DAQ-2025-002507

1

DAQC-470-25
Site ID 10355 (B5)

MEMORANDUM

TO: FILE – PACIFICORP – Gadsby Power Plant

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Rob Leishman, Environmental Scientist

DATE: May 15, 2025

SUBJECT: Gadsby Power Plant (Gadsby), Major, SIP, Salt Lake County,
FRS # UT00000049003500068
INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: May 15, 2025

SOURCE LOCATION: Salt Lake City/Salt Lake County

SOURCE CONTACT: Bill Kennick – 801-220-7702
Leah Tiberius – 801-220-7708

APPLICABLE
REGULATIONS: Title V Operating Permit
Permit Number: 3500068006
Date of Permit: January 30, 2024
Date of Last Revision: January 30, 2024

SOURCE INSPECTION
EVALUATION: With the exception of sources that only monitor for opacity, quarterly
report memoranda will only address the findings of the quarterly report.
Approval Order and Title V permit conditions addressing continuous
emission monitoring requirements will be addressed in the relative
accuracy performance specification test review memorandum.

SYSTEM EVALUATION:

First Quarter 2025
% Monitor Availability (MA) Performance Test Dates
(N/A to Opacity)
Summary of Excess Emissions During Point
Source Operation
Point
Source
Op.
hrs. Channel MA CGA Lin RATA Point
Source Channel Hrs. Limitation
1 640 NOx 98% 01/23/25 08/26/24 1 NOx 0.00 179 lb/hr - 3
hour rolling avg.
1 640 CO2 98% 01/23/25 1 NOx 0.00
336 ppmdv, 3%
O2 dry - 3 hour
rolling avg.

1 8 2
2

First Quarter 2025
% Monitor Availability (MA) Performance Test Dates
(N/A to Opacity)
Summary of Excess Emissions During Point
Source Operation
Point
Source
Op.
hrs. Channel MA CGA Lin RATA Point
Source Channel Hrs. Limitation
2 870 NOx 100% 01/21/25 08/26/24 2 NOx 0.00 204 lb/hr - 3
hour rolling avg.
2 870 CO2 100% 01/21/25 2 NOx 0.00
336 ppmdv, 3%
O2 dry - 3 hour
rolling avg.
3 984 NOx 100% 01/21/25 08/27/24 3 NOx 0.00
142 lb/hr, Nov.
1-Feb. 28(29) -
3 hour rolling
avg.
3 984 CO2 100% 01/21/25 3 NOx 0.00
203 lb/hr, Mar.
1-Oct. 31 - 3
hour rolling avg.
4 27 NOx 91% 01/22/25 08/28/24 3 NOx 0.00
168 ppmdv, 3%
O2 dry - 3 hour
rolling avg.
4 27 CO 81% 01/22/25 08/28/24 4 NOx 0.00
5 ppmdv, 15%
O2 dry - 30 day
rolling average
4 27 O2 91% 01/22/25 08/28/24 5 NOx 0.00
5 ppmdv, 15%
O2 dry - 30 day
rolling average
5 24 NOx 93% 01/23/25 08/28/24 6 NOx 0.00
5 ppmdv, 15%
O2 dry - 30 day
rolling average
5 24 CO 93% 01/23/25 08/28/24 4 CO 0.00
10 ppmdv, 15%
O2 dry - 8-hour
block average
5 24 O2 93% 01/23/25 08/28/24 5 CO 0.00
10 ppmdv, 15%
O2 dry - 8-hour
block average
6 24 NOx 93% 01/24/25 08/29/24 6 CO 0.00
10 ppmdv, 15%
O2 dry - 8-hour
block average
6 24 CO 88% 01/24/25 08/29/24 4 NOx 0.00
22.2
lb/hour,15% O2
dry - 30 day
rolling average
for units 4, 5, 6
6 24 O2 93% 01/24/25 08/29/24 5 NOx 0.00
22.2
lb/hour,15% O2
dry - 30 day
rolling average
for units 4, 5, 6
6 NOx 0.00
22.2
lb/hour,15% O2
dry - 30 day
rolling average
for units 4, 5, 6
3

First Quarter 2025
% Monitor Availability (MA) Performance Test Dates
(N/A to Opacity)
Summary of Excess Emissions During Point
Source Operation
Point
Source
Op.
hrs. Channel MA CGA Lin RATA Point
Source Channel Hrs. Limitation
4 NOx 0.00
600 lb/day,15%
O2 dry - 24-
hour block
average for units
4, 5, 6
5 NOx 0.00
600 lb/day,15%
O2 dry - 24-
hour block
average for units
4, 5, 6
6 NOx 0.00
600 lb/day,15%
O2 dry - 24-
hour block
average for units
4, 5, 6
4 CO 0.00
26.9
lb/hour,15% O2
dry - 8-hour
block average
for units 4, 5, 6
5 CO 0.00
26.9
lb/hour,15% O2
dry - 8-hour
block average
for units 4, 5, 6
6 CO 0.00
26.9
lb/hour,15% O2
dry - 8-hour
block average
for units 4, 5, 6
4 NOx 0.00
116 ppmdv,
15% O2 dry - 4
hour rolling
average
5 NOx 0.00
116 ppmdv,
15% O2 dry - 4
hour rolling
average
6 NOx 0.00
116 ppmdv,
15% O2 dry - 4
hour rolling
average

4

Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
1 NOx 0 0 0 0 0 179 lb/hr - 3 hour rolling avg.
1 NOx 0 0 0 0 0 336 ppmdv, 3% O2 dry - 3 hour
rolling avg.
2 NOx 0 0 0 0 0 204 lb/hr - 3 hour rolling avg.
2 NOx 0 0 0 0 0 336 ppmdv, 3% O2 dry - 3 hour
rolling avg.
3 NOx 0 0 0 0 0 142 lb/hr, Nov. 1-Feb. 28(29) - 3
hour rolling avg.
3 NOx 0 0 0 0 0 203 lb/hr, Mar. 1-Oct. 31 - 3
hour rolling avg.
3 NOx 0 0 0 0 0 168 ppmdv, 3% O2 dry - 3 hour
rolling avg.
4 NOx 0 0 0 0 0 5 ppmdv, 15% O2 dry - 30 day
rolling average
5 NOx 0 0 0 0 0 5 ppmdv, 15% O2 dry - 30 day
rolling average
6 NOx 0 0 0 0 0 5 ppmdv, 15% O2 dry - 30 day
rolling average
4 CO 0 0 0 0 0 10 ppmdv, 15% O2 dry - 8-hour
block average
5 CO 0 0 0 0 0 10 ppmdv, 15% O2 dry - 8-hour
block average
6 CO 0 0 0 0 0 10 ppmdv, 15% O2 dry - 8-hour
block average
4 NOx 0 0 0 0 0
22.2 lb/hour,15% O2 dry - 30
day rolling average for units 4, 5,
6
5 NOx 0 0 0 0 0
22.2 lb/hour,15% O2 dry - 30
day rolling average for units 4, 5,
6
6 NOx 0 0 0 0 0
22.2 lb/hour,15% O2 dry - 30
day rolling average for units 4, 5,
6
4 NOx 0 0 0 0 0
600 lb/day,15% O2 dry - 24-
hour block average for units 4, 5,
6
5 NOx 0 0 0 0 0
600 lb/day,15% O2 dry - 24-
hour block average for units 4, 5,
6
6 NOx 0 0 0 0 0
600 lb/day,15% O2 dry - 24-
hour block average for units 4, 5,
6
4 CO 0 0 0 0 0
26.9 lb/hour,15% O2 dry - 8-
hour block average for units 4, 5,
6
5 CO 0 0 0 0 0
26.9 lb/hour,15% O2 dry - 8-
hour block average for units 4, 5,
6
5

Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
6 CO 0 0 0 0 0
26.9 lb/hour,15% O2 dry - 8-
hour block average for units 4, 5,
6
4 NOx 0 0 0 0 0 116 ppmdv, 15% O2 dry - 4 hour
rolling average
5 NOx 0 0 0 0 0 116 ppmdv, 15% O2 dry - 4 hour
rolling average
6 NOx 0 0 0 0 0 116 ppmdv, 15% O2 dry - 4 hour
rolling average

CMS Performance Summary - Hourly Summary
Point
Source Channel Monitor
Malfunction
Non-monitor
Malfunction
QA
Calibrations
Other
Known
Causes
Unknown
Causes
1 NOx 0 0 16 0 0
1 CO2 0 0 16 0 0
2 NOx 0 0 2 0 0
2 CO2 0 0 2 0 0
3 NOx 0 0 0 0 0
3 CO2 0 0 0 0 0
4 NOx 0 1 1 0 0
4 CO 0 5 1 0 0
4 O2 0 1 1 0 0
5 NOx 0 0 2 0 0
5 CO 0 0 2 0 0
5 O2 0 0 2 0 0
6 NOx 0 0 2 0 0
6 CO 0 0 3 0 0
6 O2 0 0 2 0 0

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
0 Hours 57 Hours 0 Hours 0 Events

6

SOURCE INSPECTION
SUMMARY EVALUATION: Gadsby maintains its CEMS as required in R307-170 and 40 CFR 60.13.

CURRENT
RECOMMENDATIONS: All deviations appear to be a result of breakdown or process related
problems that do not warrant issuing a violation. Gadsby was in
compliance during this reporting period. No enforcement actions are
recommended at this time.

The NSPS monitoring system meets the performance standards of 40 CFR
60, Appendix B Performance Specifications. Gadsby’s acid rain
monitoring system meets the performance standards of 40 CFR 75 Acid
Rain Performance Specifications.

HPV: No

RECOMMENDATION
FOR NEXT INSPECTION: Check DAS for daily zero and span drift.
Check the QC program to ensure that monitor drift is being tracked and
that the source can identify excessive drift.

ATTACHMENTS: Excel spreadsheet review
Yr,*sl*flsg.n"r
Gadsby Plant
1359 West North Temple (Rear)
Salt Lake City, UT 841 16
Re:
April28,2025
Bryce Bird, Director
Utah Department of Environmental Quality
Division of Air Quality
P.O. Box 144820
Salt Lake City, UT 84114-4820
USEPA Acid Rain Prooram's 1tt Quarter. 2025 Report - Gadsbv Plant
Dear Mr. Bird:
The quarterly reports for the 1st quarter 2025 for the Gadsby Plant, ORIS Code 3648, boiler/stack lD's 1 ,
2, 3, 4,5, and 6 have been submitted electronically to, and accepted by, the Environmental Protection
Agency. The submittals are summarized in the following table:
Boiler lD
Submission Type
Date of Submittal Receipt lD
1 Emissions 0412312025 1 759209
1 Qualitv Assurance / Certification 0412312025 1 759208
2 Emissions 0412312025 1759225
2 Qualitv Assurance / Certification o4123t2025 1759224
3 Emissions 0412312025 1759236
3 Qualitv Assurance / Certification 0412312025 1759235
4 Emissions 0412312025 1759246
4 Qualitv Assurance / Certification 04t23t2025 1759245
5 Emissions 0412312025 1759253
5 Quality Assurance / Certification 0412312025 1759252
6 Emissions 04123t202s 1759258
6 Quality Assurance / Certification 0412312025 1759257
Electronic copies of these reports are included with this mailing for the Utah Division of Air Quality.
I certify that all data submitted in this report were recorded in accordance with the applicable
requirements of 40 CFR Part 75, and that all emission and quality control data are reported using
component lD codes, system lD codes, and formula lD codes which represent current operating
conditions.
I am authorized to make this submission on behalf of the owners and operators of the affected source or
affected units for which the submission is made. I certify under penalty of law that I have personally
examined, and am familiar with, the statements and information submitted in this document and all its
attachments. Based on my inquiry of those individuals with primary responsibility for obtaining the
information, I certify that the statements and information are to the best of my knowledge and belief true,
ENVIRONMENTAL OUAUTY
APR 2 I ?f;?r:
accurate, and complete. I am aware that there are significant penalties for submitting false statements
and information, or omitting statements and information, including the possibili$ of fine or imprisonment.
Should you have any questions regarding this information, please contact Bill Kennick, Gadsby Plant
Manager [phone] or Brett Shakespear, PacifiCorp Environmental Manager (801) 2204581 .
Sincerely,
eqk*A
BillKennick
Plant Manager
Gadsby Plant
Enclosure: Electronic Data Reports
cc: Director - USEPA Region Vlllw/o enclosure
Brett Shakespear - 210 NTO w/o enclosure
Leah Tiberius - Gadsby Plant Menclosure
Pacificorp Gadsby EER1Q2025
Point Source Information Late Expired Cal. Gas Valid Cal. Gas Days Yes No
1 Type Code 100
(Company Information)Type Code Company Manager Company Name AIRS # Phone Number
Environmental
Contact
1 100 Bill Kennick 03500068 801-227708 Leah Tiberius Dickson
1 100 0 0 0 0
1 Type Code 110
(Point Source Identification)Type Code Point Source
Quarter
1 - 4 Year
Point Source
Operating Hrs. in
Quarter
1 110 1 2025 640.92
1 110 1 2025 870.52
1 110 1 2025 984.63
1 110 1 2025 27.22
1 110 1 2025 24.36
1 110 1 2025 24.74
1 110 0 0 0
1 Type Code 200
(Monitor Identification)Type Code Point Source Channel Manufacturer Model No. Monitor SN Low Span High Span Installation Date Monitor
Location
1 200 CO2 Thermo 410iQHL-ABN 12305124129 0 20 8/14/2023 Shelter
1 200 NOx Thermo 42iQLS-ACBNN 12309525996 0 200 8/14/2023 Shelter
1 200 CO2 Thermo 410iQHL-ABN 12305124128 0 20 8/14/2023 Shelter
1 200 NOx Thermo 42iQLS-ACBNN 12309525997 0 200 8/14/2023 Shelter
1 200 CO2 Thermo 410iQHL-ABN 12305124127 0 20 8/14/2023 Shelter
1 200 NOx Thermo 42iQLS-ACBNN 12309525998 50 200 8/14/2023 Shelter
1 200 CO Thermo 48iQ-ABC 12305124124 20 200 8/15/2023 Shelter
1 200 NOx Thermo 42iQLS-ACBNN 12318428624 10 200 8/15/2023 Shelter
1 200 O2 Thermo 48iQ-ABC 12305124124 0 25 8/15/2023 Shelter
1 200 CO Thermo 48iQ-ABC 12305124125 20 200 8/17/2023 Shelter
1 200 NOx Thermo 42iQLS 12305124117 10 200 8/17/2023 Shelter
1 200 O2 Thermo 48iQ-ABC 12305124125 0 25 8/17/2023 Shelter
1 200 CO Thermo 48iQ-ABC 12305124126 20 200 8/16/2023 Shelter
1 200 NOx Thermo 42iQLS-ACBNN 12309525999 10 200 8/16/2023 Shelter
1 200 O2 Thermo 48iQ-ABC 12305124126 0 25 8/16/2023 Shelter
1 200 0 0 0 0 0 0 1/0/1900 0
1 Type Code310
(Excess Emissions)
SUMMARY REPORT
Type Code Channel
Total Hours of Excess
Emissions
Excess Emissions -
% of Total
Operating Hours
RC 701 Hours -
start
up/Shutdown
RC 702 Hours-
Control Equipment
Problems
RC 703 Hours -
Process Problems
RC 704, 706, 707
Hours -Other Known
Causes
RC 705 Hours -
Unknown
Causes
Emission
Limitation
Emission
Limitation
Units
Emission
Limitation
Averaging
Period
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 179 lb/hr 3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 336 ppmdv, 3% O2 dry3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 204 lb/hr 3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 336 ppmdv, 3% O2 dry3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 142 lb/hr, Nov. 1-Feb. 28(29)3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 203 lb/hr, Mar. 1-Oct. 31 3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 168 ppmdv, 3% O2 dry3 hour rolling avg.
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 5 ppmdv, 15% O2 dry30 day rolling average
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 5 ppmdv, 15% O2 dry30 day rolling average
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 5 ppmdv, 15% O2 dry30 day rolling average
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 10 ppmdv, 15% O2 dry8 hour block average
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 10 ppmdv, 15% O2 dry8 hour block average
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 10 ppmdv, 15% O2 dry8 hour block average
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 22.2 lb/hour,15% O2 dry30 day rolling average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 22.2 lb/hour,15% O2 dry30 day rolling average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 22.2 lb/hour,15% O2 dry30 day rolling average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 600 lb/day,15% O2 dry24 hour block average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 600 lb/day,15% O2 dry24 hour block average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 600 lb/day,15% O2 dry24 hour block average for units 4, 5, 6
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 26.9 lb/hour,15% O2 dry8 hour block average for units 4, 5, 6
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 26.9 lb/hour,15% O2 dry8 hour block average for units 4, 5, 6
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 26.9 lb/hour,15% O2 dry8 hour block average for units 4, 5, 6
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 116 ppmdv, 15% O2 dry4 hour rolling average
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 116 ppmdv, 15% O2 dry4 hour rolling average
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 116 ppmdv, 15% O2 dry4 hour rolling average
1 310 0 0 0 0 0 0 0 0 0
6
4
5
6
4
5
6
4
5
6
4
5
6
0
5
6
6
6
0
PacifiCorp Gadsby Plant
0
1
1
2
2
3
3
4
4
4
5
5
3
3
4
1
2
3
4
5
6
0
2
2
3
4
5
Point Source
5
6
1
1
Pacificorp Gadsby EER1Q2025
1 Type Code 300 (CMS
Performance Summary) Type Code Channel
Point Source Operating
Hours
Downtime - % of
Total Operating
Hours
Total CMS
Downtime
RC 721 Hours -
Monitor
Malfunction
RC 722 Hours -
Non-monitor
Malfunction
RC 723 Hours -
QA Calibrations
RC 724 Hours -
Other Known
Causes
RC 725
Hours -
Unknown
Causes
1 TRUE 300 NOx 640.92 2.43% 15.583 0 0 15.533 0.05 0
1 TRUE 300 CO2 640.92 2.43% 15.583 0 0 15.533 0.05 0
1 TRUE 300 NOx 870.52 0.24% 2.117 0 0 2.117 0 0
1 TRUE 300 CO2 870.52 0.24% 2.117 0 0 2.117 0 0
1 TRUE 300 NOx 984.63 0.00% 0 0 0 0 0 0
1 TRUE 300 CO2 984.63 0.00% 0 0 0 0 0 0
1 TRUE 300 NOx 27.22 8.51% 2.317 0 1.267 1.05 0 0
1 TRUE 300 CO 27.22 19.47% 5.3 0 4.633 0.667 0 0
1 TRUE 300 O2 27.22 8.51% 2.317 0 1.267 1.05 0 0
1 TRUE 300 NOx 24.36 6.57% 1.6 0 0 1.6 0 0
1 TRUE 300 CO 24.36 6.57% 1.6 0 0 1.6 0 0
1 TRUE 300 O2 24.36 6.57% 1.6 0 0 1.6 0 0
1 TRUE 300 NOx 24.74 7.14% 1.766 0 0 1.733 0.033 0
1 TRUE 300 CO 24.74 12.19% 3.016 0 0 2.983 0.033 0
1 TRUE 300 O2 24.74 7.14% 1.766 0 0 1.733 0.033 0
1 300 0 0 0 0 0 0
1
Type Code 250
(Performance Specification
RATA Results)
Type Code Channel
Date of Most Current
RATA
Date of Preceding
RATA
Months Between
RATA's
Units of
Measurement CEM Value Reference Method
Value
Relative
accuracy Pass/ Fail
1 350 Days 250 NOx 08/26/24 09/11/23 11.5 #/MMBtu, CO2dil. 0.146 0.14 [d] = 0.006 pass
1 350 Days 250 NOx 08/26/24 09/11/23 11.5 ppmvd @ 3 O2 120.633 116.344 5.11% pass
1 346 Days 250 NOx 08/26/24 09/15/23 11.4 #/MMBtu, CO2dil. 0.144 0.148 [d] = 0.004 pass
1 346 Days 250 NOx 08/26/24 09/15/23 11.4 ppmvd @ 3 O2 119.333 115.967 4.56% pass
1 349 Days 250 NOx 08/27/24 09/13/23 11.5 #/MMBtu, CO2dil. 0.099 0.105 [d] = 0.006 pass
1 349 Days 250 NOx 08/27/24 09/13/23 11.5 ppmvd @ 3 O2 81.411 85.356 5.17% pass
1 349 Days 250 NOx 08/28/24 09/14/23 11.5 ppmvd @15O2 2.744 2.522 13.30% pass
1 349 Days 250 NOx 08/28/24 09/14/23 11.5 #/MMBtu, O2dil. 0.01 0.009 [d] = 0.001 pass
1 349 Days 250 O2 08/28/24 09/14/23 11.5 vd 16.078 16.256 1.49% pass
1 349 Days 250 CO 08/28/24 09/14/23 11.5 ppmvd @15O2 1.978 1.1 [d] + CC = 0.93Apass
1 348 Days 250 NOx 08/28/24 09/15/23 11.4 ppmvd @15O2 3.178 3.433 9.40% pass
1 348 Days 250 NOx 08/28/24 09/15/23 11.4 #/MMBtu, O2dil. 0.012 0.013 [d] = 0.001 pass
1 348 Days 250 O2 08/28/24 09/15/23 11.4 vd 16.222 16.211 0.35% pass
1 348 Days 250 CO 08/28/24 09/15/23 11.4 ppmvd @15O2 2.078 1.767 [d] + CC = 0.36Apass
1 350 Days 250 NOx 08/29/24 09/14/23 11.5 ppmvd @15O2 2.456 2.367 6.77% pass
1 350 Days 250 NOx 08/29/24 09/14/23 11.5 #/MMBtu, O2dil. 0.009 0.009 [d] = 0.000 pass
1 350 Days 250 O2 08/29/24 09/14/23 11.5 vd 16.278 16.411 1.39% pass
1 350 Days 250 CO 08/29/24 09/14/23 11.5 ppmvd @15O2 1.522 1.333 [d] + CC = 0.29Apass
1 0 Days 250 0 01/00/00 01/00/00 0 0 0 0 0.00% 0
1 Type Code 260
(CGA Results)Type Code Channel Date Audit Point No. Cylinder ID
Cylinder
Expiration Date
Type of
Certification
Units of
Measurement CEM Value Cylinder
Value
Precision
%Pass/ Fail Range - High or
Low
1 Valid Cal. Gas 260 CO 01/22/25 low DT0016399 08/16/25 P1 ppm 4.941 5 120.00% Pass Low
1 Valid Cal. Gas 260 CO 01/22/25 mid CC117990 09/11/25 P1 ppm 10.87 11.1 210.00% Pass Low
1 Valid Cal. Gas 260 CO 01/22/25 low DT0008297 08/06/27 P1 ppm 50.638 49.2 290.00% Pass High
1 Valid Cal. Gas 260 CO 01/22/25 mid DT0027748 12/01/30 P1 ppm 110.206 110.3 10.00% Pass High
1 Valid Cal. Gas 260 CO 01/23/25 low SGAL1089 06/04/29 P1 ppm 5.29 5.17 230.00% Pass Low
1 Valid Cal. Gas 260 CO 01/23/25 mid CC144297 08/16/25 P1 ppm 11.58 11.01 520.00% Pass Low
1 Valid Cal. Gas 260 CO 01/23/25 low CC3243 09/24/27 P1 ppm 52.287 49.5 560.00% Pass High
1 Valid Cal. Gas 260 CO 01/23/25 mid DT0038127 12/01/30 P1 ppm 111.981 110.4 140.00% Pass High
1 Valid Cal. Gas 260 CO 01/24/25 low CC104785 05/29/28 P1 ppm 5.018 4.99 60.00% Pass Low
1 Valid Cal. Gas 260 CO 01/24/25 mid CC16142 09/11/25 P1 ppm 11.061 11.07 10.00% Pass Low
1 Valid Cal. Gas 260 CO 01/24/25 low CC11331 09/24/27 P1 ppm 51.158 49.2 400.00% Pass High
1 Valid Cal. Gas 260 CO 01/24/25 mid DT0029072 12/01/30 P1 ppm 110.056 110.1 0.00% Pass High
1 260 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0
4
4
5
5
5
5
6
2
2
3
3
1
6
0
5
5
5
6
6
4
5
5
5
6
4
4
4
4
5
2
3
3
4
4
1
Point Source
Point Source
Point Source
6
6
6
0
4
4
6
1
2
6
6
0
1
Pacificorp Gadsby EER1Q2025
1 Type Code 270
(Linearity Test Results)Type Code Channel Date Audit Point No. Cylinder ID
Cylinder
Expiration Date
Type of
Certification
Units of
Measurement CEM Value Cylinder
Value
Precision
%Pass/ Fail Range - High or
Low
1 Valid Cal. Gas 270 CO2 01/23/25 low DT0045488 06/22/30 P1 % 5.1 5 200.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/23/25 mid DT0048948 11/25/32 P1 % 11 11 0.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/23/25 high EB0147361 10/07/30 P1 % 17.333 18 370.00% Pass 0
1 Valid Cal. Gas 270 NOx 01/23/25 low DT0045488 06/22/30 P1 ppm 51.067 50.1 190% Pass high
1 Valid Cal. Gas 270 NOx 01/23/25 mid DT0048948 11/25/32 P1 ppm 109.3 108.8 50% Pass high
1 Valid Cal. Gas 270 NOx 01/23/25 high EB0147361 10/07/30 P1 ppm 173.867 180 340% Pass high
1 Valid Cal. Gas 270 CO2 01/21/25 low DT0045488 06/22/30 P1 % 5.1 5 200.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/21/25 mid CC135043 12/07/31 P1 % 10.9 10.9 0.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/21/25 high EB0147361 10/07/30 P1 % 18.2 18 110.00% Pass 0
1 Valid Cal. Gas 270 NOx 01/21/25 low DT0045488 06/22/30 P1 ppm 50.033 50.1 10.00% Pass high
1 Valid Cal. Gas 270 NOx 01/21/25 mid CC135043 12/07/31 P1 ppm 108 108 0.00% Pass high
1 Valid Cal. Gas 270 NOx 01/21/25 high EB0147361 10/07/30 P1 ppm 174.3 180 320.00% Pass high
1 Valid Cal. Gas 270 CO2 01/21/25 low DT0045527 06/22/30 P1 % 5.1 5 200.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/21/25 mid CC120977 12/07/31 P1 % 11.033 11 30.00% Pass 0
1 Valid Cal. Gas 270 CO2 01/21/25 high CC328287 11/22/30 P1 % 17.6 18.2 330.00% Pass 0
1 Valid Cal. Gas 270 NOx 01/21/25 low DT0008500 02/11/25 P1 ppm 11.933 12.2 220% Pass Low
1 Valid Cal. Gas 270 NOx 01/21/25 mid CC17461 02/21/27 P1 ppm 26.933 26.9 10% Pass Low
1 Valid Cal. Gas 270 NOx 01/21/25 high DT0013934 04/14/25 P1 ppm 45.6 45.8 40% Pass Low
1 Valid Cal. Gas 270 NOx 01/21/25 low DT0045527 06/22/30 P1 ppm 50.333 50 70.00% Pass High
1 Valid Cal. Gas 270 NOx 01/21/25 mid CC120977 12/07/31 P1 ppm 109 108.5 50.00% Pass High
1 Valid Cal. Gas 270 NOx 01/21/25 high CC328287 11/22/30 P1 ppm 174.9 180.7 320.00% Pass High
1 Valid Cal. Gas 270 NOx 01/22/25 low DT0008297 08/06/27 P1 ppm 49 50.8 350.00% Pass High
1 Valid Cal. Gas 270 NOx 01/22/25 mid CC328418 08/13/29 P1 ppm 108.533 110.6 190.00% Pass High
1 Valid Cal. Gas 270 NOx 01/22/25 high DT0027748 12/01/30 P1 ppm 178.4 180 90.00% Pass High
1 Valid Cal. Gas 270 O2 01/22/25 low DT0016399 08/16/25 P1 % 6.233 6.3 110.00% Pass 0
1 Valid Cal. Gas 270 O2 01/22/25 mid CC117990 09/11/25 P1 % 13.5 13.5 0.00% Pass 0
1 Valid Cal. Gas 270 O2 01/22/25 high CC244369 11/09/31 P1 % 20.933 21 30.00% Pass 0
1 Valid Cal. Gas 270 NOx 01/23/25 low CC3243 09/24/27 P1 ppm 47.933 49.6 340.00% Pass High
1 Valid Cal. Gas 270 NOx 01/23/25 mid CC240996 06/09/28 P1 ppm 107.267 108.4 100.00% Pass High
1 Valid Cal. Gas 270 NOx 01/23/25 high DT0038127 12/01/30 P1 ppm 177.267 180 150.00% Pass High
1 Valid Cal. Gas 270 O2 01/23/25 low SGAL1089 06/04/29 P1 % 6.2 6.3 160.00% Pass 0
1 Valid Cal. Gas 270 O2 01/23/25 mid CC144297 08/16/25 P1 % 13.5 13.5 0.00% Pass 0
1 Valid Cal. Gas 270 O2 01/23/25 high DT0044634 09/16/32 P1 % 20.9 21.1 90.00% Pass 0
1 Valid Cal. Gas 270 NOx 01/24/25 low CC11331 09/24/27 P1 ppm 48.333 49.7 280.00% Pass High
1 Valid Cal. Gas 270 NOx 01/24/25 mid CC283263 11/21/30 P1 ppm 110.7 112.1 120.00% Pass High
1 Valid Cal. Gas 270 NOx 01/24/25 high DT0029072 12/01/30 P1 ppm 179.567 181 80.00% Pass High
1 Valid Cal. Gas 270 O2 1/24/25 low CC104785 5/29/28 P1 % 6 6 0 Pass 0
1 Valid Cal. Gas 270 O2 1/24/25 mid CC16142 9/11/25 P1 % 14 14 0 Pass 0
1 Valid Cal. Gas 270 O2 1/24/25 high CC28016 11/9/31 P1 % 21 21 0 Pass 0
1 270 0 1/0/00 0 0 1/0/00 0 0 0 0 0 0 0
1
Type Code 210
(Pollutant Concentration
Exceeded Span of CEM)
Type Code Channel Start Date Start Time End Date End Time Hours
1 0 0 0 1/0/00 0:00 1/0/00 0:00
1
1 None Reported
1 0 TC 220 Hours 56.68 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 56.68 TC 300 Hours 0.00 TRUE
2
0
0
3
3
3
1
2
2
2
2
1
1
1
1
1
3
3
2
Type Code 210
(Pollutant Concentration
Exceeded Span of CEM)
Type Code 220
(Monitor Outage
During Point Source Operation)
Type Code 230
(Manual Sample - Alternate
Sampling During Monitor
Outage)
Type Code 240
(CEM Modifications)
Type Code 530
(Excess Emissions During
Emergency Conditions)
Type Code 550
(Changes in Operation in
Control Equipment When
CEM Data Not Available)
Type Code 500
(Boiler Operating Days
w/o 18 Hours of Data)
Type Code 450
(Data Excluded)
Point Source
Point Source
Yes
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
6
6
None Reported None Reported None Reported None Reported None Reported None Reported
Pacificorp Gadsby EER1Q2025
Relative Accuracy Overview
Point Source Channel
Date of Most
Current
RATA
Date of
Preceding
RATA
Months Between
RATA's
Units
Measured CEM Value Reference Method
Value
Relative
Accuracy Pass/ Fail 2025
1 NOx 08/26/24 09/11/23 11.5 #/MMBtu, CO2dil.0.146 0.14 [d] = 0.006 pass
1 NOx 08/26/24 09/11/23 11.5 ppmvd @ 3 O2 120.633 116.34 5.11% pass
2 NOx 08/26/24 09/15/23 11.4 #/MMBtu, CO2dil.0.144 0.15 [d] = 0.004 pass
2 NOx 08/26/24 09/15/23 11.4 ppmvd @ 3 O2 119.333 115.97 4.56% pass
3 NOx 08/27/24 09/13/23 11.5 #/MMBtu, CO2dil.0.099 0.11 [d] = 0.006 pass
3 NOx 08/27/24 09/13/23 11.5 ppmvd @ 3 O2 81.411 85.36 5.17% pass
4 NOx 08/28/24 09/14/23 11.5 ppmvd @15O2 2.744 2.52 13.30% pass
4 NOx 08/28/24 09/14/23 11.5 #/MMBtu, O2dil. 0.01 0.01 [d] = 0.001 pass
4 O2 08/28/24 09/14/23 11.5 vd 16.078 16.26 1.49% pass
4 CO 08/28/24 09/14/23 11.5 ppmvd @15O2 1.978 1.10 [d] + CC = 0.93A pass
5 NOx 08/28/24 09/15/23 11.4 ppmvd @15O2 3.178 3.43 9.40% pass
5 NOx 08/28/24 09/15/23 11.4 #/MMBtu, O2dil. 0.012 0.01 [d] = 0.001 pass
5 O2 08/28/24 09/15/23 11.4 vd 16.222 16.21 0.35% pass
5 CO 08/28/24 09/15/23 11.4 ppmvd @15O2 2.078 1.77 [d] + CC = 0.36A pass
6 NOx 08/29/24 09/14/23 11.5 ppmvd @15O2 2.456 2.37 6.77% pass
6 NOx 08/29/24 09/14/23 11.5 #/MMBtu, O2dil. 0.009 0.01 [d] = 0.000 pass
6 O2 08/29/24 09/14/23 11.5 vd 16.278 16.41 1.39% pass
6 CO 08/29/24 09/14/23 11.5 ppmvd @15O2 1.522 1.33 [d] + CC = 0.29A pass
NSPS CGA First 2025
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
4 CO 1/22/25 20 5 4 to 6
4 CO 1/22/25 20 11.1 10 to 12
4 CO 1/22/25 200 49.2 40 to 60
4 CO 1/22/25 200 110.3 100 to 120
5 CO 1/23/25 20 5.17 4 to 6
5 CO 1/23/25 20 11.01 10 to 12
5 CO 1/23/25 200 49.5 40 to 60
5 CO 1/23/25 200 110.4 100 to 120
6 CO 1/24/25 20 4.99 4 to 6
6 CO 1/24/25 20 11.07 10 to 12
6 CO 1/24/25 200 49.2 40 to 60
6 CO 1/24/25 200 110.1 100 to 120
Acid Rain Audit Linearity First 2025
Low Span Gas Ranges High Span Gas Ranges
Low Mid High Low Mid High
1 CO2 1/23/25 20 5 4 to 6
1 CO2 1/23/25 20 11 10 to 12
1 CO2 1/23/25 20 18 16 to 20
1 NOx 1/23/25 200 50.1 40 to 60
1 NOx 1/23/25 200 108.8 100 to 120
1 NOx 1/23/25 200 180 160 to 200
2 CO2 1/21/25 20 5 4 to 6
2 CO2 1/21/25 20 10.9 10 to 12
2 CO2 1/21/25 20 18 16 to 20
2 NOx 1/21/25 200 50.1 40 to 60
2 NOx 1/21/25 200 108 100 to 120
2 NOx 1/21/25 200 180 160 to 200
3 CO2 1/21/25 20 5 4 to 6
3 CO2 1/21/25 20 11 10 to 12
3 CO2 1/21/25 20 18.2 16 to 20
3 NOx 1/21/25 50 12.2 10 to 15
3 NOx 1/21/25 50 26.9 25 to 30
3 NOx 1/21/25 50 45.8 40 to 50
3 NOx 1/21/25 200 50 40 to 60
3 NOx 1/21/25 200 108.5 100 to 120
3 NOx 1/21/25 200 180.7 160 to 200
4 NOx 1/22/25 200 50.8 40 to 60
4 NOx 1/22/25 200 110.6 100 to 120
4 NOx 1/22/25 200 180 160 to 200
4 O2 1/22/25 25 6.3 5 to 7.5
4 O2 1/22/25 25 13.5 12.5 to 15
4 O2 1/22/25 25 21 20 to 25
5 NOx 1/23/25 200 49.6 40 to 60
5 NOx 1/23/25 200 108.4 100 to 120
5 NOx 1/23/25 200 180 160 to 200
5 O2 1/23/25 25 6.3 5 to 7.5
5 O2 1/23/25 25 13.5 12.5 to 15
5 O2 1/23/25 25 21.1 20 to 25
6 NOx 1/24/25 200 49.7 40 to 60
6 NOx 1/24/25 200 112.1 100 to 120
6 NOx 1/24/25 200 181 160 to 200
6 O2 1/24/25 25 6.3 5 to 7.5
6 O2 1/24/25 25 13.5 12.5 to 15
6 O2 1/24/25 25 21.1 20 to 25
Audit Gas Used
Point Source Channel Audit Date Low Span
Point Source Channel Audit Date Low Span
Audit Gas Used High Span Audit Gas Used
High SpanAudit Gas Used
Pacificorp Gadsby EER1Q2025
Monitoring Information TC 210, 230, & 240
Type Code 210(Pollutant ConcentraƟon Exceeded Span of CEM) - 500(All)
*
Sum of Hours Column Labels
Row Labels (blank) Grand Total
(blank)0 0
Grand Total 0 0
*
Type Code 230(Manual Sample - Alternate Sampling During Monitor Outage) - 500(All)
*
Sum of Hours Column Labels
Row Labels (blank) Grand Total
(blank)0 0
Grand Total 0 0
*
Type Code 240(CEM ModificaƟons) - 100 (All)
*
Count of Channel Column Labels
Row Labels (blank) Grand Total
(blank)
(blank)
Grand Total
Pacificorp Gadsby EER1Q2025
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 724 723 722 Grand Total
1
CO2
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.05 0.05
After previous calibration expired when the unit was run again, a
calibration was not performed in the 8 hour grace period after startup
occurred.
7.85 7.85
No valid calibration in previous 26 hours. Unit did not stay online
previously long enough to complete a calibration test. Operators were
instructed to verify unit is on line before initiating a calibration.
7.68 7.68
NOx
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.05 0.05
After previous calibration expired when the unit was run again, a
calibration was not performed in the 8 hour grace period after startup
occurred.
7.85 7.85
No valid calibration in previous 26 hours. Unit did not stay online
previously long enough to complete a calibration test. Operators were
instructed to verify unit is on line before initiating a calibration.
7.68 7.68
2
CO2
After previous calibration expired when the unit was run again, a
calibration was not performed in the 8 hour grace period after startup
occurred.
0.18 0.18
No valid calibration in previous 26 hours. Unit did not stay online
previously long enough to complete a calibration test. Operators were
instructed to verify unit is on line before initiating a calibration.
0.50 0.50
Manual or auto cal failure. Cal initiated again without any maintenance
or after minor maintenance adjustments.0.52 0.52
System placed in maintenance mode to manually calibrate the analyzer.
The system was then returned to service and an auto calibration was
initiated.
0.85 0.85
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.0.07 0.07
NOx
After previous calibration expired when the unit was run again, a
calibration was not performed in the 8 hour grace period after startup
occurred.
0.18 0.18
No valid calibration in previous 26 hours. Unit did not stay online
previously long enough to complete a calibration test. Operators were
instructed to verify unit is on line before initiating a calibration.
0.50 0.50
Manual or auto cal failure. Cal initiated again without any maintenance
or after minor maintenance adjustments.0.52 0.52
System placed in maintenance mode to manually calibrate the analyzer.
The system was then returned to service and an auto calibration was
initiated.
0.85 0.85
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.0.07 0.07
4
NOx
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.0.67 0.67
The span gas regulator malfunctioned resulting in insufficient span gas
flow to the analyzer during the daily calibration causing it to fail. The
regulator was replaced and a second calibration drift test was
performed.
4.63 4.63
CO
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.05 1.05
The span gas regulator malfunctioned resulting in insufficient span gas
flow to the analyzer during the daily calibration causing it to fail. The
regulator was replaced and a second calibration drift test was
performed.
1.27 1.27
O2
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.05 1.05
The span gas regulator malfunctioned resulting in insufficient span gas
flow to the analyzer during the daily calibration causing it to fail. The
regulator was replaced and a second calibration drift test was
performed.
1.27 1.27
Pacificorp Gadsby EER1Q2025
Sum of Hours Column Labels
Row Labels 724 723 722 Grand Total
5
NOx
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.60 1.60
CO
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.60 1.60
O2
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.60 1.60
6
NOx
Manual or auto cal failure. Cal initiated again without any maintenance
or after minor maintenance adjustments.1.25 1.25
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.30 1.30
A Linearity/RATA Test run was performed on the analyzer, which failed
and was aborted. Maintenance was performed on the analyzer and
recalibrated. The analyzer was then returned to service.
0.03 0.03
Prep for RATA/Linearity testing or unit startup.0.43 0.43
CO
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.30 1.30
A Linearity/RATA Test run was performed on the analyzer, which failed
and was aborted. Maintenance was performed on the analyzer and
recalibrated. The analyzer was then returned to service.
0.03 0.03
Prep for RATA/Linearity testing or unit startup.0.43 0.43
O2
Not a valid hour during hour of calibration or prior to valid calibration.
Or not enough valid minutes to make a valid hour.1.30 1.30
A Linearity/RATA Test run was performed on the analyzer, which failed
and was aborted. Maintenance was performed on the analyzer and
recalibrated. The analyzer was then returned to service.
0.03 0.03
Prep for RATA/Linearity testing or unit startup.0.43 0.43
Grand Total 0.20 49.32 7.17 56.68
Pacificorp Gadsby EER1Q2025
NOx *
NOx Type Code 420 (NOx) - 6000 (All)
NOx *
NOx Count of Magnitude of Emissions Column Labels
NOx Row Labels (blank)Grand Total
NOx 1
NOx 0
NOx 2
NOx 0
NOx 3
NOx 0
NOx 4
NOx 0
NOx 5
NOx 0
NOx 6
NOx 0
NOx Grand Total
CO *
CO Type Code 440
(CO) - 6000 (All)
CO *
CO Count of Magnitude of Emissions Column Labels
CO Row Labels (blank)Grand Total
CO 4
CO 0
CO 5
CO 0
CO 6
CO 0
CO Grand Total
O2 *
O2 Type Code 470
(TRS as O2) - 6000 (All)
O2 *
O2 Count of Magnitude of Emissions Column Labels
O2 Row Labels Grand Total
O2 Grand Total
Pacificorp Gadsby EER1Q2025
Type Code 500
Before February 28, 2005 (Boiler Operating Days w/o 18 Hours of
Data) After February 28, 2005 (90% Operating Hours For each 30 BOD)
- 500
(All)
*
Count of Channel Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 510
(F-factor, Equations & Conversion Factors) - 500 (All)
Count of F-factor Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 520
(Minimum Data Not
Obtained <22/30 BODs) - 500
(All)
Count of Channel Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 530
(Excess Emissions During Emergency Conditions) - 500 (All)
Count of Date Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 540
(Fuel Pre-treatment Credit SO2) - 500 (All)
Count of Date Column Labels
Row Labels Grand Total
Grand Total
*
TypeCode 550
(Changes in Operation in Control Equipment When CEM Data Not
Available) - 500
(All)
Column Labels
Row Labels Grand Total
Grand Total