DAQ-2025-002366

DAQE-MN100800001-25

M E M O R A N D U M

TO: Staker & Parson Companies Source File 10080

THROUGH: Alan Humpherys, Minor NSR Section Manager – Air Quality

FROM: Dylan Frederick, NSR Engineer – Air Quality

DATE: May 8, 2025

SUBJECT: Site ID 10080 is Inactive

_____________________________________________________________________________________

On August 28, 2024, The DAQ initiated a 10-year review for the Staker & Parson Companies’ Trenton
Pit. The Trenton Pit was issued an approval order (AO) under DAQE-AN0130470001-09 on November
16, 2009. This AO was issued a revocation at the source’s request on January 14th, 2010. The AO was for
operation as a stationary source. While the Trenton Pit AO has been revoked, Staker & Parson Companies
conducted temporary operations at the site under AO DAQE-AN1518009-05, dated March 15, 2005. This
AO was issued to allow aggregate processing equipment to be relocated to the site temporarily.

Utah Administrative Code Rule R307-209 became effective March 31, 2025, and establishes
requirements for portable aggregate processing plants, including concrete batch plants, asphalt plants, and
nonmetallic mineral processing plants. A Portable Aggregate Processing Plant as defined in Section
R307-209-2, is exempt from the requirement to obtain an Approval Order under UAC Rule R307-401-10.
Therefore, equipment in this AO can now be registered under this rule and no longer requires an Approval
Order to operate. Because the approval order was issued for portable aggregate equipment and not for a
permanent location, this AO is redundant.

Since the stationary source no longer operates and does not have an AO, and the portable AO is no longer
necessary, DAQ reached out to the source during the 10-year review and confirmed the source did not
want DAQ to update AO DAQE-AN1518009-05 and would conduct all portable operations under R307-
209. The source does not have any plans to conduct permanent operations at the Trenton pit. Therefore,
DAQ recommends this site be marked as inactive.

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

SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Tim Davis
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

4 ' ) - - $ &