DAQ-2024-011884

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-1177-24
Site ID 12524 (B5)

Matt Briggs
Plant Manager, Currant Creek Plant
PacifiCorp
1407 West North Temple
Salt Lake City, Utah 84116

Dear Mr. Briggs:

Re: PacifiCorp (Currant Creek Plant) – Pretest Protocol for Carbon Monoxide (CO), Nitrogen
Oxides (NOx), and Oxygen (O2) Relative Accuracy Test – Juab County

The Utah Division of Air Quality (DAQ) reviewed Currant Creek Plant’s pretest protocol dated
November 13, 2024. The proposed test shall be performed under the following conditions:

Currant Creek Plant’s monitoring system to be certified:

Source Channel Manufacturer Model # Monitor SN
CTG1A
CO Thermo 48iQ ---
NOx Thermo 42iQ 111
O2 Thermo 48iQ 112
CTG1B
CO Thermo 48iQ ---
NOx Thermo 42iQ 211
O2 Thermo 48iQ 212

Montrose Air Quality Services, LLC will conduct a relative accuracy/performance specification
test on Currant Creek Plant’s continuous monitoring system.

Relative accuracy must be determined in the units of the emission standard or equivalent units of
the emission standard, i.e., tons/year shall be tested in pounds/hour.

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DAQC-1177-24
Page 2

The DAQ understands that the testing contractor staff will conduct testing as follows:

Test Date Point Source Parameter EPA Reference Method
January 7, 2025 CTG1A CO, NOx, and O2 Method 3A, 7E, 10, and 19 January 8, 2025 CTG1B

• Reference Method 3A - Determination of Oxygen and Carbon Dioxide
Concentrations in Emissions from Stationary Point Sources – (Instrumental
Analyzer Procedure) as outlined in 40 CFR 60 Appendix A.

• Reference Method 7E - Determination of Nitrogen Oxide Emissions from
Stationary Point Sources - (Instrumental Analyzer Procedure) as outlined in 40
CFR 60 Appendix A.

• Reference Method 10 - Determination of Carbon Monoxide Emissions from
Stationary Point Sources – (NDIR Instrumental Procedure) as outlined in 40 CFR
60 Appendix A.

• Reference Method 19 - Determination of Sulfur Dioxide Removal Efficiency and
Particulate Matter, Sulfur Dioxide, and Nitrogen Oxides Emission Rates as
outlined in 40 CFR 60 Appendix A.

• Deviations - The Director or the representative of the Director must be notified of
and approve deviations of the Reference Method test. Any deviation from these
conditions without approval from the DAQ may constitute rejection of these tests.

Acceptance of a protocol does not relieve the owner/operator and the testing
contractor from strict adherence to all applicable EPA methods, DAQ policies,
Utah Air Quality Rules (UAQR), and methods approved by the Director. Any
deviation from EPA methods, DAQ policies, UAQR, and methods approved by the
Director must be addressed separately and express written consent given prior to
commencement of testing.

• Field data (Point Source emission data and test data) shall be turned over to the
DAQ in a timely manner for review.

• The Director will determine the relative accuracy of each monitoring system based
on Point Source continuous emission monitoring data and test data acquired by the
staff member of the DAQ during the test.

• All test reports must be submitted to the Director not later than 60 days after
completion of the test.

• The test report shall include all raw calibration data, raw emission data with date,
time stamps.
DAQC-1177-24
Page 3

Relative accuracy test reports must contain:

1. Point source continuous monitor, channel, manufacturer, and serial number,

2. Raw stack test data and continuous monitor data with date and time stamps.

3. Emission data reported in concentration (ppm or %) and units in the applicable
emission limit.

The DAQ requires that all test reports include a statement signed by a responsible official
certifying that:

1. Testing was conducted while the Point Source was operating at the rate and/or
conditions specified in the applicable approval order, operating permit, or federal
regulation.

2. During testing, the Point Source combusted fuels, used raw materials, and
maintained process conditions representative of normal operations, and operated
under such other relevant conditions specified by the director.

3. Based on information and belief formed after reasonable inquiry, the statements
and information contained in the report are true, accurate, and complete.

Should you have any questions concerning this matter, contact me at [phone] or by email
at [e-mail].

Sincerely,

Paul Morris, Environmental Scientist
Major Source Compliance Section

PM:rh

cc: Central Utah Public Health Department
Mostardi Platt, LLC
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Paul Morris