DAQ-2024-007991

1

DAQC-433-24
Site ID 15852 (B4)
MEMORANDUM

TO: STACK TEST FILE – KILGORE COMPANIES, LLC – Benjamin Aggregate and
Asphalt Plant – Utah County

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

FROM: Kyle Greenberg, Environmental Scientist

DATE: May 5, 2024

SUBJECT: Source: Astec PBH-56-17.5 Hot Mix Asphalt Plant
Location: 7200 South 5600 West, Benjamin, UT 84660
Contact: Lee Ware: 801-831-7402
Tester: Montrose Air Quality Services, LLC
Site ID #: 15852
Permit/AO #: DAQE-AN158520002-24 dated February 14, 2024
Subject: Review of Pretest Protocol dated May 2, 2024

On May 3, 2024, DAQ received a protocol for testing of Astec PBH-56-17.5 Hot Mix Asphalt Plant
equipment and Baghouse at Benjamin Aggregate and Asphalt Plant in Utah county. Testing will be
performed on June 4, 2024, to determine compliance with the emission limits found in condition II.B.5 in
Approval Order DAQE-AN158520002-24.

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 and visible emissions
from the Hot Mix Asphalt equipment and Baghouse. It is
recommended that the pretest protocol be determined as
acceptable.

ATTACHMENTS: Kilgore Company’s Test Notification Letter and Pretest Protocol