blow back across ATK’s large property
and not towards off-site communities located to the north and east.

The permit modification is hereby approved. The modification to Condition IV.C.6.c is enclosed. Please make copies as necessary and replace this page in your copies of the Storage
Permit at Promontory.

In accordance with 40 CFR §270.42(a)(ii), ATK must send a notice of the modification to all persons on the facility mailing list, and the appropriate units of State and local government,
within 90 days after this approval.

If you have any questions, please contact Jeff Vandel at [phone].

Sincerely,

ORIGINAL DOCUMENT SIGNED BY SCOTT T. ANDERSON ON 12/16/2011

Scott T. Anderson, Executive Secretary
Utah Solid and Hazardous Waste Control Board

STA/JV/tjm

Enclosure

c: Nancy Morlock, US EPA Region VIII
George Gooch, ATK Launch Systems
Lloyd Berentzen, MBA, Health Officer, Bear River Health Department

TN201101321 2

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
TN201101321 Printed on 100% recycled paper

Solid and Hazardous Waste Control Board
Kevin Murray, Chair
Kory Coleman, Vice-Chair
Brian E. Brower
Scott Bruce
Jeff Coombs, MPH, LEHS
R. Ryan Dupont, Ph.D.
Larry A. Ellertson
Brad Mertz
Brett Mickelson
Gary Mossor
Dennis Riding
Dwayne Woolley
Amanda Smith
Scott T. Anderson
Executive Secretary

Department of Environmental Quality

Amanda Smith
Executive Director

DIVISION OF SOLID AND
HAZARDOUS WASTE
Scott T. Anderson
Director

State of Utah

GARY R. HERBERT
Governor

GREG BELL
Lieutenant Governor