DAQ-2024-008160

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor
DAQC-493-24
Site 14031 (B1)

Tyler Hodson
Kilgore Companies, LLC
7057 West 2100 South
Salt Lake City, Utah 84128

Dear Mr. Hodson:

Re: Kilgore Companies, LLC – Temporary Relocation Modification to DAQC-234-24 –
Additional Screening Plant – Tooele County

Your request dated April 19, 2024, to add a screening plant to the temporary project at the Kilgore
Companies’ Stockton aggregate facility, located at 555 North Highway 36, Stockton, Utah was
received by the Utah Division of Air Quality (DAQ) and has been reviewed.

The following equipment has now been approved for operation for this temporary project:

Keestrack K6 mobile screening plant with a 79-kW diesel engine
KPI K-350 cone crusher
KPI/JCI screen
Bin feeder

The State of Utah has permitted portable equipment for Kilgore Contracting, LLC on the
Approval Order (AO) DAQE-AN129310019-18 dated April 12, 2018. The above referenced
location is a permitted aggregate facility with established equipment hours of operation and
production limits. All equipment operating at this site must be in accordance with the current
Stockton Facility AO DAQE-AN140310004-22 dated December 22, 2022. The production of
aggregate from all temporary projects when combined with the permanent equipment’s production
cannot exceed the 12-month rolling limits as per Condition II.B.1.a of this AO. The operation of
the equipment must be compliant with this facility’s hourly limits as established by Conditions
II.B.1.b, II.B.1.c, II.B.1.d, and II.B.1.e.

6 Û Ü Û Ù Û Ý
DAQC-493-24
Page 2

Approval is granted to relocate and operate this equipment at the new location for a period not to
exceed 180 operational days. As per Utah Administrative Code (UAC) R307-401-17, the
operation of equipment at this temporary site may be for up to 180 working days in any calendar
year not to exceed 365 consecutive days, starting from the initial relocation date.

The owner/operator shall maintain records of the actual operation hours, days, and production
rate, of the above referenced equipment at this relocation site and have the ability to submit the
information to the DAQ upon the request of representatives of the director. Please make certain
that the plant operator is aware of all the location specific requirements for this site and the
conditions of the aforementioned AO.

Federal New Source Performance Standards Subpart OOO requires that initial Method 9
observations be performed for all applicable portable crushers, screens and attached conveyors.
Subpart OOO also mandates that all crushers constructed, modified, or reconstructed on or after
April 22, 2008, which are not enclosed, must install spray bars on the equipment and keep
maintenance records to ensure proper spray bar operations.

Utah Division of Water Quality Storm Water Permits and regulations may apply to this temporary
project. Please refer to Utah DEQ Water Quality’s current Storm Water Construction
requirements for additional information.

This approval for relocation in no way releases the owner or operator from any liability for
compliance with all other applicable federal, state, and local regulations including the UAC.

If you have any questions regarding this relocation authorization or the temporary relocation
process please contact Susan Weisenberg at [phone].

Sincerely,

Jay P. Morris
Assistant Director

JPM:SW:rh

Enclosure: Submitted Temporary Relocation Form

cc: Tooele County Health Department
4 * - - $ . — 4 A A v A ? A C @ A w A A ˜
Susan Weisenberg <[e-mail]>
RE: Relocation to Stockton authorization
1 message
Tyler Hodson <[e-mail]>Tue, May 21, 2024 at 1:09 PM
To: Susan Weisenberg <[e-mail]>
Hi Susan,

I just wanted to follow up on the below request to add a screening plant to our TRP at the Stockton Pit
located Tooele County. I just wanted to double check that we will be able to add the screening plant or if we
need to provide more information.

Thank you,

Tyler Hodson
Administrative Environmental Manager
[phone]
[e-mail]

From: Tyler Hodson
Sent: Friday, April 19, 2024 11:45 AM
To: Susan Weisenberg <[e-mail]>
Cc: Bryan Jorgensen <[e-mail]>
Subject: RE: Relocaon to Stockton authorizaon

Hello Susan,

I am emailing you to request a modification to C-234-24 at the Stockton Pit located in Tooele County. We
would like to add the following equipment to the TRP:

Equipment Type: Mobile Screening Plant
Make/Model: Keestrack K6
5/21/24, 3:12 PM State of Utah Mail - RE: Relocation to Stockton authorization
https://mail.google.com/mail/u/0/?ik=bffac613d3&view=pt&search=all&permthid=thread-a:r-205035575158834003%7Cmsg-f:1799690481925871448…1/3
Serial #:
Manufactured Date: 2024
Design Capacity: 600 tph
Engine Capacity: 79 kW/106 hp

Since this is a new unit, we don’t have a serial number for the unit yet. If possible we’d like to move forward with the
above information, but please let me know if we need to track a serial number once we receive the unit.

Thank you,

Tyler Hodson
Administrative Environmental Manager
[phone]
[e-mail]

From: Susan Weisenberg <[e-mail]>
Sent: Wednesday, March 20, 2024 7:48 AM
To: Tyler Hodson <[e-mail]>
Subject: Relocaon to Stockton authorizaon

This message originated from outside your organization
Susan Weisenberg,
Environmental Scientist
Office: 385-306-6512

5/21/24, 3:12 PM State of Utah Mail - RE: Relocation to Stockton authorization
https://mail.google.com/mail/u/0/?ik=bffac613d3&view=pt&search=all&permthid=thread-a:r-205035575158834003%7Cmsg-f:1799690481925871448…2/3

5/21/24, 3:12 PM State of Utah Mail - RE: Relocation to Stockton authorization
https://mail.google.com/mail/u/0/?ik=bffac613d3&view=pt&search=all&permthid=thread-a:r-205035575158834003%7Cmsg-f:1799690481925871448…3/3