DAQ-2024-010468

1

DAQC-957-24
Site ID 12103 (B4)

MEMORANDUM

TO: STACK TEST FILE – MOUNTAINWEST PIPELINE, LLC – Oak Spring Turbine
Compressor Station

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

FROM: Paul Bushman, Environmental Scientist

DATE: September 24, 2024

SUBJECT: Source: Solar Taurus 60-7800S Turbine; Unit ID: Turbine T-3
Location: 6.5 miles west of Spring Glen remote site in Carbon County
Contact: Dani Baldwin: 801-201-2595
Tester: Oasis Emission Consultants, Inc.
Site ID #: 12103
Permit/AO #: DAQE-AN121030019-20, dated July 14, 2020
Subject: Review of Pretest Protocol dated September 23, 2024

On September 23, 2024, Utah Division of Air Quality (DAQ) received a protocol for testing of Turbine
T-3 at MountainWest Pipeline, LLC Oak Spring Turbine Compressor Station in Carbon County, Utah.
Testing will be performed on November 12, 2024, to determine compliance with the emission limits
found in condition II.B.2 of DAQE-AN121030019-20 and 40 CFR Part 60, Subpart GG.

PROTOCOL CONDITIONS:

1. RM 1 used to determine sample velocity traverses: OK
2. RM 3A used to determine O2 and CO2 concentrations: OK
3. RM 7E used to determine NOx emissions: OK
4. RM 10 used to determine CO emissions: OK
5. RM 19 used to determine the exhaust effluent flow: OK
6. RM 20 used to determine emissions from stationary combustion turbines: OK

DEVIATIONS: None.

CONCLUSION: The protocol appears to be acceptable.

RECOMMENDATION: Send protocol review and test date confirmation notice.

ATTACHMENTS: MountainWest Pipeline, LLC test notification letter and pretest protocol.
Via Electronic

September 23, 2024

Utah Division of Air Quality
Attn: Director, NSR Section
P.O. Box 144820
Salt Lake City, UT 84114-4820

RE: MountainWest Pipeline, LLC
Oak Spring Turbine Compressor Station
Approval Order DAQE-AN121030019-20
Performance Test Notification for T-3

Dear Mr. Bird:

The purpose of this correspondence is to provide notification that Oak Spring Turbine
Compressor Station will be conducting a performance test on the Solar Taurus 60-7800S turbine,
T-3. The turbine will be tested for nitrogen oxides (NOX) and carbon monoxide (CO) emissions in
accordance with the Approval Order Number DAQE-AN121030019-20, Condition II.B.2.a. The
performance test is scheduled for November 12, 2024, between the hours of 7:00 A.M. and 7:00
P.M. However, in the event of unforeseen circumstances, or as operational conditions dictate,
testing may extend past 7:00 P.M. The performance test protocol is enclosed for your review.

Questions regarding this submittal should be referred to Dani Baldwin at [phone] or
[e-mail].

Sincerely,

Dani Baldwin
Environmental Specialist

Enclosure
MountainWest Pipeline, LLC
P.O. Box 45922
Salt Lake City, Utah 84145

Utah Department of Environmental Quality
Division of Air Quality
Source Test Protocol

Approval Order # DAQE-AN121030019-20
& EPA 40 CFR 60 (NSPS), Subpart GG

Turbine: Solar Taurus 60-7800S
Permit ID: T-3
Unit ID: #3

MountainWest Pipeline, LLC
Oak Spring Turbine Compressor Station,
Carbon County, Utah

September 23, 2024

Prepared By:

Oasis Emission Consultants, Inc.
2730 Commercial Way
Rock Springs, WY 82901

CERTIFICATION STATEMENT
This statement certifies that “to the best of their knowledge,” based on State and Federal
regulations, operating permits, plan approvals applicable to each source or control device to be
tested, and reasonable inquiry, the statements and information presented in the attached
document are true, accurate, and complete. If the information herein is found to be inaccurate or
incomplete by any participant, the protocol will be reviewed and all reasonable measures will be
taken to make necessary changes.
SOLAR TAURUS 60-7800S
PERMIT ID: T-3 / UNIT ID: #3
COMPLIANCE TEST PROTOCOL
MOUNTAINWEST PIPELINE, LLC
OAK SPRING TURBINE COMPRESSOR STATION / CARBON COUNTY / UTAH

Name: Shawna O’Brien______ Date: September 23rd, 2024
Title: Sr. Environmental Scientist Company: Oasis Emission Consultants, Inc.
Signature:

________________________________________________ __________________
Dani Baldwin Date
Environmental Specialist
MountainWest Pipeline, LLC

9/23/2024
1

TABLE OF CONTENTS

1.0 Introduction........................................................................................................................................2
1.1 Test Program Organization.......................................................................................................2
1.2 Test Project Objective(s)...........................................................................................................4
1.3 Facility Description..................................................................................................................5
2.0 Source Test Program Description.......................................................................................................5
2.1 Test Contractor........................................................................................................................5
2.2 Test Date.................................................................................................................................5
2.3 Time........................................................................................................................................5
2.4 Report Date.............................................................................................................................5
2.5 Test Report Format..................................................................................................................6
3.0 Testing Methodology and Procedures................................................................................................7
3.1 Permitted Limits and Standards................................................................................................7
3.1.1 UDEQ AO # DAQE-AN121030019-20 Limits...........................................................................7
3.1.2 NSPS Subpart GG Standard........................................................................................7
3.2 Sampling Matrix......................................................................................................................7
3.3 Stack Sampling Location..........................................................................................................8
3.4 Emission Measurement Methodologies.......................................................................................9
3.4.1 Method 19 Fd Factor...............................................................................................12
3.5 Equipment Utilization.............................................................................................................12
3.6 Test Quality Assurance Procedures..........................................................................................12
3.6.1 Sampling Protocol...................................................................................................12
3.6.2 Equipment Calibration and Measurement....................................................................13
3.7 Turbine Load Approximation.................................................................................................13
3.8 Test Methods.........................................................................................................................13

List of Figures and Tables

Table 1 – Report Contents................................................................................................................................6
Table 2 – Source Summary and Permitted Limitations....................................................................................7
Table 3 – NSPS Subpart GG NOx Standard.....................................................................................................7
Table 4 – Sampling Matrix...............................................................................................................................7
Figure 1 – Sample Location Diagram...............................................................................................................9
Figure 2 – EPA Method 3A, 7E and 10 Sampling Train Schematic..............................................................11

Appendices

APPENDIX A: Example Calculations

APPENDIX B: Sample Calibration Sheets

2

1.0 Introduction

The purpose of this document is to provide relevant information pertaining to proposed
emissions testing at MountainWest Pipeline, LLC’s Oak Spring Turbine Compressor Station in
Carbon County, Utah. Emissions testing will be conducted in accordance with the Utah
Department of Environmental Quality (UDEQ) Approval Order # DAQE-AN121030019-20
(Issuance Date: July 14, 2020) and in accordance with EPA 40 CFR 60 (NSPS), Subpart GG.

The emission test is being conducted following a permanent like-kind turbine core replacement
on the Solar Taurus 60-7800S turbine (Permit ID: T-3 or Turbine #3; Unit ID: #3). Testing will
be conducted by Oasis Emission Consultants, Inc.
1.1 Test Program Organization

Approval Order No.: DAQE-AN121030019-20
Federal Regulation: NSPS Subpart GG

Facility / Location: Oak Spring Turbine Compressor Station (Site ID: 12103) The Oak Spring Turbine Compressor Station is located at a remote site approximately 6.5 miles west of Spring Glen in Carbon
County, Utah.
UTM Coordinates: 501,700 m Easting, 4,390,000 m Northing UTM Zone 12
Permit ID: T-3: Natural Gas Turbine Compressor, Solar Taurus 60-7800S
The Oak Spring Compressor Station Unit #3 is identified as T-3
or Turbine #3 in UDEQ Approval Order (AO) # DAQE- AN1210300019-20 Section II.A.4. The turbine is subject to the
requirements of NSPS Subpart GG.

Client Owner / Operator: MountainWest Pipeline, LLC

Address: P.O. Box 45922,
Salt Lake City, UT 84145 Contact: Dani Baldwin, Environmental Specialist
Email: [e-mail]
Cell.: [phone]
Test Company: Oasis Emission Consultants, Inc.

Address: 2730 Commercial Way
Rock Springs, WY 82901
Contact: Chris Knott, P.Eng., Director, Engineering & Operations
Phone: [phone]
Fax: [phone]

3

State Authority: Utah Department Of Environmental Quality

Address: PO Box 144820
Salt Lake City, UT 84114-4820
Contact: Rik Ombach, Minor Source Compliance Manager Email: [e-mail]
Phone: [phone]
Stack Test Report Submission:
https://utahgov.co1.qualtrics.com/jfe/form/SV_3dSxf7JSzy4jwGh

4
1.2 Test Project Objective(s)
The purpose of the emissions compliance demonstration is to satisfy the requirements of
the UDEQ AO # DAQE-AN121030019-20 (Issuance Date: July 14, 2020) and NSPS
Subpart GG.
The Solar Taurus 60-7800S turbine had a permanent like-kind turbine core replacement.
The overhauled turbine is being tested in accordance with the procedures of 40 CFR 60.
In order to demonstrate compliance with NSPS Subpart GG, the turbine will be tested for
nitrogen oxides (NOx) according to EPA Test Methods 1, 3A and 7E. Oxygen will be
measured to allow for NOx emission levels to be corrected to 15% O2.
Additionally, testing will be conducted to demonstrate compliance with UDEQ AO #
DAQE-AN121030019-20 Conditions II.B.2.a., II.B.2.a.1. and II.B.2.a.2. Under the
permit, testing for NOx and carbon monoxide (CO) at full load conditions will be
conducted following EPA Test Methods 1, 3A, 7E, 10 and 19. Testing will comply with
EPA’s Method 20 requirements. EPA Test Method 19 will be used to determine the
volumetric flow rate based on the fuel flow determined by the fuel gas meter and exhaust
O2 concentration.
The Solar Taurus 60-7800S turbine will be tested for NOx for three test runs at three
separate load points, selected from the normal operating range of the turbine, for a total
of nine test runs. Each test run will consist of 21-minute readings. An additional three test
runs will be performed at full load conditions for NOx and CO. Each test run will consist
of 60 readings taken at one minute intervals. The three 21-minute test runs at the high
load conditions for NOx (using Methods 1, 3A and 7E) will be taken from the required
UDEQ permit three, one hour test runs to meet NSPS Subpart GG requirements. Thereby,
a total of twelve test runs will be conducted on the turbine for NOx and a total of three
test runs will be conducted on the turbine for CO. A detailed test procedure is provided in
Section 3.4 of this protocol.
The Solar Taurus 60-7800S turbine has a rated output of 7,684 horsepower (hp) at base
load and a derated load, or site rated load, of 6,082 hp. The percent load during the test
will be calculated based on the derated site horsepower. In accordance with 40 CFR
60.335(b)(2), NOx testing will be conducted at four evenly spaced load points in the
normal operating range of the turbine, including the minimum point and the 90-to-100
percent peak load. If 90-to-100 percent peak load is not achievable in practice, testing
will be conducted at the highest achievable load point. The turbine has a rated heat rate of
8,038 Btu/hp-hr at site rating.
Process parameters expected to be collected during the performance testing include, but
are not limited to: atmospheric pressure, atmospheric temperature, fuel flow, humidity and O2%. Turbine operating parameters (e.g. horsepower, %NGP and T-5) will be
monitored during the test period and recorded on the turbine test sheets and included in
the test report.
5
1.3 Facility Description
MountainWest Pipeline, LLC operates the Oak Spring Turbine Compressor Station
located approximately 6.5 miles west of Spring Glen in Carbon County, Utah. The Oak
Spring Turbine Compressor Station consists of three turbine compressor engines and one
backup generator. The facility is classified as a minor source.
The compliance emission test will be conducted on the natural gas fired Solar Taurus
60-7800S turbine identified as T-3 or Turbine #3 in DAQE-AN121030019-20, Section
II.A.4.
2.0 Source Test Program Description
2.1 Test Contractor
All source emission tests will be performed by Oasis Emission Consultants, Inc., based
out of Rock Springs and Sheridan, Wyoming. Processed test results and all raw data
captured during the tests are forwarded to Chris Knott, P.Eng., Director of Engineering
and Operations and/or Charles Chapman, Manager of Technical Services, for quality
control and data checking. Once approved, tests are forwarded to the client.
2.2 Test Date
Emissions testing is currently scheduled to be conducted and completed on November 12,
2024.
2.3 Time
Testing is currently scheduled to be conducted between the hours of 7:00 A.M. and 7:00
P.M. However, in the event of unforeseen circumstances, or as operational conditions
dictate, testing may extend past 7:00 P.M.
2.4 Report Date
The compliance test report will be submitted to the UDEQ no later than 60 days following
the compliance test.
6

2.5 Test Report Format

The following table illustrates the format used for reports submitted.

Table 1: Report Contents.
Content Description
Cover The cover will contain the air testing
company information, facility name and
source summary.
Introduction The introduction will include the test
objective and descriptions of the source
and control equipment (as applicable).
Stack Sampling Location The stack sampling location details the
sampling site location.
Discussion of Test Results The test results provide the results for each
test run.
Stack Sampling Methods and Procedures The stack sampling methods and
procedures will include a detailed
description of the methods utilized in the
testing process and any deviations from the
submitted protocol.
Equipment Utilization The equipment utilization provides a list of
the test equipment employed in conjunction
with the sampling test methods.
Process Parameters Process parameters summarizes the source
parameters recorded during the test runs.
Quality Assurances Quality assurance and quality control
procedures pertaining to the methods and
equipment calibrations will be included in
the emission source test report.
Appendices The report’s appendices will contain test
data, quality assurance/calibration data, Fd
factor determination, example equations
and field notes.

7

3.0 Testing Methodology and Procedures
3.1 Permitted Limits and Standards

The purpose of the compliance test on the Solar Taurus 60-7800S turbine is to
demonstrate compliance for NOx and CO permit limits and the NSPS Subpart GG
standard for NOx. The permitted limits and Subpart GG standard are provided in the
following tables.
3.1.1 UDEQ AO # DAQE-AN121030019-20 Limits

Table 2: Source Summary and Permitted Limitations.
*The rated output is derived from UDEQ AO # DAQE-AN121030019-20. The permitted “base load” is the
sea level performance for the Solar Taurus 60-7800S turbine. The “derated output” is the site rated load and
is determined based on the altitude and site conditions. Therefore, this is the approved rating for the turbine
load. The percent load during the test will be calculated based on the derated site horsepower. Oasis
Emission Consultants, Inc. will approximate the turbine load using process parameters measured, such as
gas throughput, suction/discharge pressure/temperature, manufacturer’s BSFC, panel reading or fuel
measurement (if available).
**The serial number will be provided in the test report, if currently unavailable.
3.1.2 NSPS Subpart GG Standard

Table 3: NSPS Subpart GG NOx Standard.

3.2 Sampling Matrix

Table 4: Sampling Matrix.
Method Title Parameter Reference Number of
Tests
EPA 40 CFR 60
Appendix A,
Method 1
Sample and Velocity Traverses
for Stationary Sources
Sampling Point
Determination
https://www.epa.gov/syst
em/files/documents/2023-
09/2023%20Final%20MS
%20%20Method%201_0.
pdf

EPA 40 CFR 60
Appendix A,
Method 3A
Determination of Oxygen and
Carbon Dioxide Concentrations
in Emissions From Stationary
Sources (Instrumental Analyzer
Procedure)
O2 https://www.epa.gov/sites
/default/files/2017-
08/documents/method_3a
.pdf

Permit ID Unit ID Source Rated Output* Permit NOx Permit CO
T-3
(Turbine #3)
Unit #3 Solar Taurus
60-7800S
turbine
7,684 hp @ base load
(6,082 hp derated)
8.70 lb/hr, 42 ppmvd
@ 15% O2
6.30 lb/hr
Permit ID Unit ID Source EPA Standard
NOx
T-3 (Turbine #3) Unit #3 Solar Taurus
60-7800S
turbine
42 ppmvd @ 15% O2
8
EPA 40 CFR 60
Appendix A,
Method 7E
Determination of Nitrogen Oxides
Emissions From
Stationary Sources (Instrumental
Analyzer Procedure)
NOx https://www.epa.gov/sites
/default/files/2020-
12/documents/method_7e
_2.pdf
9 x 21 minutes
and 3 x 1 hr
EPA 40 CFR 60
Appendix A,
Method 10
Determination Of Carbon
Monoxide Emissions From
Stationary Sources
(Instrumental Analyzer
Procedure)
CO https://www.epa.gov/sites
/default/files/2017-
08/documents/method_10
.pdf
3 x 1 hr
EPA 40 CFR 60
Appendix A,
Method 19
Determination of Sulfur Dioxide
Removal Efficiency and
Particulate Matter, Sulfur
Dioxide and Nitrogen Oxide
Emission Rates
Exhaust effluent
flow- mass
emission rates will
be calculated
using Method 19
and the fuel
consumption
recorded during
the tests
https://www.epa.gov/sites
/default/files/2017-
08/documents/method_19
.pdf
3 x 1 hr
EPA 40 CFR 60
Appendix A,
Method 20
Determination of Nitrogen
Oxides, Sulfur Dioxide, and
Diluent Emissions From
Stationary Gas Turbines
NOx https://www.epa.gov/sites
/default/files/2017-
08/documents/method_20
.pdf
EPA 40 CFR 60
Subpart GG
§60.335
Subpart GG Standards of
Performance for Stationary
Combustion Turbines
NOx https://www.ecfr.gov/curr
ent/title-40/chapter-
I/subchapter-C/part-
60/subpart-GG
U.S. Environmental Protection Agency. “EMC Promulgated Test Methods.” Air Emission
Measurement Center (EMC). 9 July 2024. Web. 23 September 2024. <https://www.epa.gov/
emc/emc-promulgated-test-methods>.
U.S. Environmental Protection Agency. “Subpart GG–Standards of Performance for Stationary
Combustion Turbines.” Title 40: Protection of Environment. Part 60 –Standards of
Performance for New Stationary Sources (Continued). Title 40. Chapter 1. Subchapter C. Part
60. Subpart GG. 40 CFR 60, 2019. Washington: GPO. 19 September 2024. Web. 23 September
2024.
<https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-60/subpart-GG >.
3.3 Stack Sampling Location
The inner exhaust stack diameter for the Solar Taurus 60-7800S (Permit ID T-3, Unit
ID: #3) was previously measured as 36 inches. The sampling ports for flow, NOx and
CO measurements is approximately 5.0 pipe diameters downstream from the nearest
flow disturbance and 1.0 pipe diameters upstream from the nearest disturbance. The test
location will be verified during the test program to meet the minimum specifications of
a sampling location as defined by EPA Method 1. An aerial lift will be utilized, if
needed, to conduct sampling.
9
Figure 1: Sample Location Diagram.
3.4 Emission Measurement Methodologies
Testing will be performed and calculated in accordance with EPA Test Methods 1, 3A,
7E and 20 for NOx for the nine 21-minute test runs at evenly spaced load conditions
according to the requirements of NSPS Subpart GG. Oxygen will be measured to allow
for emission levels to be corrected to 15% O2.
In order to comply with the DAQE-AN121030019-20 requirements, testing at full load
conditions will be conducted for three, one hour test runs for NOx and CO. Testing will
be performed in accordance with EPA’s Methods 1, 3A, 7E, 10, 19 and 20. The step-by-
step example calculations are provided in Appendix A.
Testing will be conducted for three runs at four evenly spaced loads as required by NSPS
Subpart GG. The proposed procedural guideline is provided below:
1) Linearity checks of O2, CO and NOx analyzers according to EPA Test Methods
3A, 7E and 10.
2)(NSPS Subpart GG Requirement) O2 stratification check will be conducted to
determine the point at which the effluent gas is to be sampled on all tests.
3) Measurement of relative humidity (wet/dry bulb), barometric pressure and
ambient temperature at the test site.
4)(UDEQ Compliance Requirement) Three, one hour tests at full load conditions
according to EPA Test Methods 1, 3A, 7E, 10, 19 and 20. Oxygen will be
measured to allow for NOx emission levels to be corrected to 15% O2. Sample
bias checks will be conducted before/after each 1 hour test run. (NSPS Subpart
GG Requirement) Three, 21-minute test runs at three, evenly spaced load
conditions for NOx on a ppmvd @ 15% O2 basis, for a total of nine test runs
according to Subpart GG requirements. Three equally spaced load points will be
10

selected near the normal operating range of the turbine, with the lowest attainable
load to be tested last. Additionally, the three high load 21-minute test runs for
NOx will be taken from the three, one hour UDEQ compliance test runs to meet
the Subpart GG requirements. A total of twelve test runs will be conducted to
meet NSPS Subpart GG requirements.

The schematic for our sampling system is shown on the following page.

11

Figure 2: EPA Methods 3A, 7E and 10 Sampling Train Schematic.

12

3.4.1 Method 19 Fd Factor

Exhaust effluent flow during testing is determined using EPA’s Method 19. Method 19
establishes appropriate F factors. An F factor is the ratio of the combustion gas volume to
the heat content of the fuel. The dry F factor (Fd) includes all components of combustion
less water.

The emissions in terms of lb/hr will be calculated using EPA’s Method 19 and the fuel
consumption recorded during testing. The fuel consumption and the site fuel analysis will
be provided in the test report.

3.5 Equipment Utilization

Oasis Emission Consultants Inc. will utilize the following gas analyzers and associated
equipment for this testing:

 API 300M CO NDIR Analyzer
 API 200AH NOx/O2 Chemiluminescent/Paramagnetic Analyzer
 75 ft. Heated Sample Line
 Fyrite Analyzer for Carbon Dioxide Measurement
 Universal Analyzer 3040SSP Sample Gas Conditioner
 EPA G1 Protocol Calibration Gas
 Laptop Computer To Download Raw Analyzer Data

3.6 Test Quality Assurance Procedures

3.6.1 Sampling Protocol

Precautions are taken to keep the gas analyzer in a clean, thermally stable, vibration free
environment to minimize analyzer drift and associated errors. Pre test calibrations and post test operations are performed within the testing trailer environment.
Samples are taken according to EPA Methods 1, 3A, 7E, 10, 19, 20 and applicable
Subpart GG procedures. The data from the samples are converted directly into computer
language and recorded in the Compliance Specialist’s laptop computer. This eliminates the need for sample labeling and secures the preservation of the data while reducing
human error. In addition, parameters associated with the turbine are recorded on test
sheets at the time of the test.
Linearity checks are perform using certified calibration gases to ensure that the zero, mid,
and upscale calibrations are within the certified calibration level and zero. Pre-test calibrations are then conducted on the zero and selected mid or upscale calibration gas
determined by observing the native concentration of the target analytes in the sampled. exhaust. After each test run the same zero and selected mid or upscale calibration gas are
analyzed to verify they are within the required specifications.

13

3.6.2 Equipment Calibration and Measurement

Preventive diagnostic functions are built directly into the equipment utilized for the
testing. This diagnostic function provides the Compliance Specialist with failure
warnings allowing the determination of when repairs are necessary without performing
painstaking preventative maintenance procedures. However, equipment is inspected
regularly by the Compliance Specialists to guarantee maximum operational status. The
process involved with equipment calibration ensures that there is no divergence from the
manufacturer’s specifications.

3.7 Turbine Load Approximation

Oasis Emission Consultants Inc. will approximate the turbine load using process
parameters measured, such as gas throughput, suction/discharge pressure/temperature,
manufacturer’s BSFC, panel reading or fuel measurement (if available).

In accordance with 40 CFR 60.335(b)(2), NOx testing will be conducted at four evenly
spaced load points in the normal operating range of the turbine, including the minimum
point and the 90-to-100 percent peak load. If 90-to-100 percent peak load is not
achievable in practice, testing will be conducted at the highest achievable load point.

3.8 Test Methods

Oasis Emission Consultants, Inc. will employ EPA 40 CFR 60 (A) methods as required
by UDEQ AO # DAQE-AN121030019-20 and in accordance with 40 CFR 60.335
(Subpart GG). These methods are described below.

 EPA 40 CFR 60 Appendix A, Method 1: Method 1 requires measurement of the
various physical attributes of a stack to establish appropriate sampling locations.
 EPA 40 CFR 60 Appendix A, Method 3A: O2 measurements will be conducted using
an instrumental analyzer according to Method 3A. The O2 levels will be used in
conjunction with Method 19 to determine the overall exhaust effluent flow. The O2
levels will also be used to allow for the correction of NOx to ppmvd @ 15% O2.
 EPA 40 CFR 60 Appendix A, Method 7E: Method 7E is the instrumental method for
measuring the NOx concentration in the effluent stream. After passing through a sample
conditioning system, NOx concentration is measured by a chemiluminescent gas
analyzer. The analyzer is calibrated using EPA Protocol G1 gas before and after each
one hour test run.
 EPA 40 CFR 60 Appendix A, Method 10: Method 10 is the instrumental method for
measuring the CO concentration in the effluent stream. After passing through a sample
conditioning system, CO concentration is measured by an NDIR gas analyzer. The
analyzer is calibrated using EPA Protocol G1 gas before and after each one hour test
run.
 EPA 40 CFR 60 Appendix A, Method 20: Method 20 is the instrumental method for
measuring NOx and/or O2 concentrations from stationary gas turbines. NOx and O2 are
14

measured using Method 7E and 3A, respectively, for a duration of at least 21-minutes
per test run.
 EPA 40 CFR 60 Appendix A, Method 19: Method 19 utilizes a fuel metering system
to measure the fuel flow consumed by the turbine. This data is correlated with the fuel
gas composition and the measured exhaust gas Oxygen content, to arrive at the overall
exhaust effluent flow.
 EPA 40 CFR 60 Subpart GG § 60.335: Subpart GG regulates the NOx and Sulfur
Dioxide (SO2) pollutants. NOx will be measured using Method 7E or Method 20. A
stratification check will be performed prior to testing to determine sampling location
according to 40 CFR 60.335(a)(5)(i)(B).

APPENDIX A

Example Calculations:

The following is a step-by-step example of the calculations that will be utilized for each test run.

Test Parameters
 Average O2  Turbine Load

EPA Method 19: Determination of Stack Gas Flow Rate
Volumetric Flow Rate At Outlet (dscfm) = q * Fd * 1E-6 * HHV * 20.9 / (20.9 – O2)

Where:
q – Fuel flow (scf/min)
Fd – Fuel factor, dry (dscf/mmBtu)
HHV – Higher heating value of fuel (Btu/scf)
O2 – Oxygen content in exhaust (%)
1E-6 – Conversion from Btu to mmBtu

EPA Method 7E & 10: Determination of NOx and CO Emissions From Stationary Sources

Corrected Flue Gas Concentration (PPM) = (CR - CO) * CMa / (CM – CO)
Where:
CR – Average flue gas concentration indicated by gas analyzer (ppm) CO – Average of initial and final zero system bias checks (ppm)
CM – Average of initial and final span system bias checks (ppm)
CMa – Actual concentration of span gas (ppm)

Method 7E: NOx Emission Rate (lb/hr) = PPMO * MW * QO * 60 / (385.3 * 1000000)

Where:
NOx – Nitrogen Oxides PPMO – Average concentration of corrected pollutant at outlet (ppm)
QO – Volumetric flow rate at outlet (dscfm)
MW – Molecular Weight 60 – Conversion factor (minutes per hour)
385.3 – Volume occupied by one pound of gas at standard conditions (dscf/lb-mole)
1000000 – Conversion factor (ppm to mole fraction)

NOx Correction to 15% O2 = PPMO * (20.9 – 15) / *(20.9 – O2%)
Where:
NOx – Nitrogen Oxides PPMO – Average Concentration Of Corrected Pollutant At Outlet
O2 – Oxygen Concentration in Exhaust Stream (%)

NOx Correction to ISO Standard Conditions = (NOxO)(Pr / PO)0.5 e19 * (HO – 0.00633) (288K / Ta)1.53

Where: NOxO – Nitrogen Oxides Concentration @ 15% O2
Pr – Reference Absolute Pressure at 101.3 Kilopascals Ambient Pressure PO – Observed Absolute Pressure At Test
HO – Observed Humidity Of Ambient Air, gH2O/g air
e – Transcendental Constant, 2.718
Ta – Ambient Temperature, K

Method 10: CO Emission Rate (lb/hr) = PPMO * MW * QO * 60 / (385.3 * 1000000)
Where:
CO – Carbon Monoxide PPMO – Average concentration of corrected pollutant at outlet (ppm)
QO – Volumetric flow rate at outlet (dscfm)
MW – Molecular Weight 60 – Conversion factor (minutes per hour)
385.3 – Volume occupied by one pound of gas at standard conditions (dscf/lb-mole)
1000000 – Conversion factor (ppm to mole fraction)

APPENDIX B

SAMPLE
SAMPLE
Airgas
an Air Liquide company
Part Number:
Cylinder Number:
Laboratory:
pc;vp Number:
Gas Code:
Airgas Specialty Gases
Airgas USA LLC
525 North Industrial Loop Road
Tooele,UT 84074
Airgas.com
CERTIFICATE OF ANALYSIS
Grade of Product:EPA PROTOCOL STANDARD
E02N199E15A0497
CC93412
124 -Tooele (SAP)-UT
B72023
CO,BALN
Reference Number:
Cylinder Volume:
Cylinder Pressure:
Valve Outlet:
Certification Date:
153-402750636-1
144.0 CF
2015 PSIG
350
May 22,2023
Expiration Date:Ma 22 2031
Certificationperformed in accordance with "EPA Traceability Protocol for Assay and Certificationof Gaseous Calibration Standards (May 2012)"documentEPA
600/R-12/531,using the assay procedures listed.Analytical Methodology does not require correction for analytical interference,This cylinder has a total analytical
uncertainty as stated below with a confidencelevel of 95%.There are no significantimpurities which affect the use of this calibrationmixture.All concentrations are on a
mole/mole basis unless otherwise noted.The results relate only to the iterns tested. The report shall not be reproduced exceptin full without approval of the laboratory.Do
Not Use This Cylinder below 100 psig, i.e.0.7 megapascals.
ANALYTICAL RESULTS
Component
CARBON MONOXIDE
RequestedConcentration
30.00 PPM
Balance
Cylinder No
CC714889
19060528
Actual
Concentration
29.94 PPM
Protocol
Method
Gl
NITROGEN
Type
NTRM
NTRM
Lot ID
20060920
190605
CALIBRATION STANDARDS
Concentration
26.54 PPM CARBON MONOXIDE-INITROGEN
495.2 PPM SULFUR DIOXIDE/NITROGEN
Total Relative
Uncertainty
+/-0.5%NIST Traceable
Uncertainty
0.4%
0.5%
AssayDates
05/22/2023
Expiration Date
Jun 28,2027
Aug 02,2025
The SRM,NTRM,PRM,or RGM noted above is only in reference to the GMIS used in the assay and not part of the analysis.
ANALYTICAL EQUIPMENT
Instrument/Make/ModeI
Thermo 48i-TLE 1163640031 CO
Triad Data Available Upon Request
Approve
Analytical Principle
CO NDIR (Mason)
for Rele se
Last Multipoint Calibration
Apr 26,2023
11
Page 1 of 1
SAMPLE
SAMPLE
Airgas
an Air Liquide company
Part Number:
Cylinder Number:
Laboratory
PGVP Number:
Gas Code:
Airgas Specialty Gases
Airgas USA LLC
525 North Industrial Loop Road
Tooele,UT 84074
Airgas.com
CERTIFICATE OF ANALYSIS
Grade of Product:EPA PROTOCOL STANDARD
E03N180E15A0138
CC349454
124 -Tooele (SAP)-UT
B72022
Reference Number:
Cylinder Volume:
Cylinder Pressure:
Valve Outlet:
Certification Date:
153-402554387-1
141.0 CF
2015 PSIG
590
sep 27,2022
Expiration Date:Se 27 2030
Certificationperformed in accordance with 'EPA Traceability Protocol for Assay and Certificationof Gaseous Calibration Standards (May 2012)"document EPA
600/R-12/531,using the assay procedures listed.Analytical Methodology does not require correction for analytical interference.This cylinder has a total analytical
uncertainty as stated below with a confidence level of 95%.There are no significantimpurities Which affect the use Of this calibration mixture.All concentrations are on amole/mole basis unless otherwise noted.
Do Not Use This C linder below 100 si ,i.e.0.7 me a ascaiS.
ANALYTICAL RESULTS
Component
CARBON DIOXIDE
OXYGEN
NITROGEN
RequestedConcentration
10.00 %
10.00 %
Balance
Cylinder No
CC411744
SG9161286BAL
ActualConcentration
9.924 %10.09 %
ProtocolMethod
Gl
Type
NTRM
NTRM
Lot ID
13060405
98051010
CALIBRATION STANDARDS
Concentration
7.489 %CARBON DIOXIDE-INITROGEN
12.05 %OXYGEN/NITROGEN
ANALYTICAL EQUIPMENT
Analytical Principle
C02 NDIR (Dixon)
02 Paramagnetic (Mason)
Total Relative
Uncertainty
+1-1.2%NIST Traceable
+1-0.7%NIST Traceable
Uncertainty
0.6%
0.7%
AssayDates
09/27/2022
09/27/2022
Expiration Date
May 14,2025
Dec 14,2023
Instrument/Make/ModeI
Horiba VIA-510 SV4MEUTJ C02
Horiba MPA-510 W603MM58 02
Triad Data Available Upon Request
Last Multipoint Calibration
sep 14,2022
Sep 14,2022
Approved for Relea Page 1 of •i
SAMPLE
SAMPLE
SAMPLE