DAQ-2025-001070

1

DAQC-168-25
Site ID 16085 (B4)
MEMORANDUM

TO: STACK TEST FILE – DESERET POWER ELECTRIC COOPERATIVE –
Ft. Pierce Power Plant – Washington County

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

FROM: Kyle Greenberg, Environmental Scientist

DATE: February 12, 2025

SUBJECT: Source: Six (6) Natural Gas Engines (G3520H Caterpillar)
Location: 4570 South River Road, St. George, UT 84790
Contact: Tyler Esplin: 435-781-5706
Tester: Montrose Air Quality Services, LLC
Permit/AO #: DAQE-AN160850001-22, dated April 18, 2022
Subject: Review of Pretest Protocol dated February 6, 2025

On February 10, 2025, DAQ received a protocol for the testing of Six (6) Natural Gas Engines (G3520H
Caterpillar) at the Ft. Pierce Power Plant in Washington County, UT. Testing will be performed
November 4, 2025, through November 6, 2025, to determine compliance with the emission limits found
in condition II.B.2.a of Approval Order DAQE-AN160850001-22 and 40 CFR Part 60 Subpart JJJJ.

PROTOCOL CONDITIONS:
1. RM 1 used to determine sample velocity traverses: OK
2. RM 2 used to determine effluent gas velocity: OK
3. RM 3A used to determine O2 and CO2 concentrations: OK
4. RM 4 used to determine moisture content: OK
5. RM 7E used to determine NOx emissions: OK
6. RM 9 used to determine VEO: OK
7. RM 10 used to determine CO emissions: OK
8. RM 25A used to determine VOC emissions: OK

DEVIATIONS: None.

CONCLUSION: The protocol appears to be acceptable to determine the emission
concentration and rates for CO, NOx, and VOC.

RECOMMENDATION: It is recommended the protocol be determined as acceptable.

ATTACHMENTS: Deseret Power Electric Cooperative’s Pretest Protocol and Test
Notification.
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