DERR-2024-010054

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144840 • Salt Lake City, UT 84114-4840
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah
SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor
Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF ENVIRONMENTAL
RESPONSE AND REMEDIATION

Brent H. Everett
Director
ERRL-0344-24

August 19, 2024

CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Trevor Johnson
Intermountain Power Service Corp.
850 West Brush Wellman Road
Delta, Utah 84624

Re: No Further Action, Aboveground Petroleum Storage Tank Release
Intermountain Generating Station, located at 850 West Brush Wellman Road, Delta, Utah
Facility Identification No. 2000075, Release Site OKY

Dear Mr. Johnson:

The file for this 2024 product line/aboveground petroleum storage tank release has been
reviewed by the Division of Environmental Response and Remediation (DERR) project manager who
has recommended that no further corrective action be taken at this time. This no further action applies
only to the specific Release Site OKY. This recommendation is based on the information contained in
the file for this release. That information was supplied by you, your consultant, or another representative.

The information submitted indicates that any detectable petroleum contamination from this
release is not a threat to human health or the environment according to Utah Admin. Code rule R311-
211. In the future, if other evidence indicates a spread of contamination from this release which may
cause a threat, further corrective action may be required.

If you have any questions concerning this letter, please contact Eileen Brennan, the DERR
project manager, at [phone].

Sincerely,

Brent H. Everett, Director
Division of Environmental Response and Remediation
BHE/EB/rr

cc: Nathan Selin, Executive Director, Central Utah Public Health Department
Eric Larsen, Environmental Director, Central Utah Public Health Department
John Chartier, District Engineer, Utah Department of Environmental Quality
Dave S. Hansen, Certified UST Consultant, Rockwell Solutions, Inc.
Samantha Heusser, Environmental Program Manager, Division of Water Quality
MEMORANDUM
TO: Morgan Atkinson, PST Branch Manager
Division of Environmental Response and Remediation
THROUGH: Chris Howell, PST/Remedial Assistance Section Manager
Division of Environmental Response and Remediation
FROM:
DATE:
SUBJECT:
Scott Everett, Toxicologist
Division of Environmental Response and Remediation
Eileen Brennan, PST/Remedial Assistance Project Manager
Division of Environmental Response and Remediation
August 13, 2024
Unregulated APST NFA-Closure Review Memo
~
CH
Intermountain Generating Station, located at 850 W. Brush Wellman Rd., Delta, Utah
Facility Identification No. 2000075, Release Site OKY
A piping leak was discovered on the morning of July 8, 2024, when diesel was observed in a ditch to
the east of the power plant buildings. Soil was excavated from the ditch and disposed/burned via the
power plant's coal pile. Groundwater is estimated at 60+ ft. Confirmation soil samples at 4-6 ft deep
were all below detection and/or below ISLs for all compounds.
The NF A package with supporting documents for the release can be found here:
Google Drive File Location:
https ://drive. google .com/ drive/folders/ 18KOFkurlfKF0UhGp0tXFhDK5 69rvob4q?usp=drive link
orm:
LUST/RA>>Closures>>OKY IPSC power plant, Delta
Please initial this memo when your closure package review is complete. If you have questions,
comments or concerns with the closure, please discuss with the project manager.
Once this memo is complete, the NF A letter will be initiated through Adobe Sign for final signatures.
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lntermountain Power Service Corp.
ATTN: Trevor Johnson
850 W . Brush Wellman Rd.
Delta , UT 84624 . :,, .. I t I Ill 'I · .. -.. ..
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