DAQ-2025-001076

1

DAQC-175-25
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: February 13, 2025

SUBJECT: Gadsby Power Plant (Gadsby), Major, SIP, Salt Lake County,
FRS # UT00000049003500068

INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: February 13, 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:

Fourth Quarter 2024
% 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
1 804 NOx 100% 10/10/24 08/26/24 1 NOx 0.00 179 lb/hr - 3 hour
rolling avg.
1 804 CO2 100% 10/10/24 1 NOx 0.00
336 ppmdv, 3% O2
dry - 3 hour rolling
avg.

1 8 2
2

Fourth Quarter 2024
% 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 1097 NOx 99% 10/14/24 08/26/24 2 NOx 0.00 204 lb/hr - 3 hour
rolling avg.
2 1097 CO2 97% 10/14/24 2 NOx 0.00
336 ppmdv, 3% O2
dry - 3 hour rolling
avg.
3 1340 NOx 100% 10/18/24 08/27/24 3 NOx 0.00
142 lb/hr, Nov. 1-
Feb. 28(29) - 3
hour rolling avg.
3 1340 CO2 100% 10/18/24 3 NOx 0.00
203 lb/hr, Mar. 1-
Oct. 31 - 3 hour
rolling avg.
4 29 NOx 96% 10/15/24 08/28/24 3 NOx 0.00
168 ppmdv, 3% O2
dry - 3 hour rolling
avg.
4 29 CO 96% 10/15/24 08/28/24 4 NOx 0.00
5 ppmdv, 15% O2
dry - 30 day rolling
average
4 29 O2 96% 10/15/24 08/28/24 5 NOx 0.00
5 ppmdv, 15% O2
dry - 30 day rolling
average
5 27 NOx 96% 10/16/24 08/28/24 6 NOx 0.00
5 ppmdv, 15% O2
dry - 30 day rolling
average
5 27 CO 96% 10/16/24 08/28/24 4 CO 0.00
10 ppmdv, 15% O2
dry - 8-hour block
average
5 27 O2 80% 10/16/24 08/28/24 5 CO 0.00
10 ppmdv, 15% O2
dry - 8-hour block
average
6 28 NOx 90% 10/17/24 08/29/24 6 CO 0.00
10 ppmdv, 15% O2
dry - 8-hour block
average
6 28 CO 90% 10/17/24 08/29/24 4 NOx 0.00
22.2 lb/hour, 15%
O2 dry - 30 day
rolling average for
units 4, 5, 6
6 28 O2 90% 10/17/24 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
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
3

Fourth Quarter 2024
% 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
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

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
4

Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
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
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 0 0 0
1 CO2 0 0 0 0 0
2 NOx 0 0 13 0 0
2 CO2 0 0 13 17 0
3 NOx 4 0 0 0 0
3 CO2 0 0 0 0 0
4 NOx 0 0 1 0 0
4 CO 0 0 1 0 0
4 O2 0 0 1 0 0
5 NOx 0 0 1 0 0
5

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

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
0 Hours 67 Hours 0 Hours 0 Events

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
Pacificorp Gadsby EER 4Q2024
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 4 2024 804.02
1 110 4 2024 1097.27
1 110 4 2024 1340.64
1 110 4 2024 29.97
1 110 4 2024 27.6
1 110 4 2024 28.53
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
Point Source
1
2
3
4
5
6
0
2
2
3
4
5
5
6
6
6
0
PacifiCorp
0
1
1
2
2
3
3
4
4
4
5
5
3
3
4
5
6
1
1
6
4
5
6
4
5
6
4
5
6
4
5
6
0
Pacificorp Gadsby EER 4Q2024
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 804.02 0.00% 0.03 0 0 0 0.03 0
1 TRUE 300 CO2 804.02 0.00% 0.03 0 0 0 0.03 0
1 TRUE 300 NOx 1097.27 1.18% 12.9 0 0 12.9 0 0
1 TRUE 300 CO2 1097.27 2.76% 30.32 0 0 12.9 17.42 0
1 TRUE 300 NOx 1340.64 0.30% 4.01 3.53 0 0 0.48 0
1 TRUE 300 CO2 1340.64 0.04% 0.48 0 0 0 0.48 0
1 TRUE 300 NOx 29.97 3.90% 1.17 0 0 1.17 0 0
1 TRUE 300 CO 29.97 3.90% 1.17 0 0 1.17 0 0
1 TRUE 300 O2 29.97 3.90% 1.17 0 0 1.17 0 0
1 TRUE 300 NOx 27.6 4.35% 1.2 0 0 1.2 0 0
1 TRUE 300 CO 27.6 4.35% 1.2 0 0 1.2 0 0
1 TRUE 300 O2 27.6 19.57% 5.4 1.58 0 3.82 0 0
1 TRUE 300 NOx 28.53 10.09% 2.88 0 0 2.88 0 0
1 TRUE 300 CO 28.53 10.09% 2.88 0 0 2.88 0 0
1 TRUE 300 O2 28.53 10.09% 2.88 0 0 2.88 0 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 10/15/24 low DT0008297 08/06/27 P1 ppm 49.467 49.2 50.00% Pass High
1 Valid Cal. Gas 260 CO 10/15/24 mid DT0027748 12/01/30 P1 ppm 109.367 110.3 80.00% Pass High
1 Valid Cal. Gas 260 CO 10/15/24 low DT0016399 08/16/25 P1 ppm 4.912 5 180.00% Pass Low
1 Valid Cal. Gas 260 CO 10/15/24 mid CC117990 09/11/25 P1 ppm 11.107 11.1 10.00% Pass Low
1 Valid Cal. Gas 260 CO 10/16/24 low CC3243 09/24/27 P1 ppm 50.667 49.5 240.00% Pass High
1 Valid Cal. Gas 260 CO 10/16/24 mid DT0038127 12/01/30 P1 ppm 109.7 110.4 60.00% Pass High
1 Valid Cal. Gas 260 CO 10/16/24 low SGAL1089 06/04/29 P1 ppm 4.83 5.17 660.00% Pass Low
1 Valid Cal. Gas 260 CO 10/16/24 mid CC144297 08/16/25 P1 ppm 10.852 11.01 140.00% Pass Low
1 Valid Cal. Gas 260 CO 10/17/24 low CC11331 09/24/27 P1 ppm 50.832 49.2 330.00% Pass High
1 Valid Cal. Gas 260 CO 10/17/24 mid DT0029072 12/01/30 P1 ppm 110.556 110.1 40.00% Pass High
1 Valid Cal. Gas 260 CO 10/17/24 low CC104785 05/29/28 P1 ppm 5.078 4.99 180.00% Pass Low
1 Valid Cal. Gas 260 CO 10/17/24 mid CC16142 09/11/25 P1 ppm 11.156 11.07 80.00% Pass Low
1 260 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0
Point Source
Point Source
Point Source
6
6
6
0
6
4
4
4
4
5
4
4
6
2
3
3
4
4
1
1
2
6
4
5
5
5
6
6
0
1
2
2
3
3
1
6
0
5
5
5
6
4
4
5
5
5
5
6
Pacificorp Gadsby EER 4Q2024
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 10/10/24 low DT0045488 06/22/30 P1 % 5.1 5 200.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/10/24 mid CC102212 12/07/31 P1 % 11 11 0.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/10/24 high EB0147361 10/07/30 P1 % 17.4 18 330.00% Pass 0
1 Valid Cal. Gas 270 NOx 10/10/24 low DT0045488 06/22/30 P1 ppm 50.967 50.1 170% Pass high
1 Valid Cal. Gas 270 NOx 10/10/24 mid CC102212 12/07/31 P1 ppm 108.433 108.3 10% Pass high
1 Valid Cal. Gas 270 NOx 10/10/24 high EB0147361 10/07/30 P1 ppm 175 180 170% Pass high
1 Valid Cal. Gas 270 CO2 10/14/24 low DT0045488 06/22/30 P1 % 5.167 5 330.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/14/24 mid CC102212 12/07/31 P1 % 11 11 0.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/14/24 high EB0147361 10/07/30 P1 % 18.2 18 110.00% Pass 0
1 Valid Cal. Gas 270 NOx 10/14/24 low DT0045488 06/22/30 P1 ppm 50.867 50.1 150.00% Pass high
1 Valid Cal. Gas 270 NOx 10/14/24 mid CC102212 12/07/31 P1 ppm 108.9 108.3 60.00% Pass high
1 Valid Cal. Gas 270 NOx 10/14/24 high EB0147361 10/07/30 P1 ppm 176.367 180 200.00% Pass high
1 Valid Cal. Gas 270 CO2 10/18/24 low DT0045527 06/22/30 P1 % 5.1 5 200.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/18/24 mid CC140608 12/07/31 P1 % 11 11 0.00% Pass 0
1 Valid Cal. Gas 270 CO2 10/18/24 high CC328287 11/22/30 P1 % 17.6 18.2 330.00% Pass 0
1 Valid Cal. Gas 270 NOx 10/18/24 low DT008500 02/11/25 P1 ppm 12.033 12.2 140% Pass Low
1 Valid Cal. Gas 270 NOx 10/18/24 mid CC738001 02/21/27 P1 ppm 27 26.9 40% Pass Low
1 Valid Cal. Gas 270 NOx 10/18/24 high DT0013934 04/14/25 P1 ppm 45.9 45.8 20% Pass Low
1 Valid Cal. Gas 270 NOx 10/18/24 low DT0045527 06/22/30 P1 ppm 50.367 50 70.00% Pass High
1 Valid Cal. Gas 270 NOx 10/18/24 mid CC140608 12/07/31 P1 ppm 109.133 107.9 110.00% Pass High
1 Valid Cal. Gas 270 NOx 10/18/24 high CC328287 11/22/30 P1 ppm 175.3 180.7 300.00% Pass High
1 Valid Cal. Gas 270 NOx 10/15/24 low DT0008297 08/06/27 P1 ppm 49.4 50.8 280.00% Pass High
1 Valid Cal. Gas 270 NOx 10/15/24 mid CC258500 01/17/25 P1 ppm 108.333 110.4 190.00% Pass High
1 Valid Cal. Gas 270 NOx 10/15/24 high DT0027748 12/01/30 P1 ppm 179.967 180 0.00% Pass High
1 Valid Cal. Gas 270 O2 10/15/24 low DT0016399 08/16/25 P1 % 6 6.3 480.00% Pass 0
1 Valid Cal. Gas 270 O2 10/15/24 mid CC117990 09/11/25 P1 % 13.4 13.5 70.00% Pass 0
1 Valid Cal. Gas 270 O2 10/15/24 high CC244369 11/09/31 P1 % 21 21 0.00% Pass 0
1 Valid Cal. Gas 270 NOx 10/16/24 low CC3243 09/24/27 P1 ppm 48.667 49.6 190.00% Pass High
1 Valid Cal. Gas 270 NOx 10/16/24 mid CC240996 06/09/28 P1 ppm 108.833 108.4 40.00% Pass High
1 Valid Cal. Gas 270 NOx 10/16/24 high DT0038127 12/01/30 P1 ppm 179.867 180 10.00% Pass High
1 Valid Cal. Gas 270 O2 10/16/24 low SGAL1089 06/04/29 P1 % 6.5 6.3 320.00% Pass 0
1 Valid Cal. Gas 270 O2 10/16/24 mid CC144297 08/16/25 P1 % 13.7 13.5 150.00% Pass 0
1 Valid Cal. Gas 270 O2 10/16/24 high CC724241 01/18/29 P1 % 20.9 20.9 0.00% Pass 0
1 Valid Cal. Gas 270 NOx 10/17/24 low CC11331 09/24/27 P1 ppm 48.433 49.7 250.00% Pass High
1 Valid Cal. Gas 270 NOx 10/17/24 mid CC170076 01/17/25 P1 ppm 108.5 110.7 200.00% Pass High
1 Valid Cal. Gas 270 NOx 10/17/24 high DT0029072 12/01/30 P1 ppm 179.867 181 60.00% Pass High
1 Valid Cal. Gas 270 O2 10/17/24 low CC104785 5/29/28 P1 % 6 6 0 Pass 0
1 Valid Cal. Gas 270 O2 10/17/24 mid CC16142 9/11/25 P1 % 14 14 0 Pass 0
1 Valid Cal. Gas 270 O2 10/17/24 high CC282242 8/2/31 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 66.92 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 67.72 TC 300 Hours 0.80 FALSE
None Reported None Reported None Reported None Reported None Reported None Reported
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
6
6
Point Source
Point Source
Yes
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)
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)
0
3
3
3
1
2
2
2
2
1
1
1
1
1
3
3
2
2
0
Pacificorp Gadsby EER 4Q2024
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 2024
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 Fourth 2024
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
4 CO 10/15/24 200 49.2 40 to 60
4 CO 10/15/24 200 110.3 100 to 120
4 CO 10/15/24 20 5 4 to 6
4 CO 10/15/24 20 11.1 10 to 12
5 CO 10/16/24 200 49.5 40 to 60
5 CO 10/16/24 200 110.4 100 to 120
5 CO 10/16/24 20 5.17 4 to 6
5 CO 10/16/24 20 11.01 10 to 12
6 CO 10/17/24 200 49.2 40 to 60
6 CO 10/17/24 200 110.1 100 to 120
6 CO 10/17/24 20 4.99 4 to 6
6 CO 10/17/24 20 11.07 10 to 12
*
Acid Rain Audit Linearity Fourth 2024
Low Span Gas Ranges High Span Gas Ranges
Low Mid High Low Mid High
1 CO2 10/10/24 20 5 4 to 6
1 CO2 10/10/24 20 11 10 to 12
1 CO2 10/10/24 20 18 16 to 20
1 NOx 10/10/24 200 50.1 40 to 60
1 NOx 10/10/24 200 108.3 100 to 120
1 NOx 10/10/24 200 180 160 to 200
2 CO2 10/14/24 20 5 4 to 6
2 CO2 10/14/24 20 11 10 to 12
2 CO2 10/14/24 20 18 16 to 20
2 NOx 10/14/24 200 50.1 40 to 60
2 NOx 10/14/24 200 108.3 100 to 120
2 NOx 10/14/24 200 180 160 to 200
3 CO2 10/18/24 20 5 4 to 6
3 CO2 10/18/24 20 11 10 to 12
3 CO2 10/18/24 20 18.2 16 to 20
3 NOx 10/18/24 50 12.2 10 to 15
3 NOx 10/18/24 50 26.9 25 to 30
3 NOx 10/18/24 50 45.8 40 to 50
3 NOx 10/18/24 200 50 40 to 60
3 NOx 10/18/24 200 107.9 100 to 120
3 NOx 10/18/24 200 180.7 160 to 200
4 NOx 10/15/24 200 50.8 40 to 60
4 NOx 10/15/24 200 110.4 100 to 120
4 NOx 10/15/24 200 180 160 to 200
4 O2 10/15/24 25 6.3 5 to 7.5
4 O2 10/15/24 25 13.5 12.5 to 15
4 O2 10/15/24 25 21 20 to 25
5 NOx 10/16/24 200 49.6 40 to 60
5 NOx 10/16/24 200 108.4 100 to 120
5 NOx 10/16/24 200 180 160 to 200
5 O2 10/16/24 25 6.3 5 to 7.5
5 O2 10/16/24 25 13.5 12.5 to 15
5 O2 10/16/24 25 20.9 20 to 25
6 NOx 10/17/24 200 49.7 40 to 60
6 NOx 10/17/24 200 110.7 100 to 120
6 NOx 10/17/24 200 181 160 to 200
6 O2 10/17/24 25 6.3 5 to 7.5
6 O2 10/17/24 25 13.5 12.5 to 15
6 O2 10/17/24 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 EER 4Q2024
Monitoring Information TC 210, 230, & 240
Type Code 210
(Pollutant Concentration 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 Modifications) - 100 (All)
*
Count of Channel Column Labels
Row Labels (blank) Grand Total
(blank)
(blank)
Grand Total
Pacificorp Gadsby EER 4Q2024
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 724 723 721 Grand Total
1
CO2
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.02 0.02
NOx
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.02 0.02
2
CO2
Communication failure caused a hardware fault, data calculation error,
PLC rebooted.17.38 17.38
After previous calibration expired when the unit was run again, a
calibration was not performed in the 8 hour grace period after startup
occurred.
12.83 12.83
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.
12.83 12.83
3
CO2
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.07 0.07
A daily calibration reference gas bottle was changed. The bottle was not
valved in, resulting in a calibration fail out of control indication. The
bottle was valved in and a second calibration initiated.
0.37 0.37
NOx
Normal blowback cycle began just as the unit was taken off line or
immediately following a calibration. No action necessary 0.07 0.07
A daily calibration reference gas bottle was changed. The bottle was not
valved in, resulting in a calibration fail out of control indication. The
bottle was valved in and a second calibration initiated.
0.37 0.37
The NOX converter plugged, causing monitor output to decay. Cleaned
or replaced NOX converter and recalibrated analyzer.3.52 3.52
4
NOx
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
1.12 1.12
CO
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
1.12 1.12
O2
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
1.12 1.12
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.1.15 1.15
Pacificorp Gadsby EER 4Q2024
Sum of Hours Column Labels
Row Labels 724 723 721 Grand Total
CO
Not a valid hour during hour of calibration or prior to valid calibration. Or
not enough valid minutes to make a valid hour.1.15 1.15
O2
Not a valid hour during hour of calibration or prior to valid calibration. Or
not enough valid minutes to make a valid hour.1.15 1.15
The daily calibration drift test exceeded 4 times the performance
specification. Critical orifices were cleaned. The analyzer was then
recalibrated and returned to service.
2.58 2.58
The sample pump or relay failed resulting in insufficient sample flow to
one or more of the analyzers. The sample pump or relay was repaired or
replaced and the system returned to service.
1.57 1.57
6
NOx
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
0.77 0.77
System placed in maintenance mode to manually calibrate the analyzer.
The system was then returned to service and an auto calibration was
initiated.
2.07 2.07
CO
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
0.77 0.77
System placed in maintenance mode to manually calibrate the analyzer.
The system was then returned to service and an auto calibration was
initiated.
2.07 2.07
O2
QA calibration initiated during a less than complete firing hour.
Operators instructed to wait until first full hour of firing to initiate
calibration.
0.77 0.77
System placed in maintenance mode to manually calibrate the analyzer.
The system was then returned to service and an auto calibration was
initiated.
2.07 2.07
Grand Total 18.28 43.55 5.08 66.92
Pacificorp Gadsby EER 4Q2024
NOx *
NOx Type Code 420 (NOx) - 6000 (All)
NOx *
NOx Count of Magnitude of Emissions Column Labels
NOx Row Labels Grand Total
NOx Grand Total
NOx d *
NOx d Type Code 421 (Daily NOx Emissions) - 500 (All)
NOx d *
NOx d Count of Reason Code Column Labels
NOx d Row Labels Grand Total
NOx d Grand Total
CO *
CO Type Code 440
(CO) - 6000 (All)
CO *
CO Count of Magnitude of Emissions Column Labels
CO Row Labels Grand Total
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 EER 4Q2024
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