DSHW-2005-009744 - 0901a0688016619c

Paul Hancock, Manager
Environmental Remediation
ATK Thiokol Inc. – Promontory
P.O. Box 707
Brigham City, UT 84302-0707

RE: Work Plan for the Corrective Measure Pilot Test to Evaluate Ex-Situ Remediation of Perchlorate-Contaminated Soil, ATK Thiokol – Promontory Facility,
EPA ID #009081357

Dear Mr. Hancock:

The Division of Solid and Hazardous Waste has reviewed the Pilot Test Work Plan that was revised by EarthFax Engineering, Inc. and submitted to our office on September 28, 2005. The
review of the original Work Plan, that was submitted on July 1, 2005, raised a number of questions and comments, which were presented in our correspondence, dated August 26, 2005.
While approval for beginning the project was given at that time, the Division requested that Thiokol provide written responses to the questions and comments.

The Division has completed a review of the revised Work Plan and has determined that the questions and comments have been adequately addressed. Final approval of the Work Plan is hereby
granted. If you have any questions, please contact Jeff Vandel of my staff at [phone].

Sincerely,

ORIGINAL DOCUMENT SIGNED BY DENNIS R. DOWNS ON 10/05/05

Dennis R. Downs, Executive Secretary
Utah Solid and Hazardous Waste Control Board

DRD\JV\ts

c: Lloyd C. Berentzen, M.B.A., Health Officer/Director, Bear River Health Dept.
Nancy Morlock, USEPA Region VIII
Richard B. White, P.E., President, EarthFax Engineering, Inc.

File to: ATK Thiokol Inc. - Promontory
October 3, 2005
Page 2

October 5, 2005

TN200501329.doc
288 North 1460 West • PO Box 144880 • Salt Lake City, UT 84114-4880 • phone [phone] • fax [phone]
T.D.D. [phone] • www.deq.utah.gov

State of Utah

Department of Environmental Quality

Dianne R. Nielson, Ph.D.
Executive Director

DIVISION OF SOLID AND HAZARDOUS WASTE
Dennis R. Downs
Director

JON M. HUNTSMAN, JR.
Governor

GARY HERBERT
Lieutenant Governor