DAQ-2025-001754

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DAQC-303-25
Site ID 12444 (B4)

MEMORANDUM

TO: STACK TEST FILE – STAKER PARSON COMPANIES – Keigley Quarry –
Utah County

THROUGH: Rik Ombach, Minor Source Oil and Gas Compliance Section Manager

FROM: Kyle Greenberg, Environmental Scientist

DATE: March 21, 2025

SUBJECT: Source: Hot Mix Asphalt Plant
Location: 12370 South West Mountain Highway, Genola, UT 84651
Contact: Chris Rose: 385-400-2119
Tester: Montrose Air Quality Services, LLC
Site ID #: 12444
Permit/AO #: Approval Order DAQE-AN124440011-24, dated August 13, 2024
Subject: Review of Pretest Protocol dated March 12, 2025

On March 14, 2025, DAQ received a protocol for testing of a Hot Mix Asphalt Plant at Keigley Quarry in
Genola, UT. Testing will be performed on June 24, 2025, to determine compliance with the emission limits
found in conditions II.B.1.b and II.B.4.c in Approval Order DAQE-AN1244400011-24.

PROTOCOL CONDITIONS:

1. RM 1 used to determine sample velocity traverses: OK
2. RM 2 used to determine stack gas velocity and volumetric flow rate: OK
3. RM 3 used to determine dry molecular weight of the gas stream: OK
4. RM 4 used to determine moisture content: OK
5. RM 5 used to determine particulate matter emissions: OK
6. RM 9 used to determine visible emissions opacity: OK
7. RM 202 used to determine condensable particulate matter: OK

DEVIATIONS: None.

CONCLUSION: The protocol appears to be acceptable.

RECOMMENDATION: The methods proposed in the pretest protocol are sufficient to
determine particulate matter emissions from the Hot Mix Asphalt
Plant. It is recommended that the pretest protocol be determined as
acceptable.

ATTACHMENTS: Staker Parson Companies’ Test Notification Letter and Pretest
Protocol
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