DAQ-2025-002283

1
DAQC-408-25
Site ID 12524 (B4)

MEMORANDUM

TO: STACK TEST FILE – PAFICIFICORP – Currant Creek Plant

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Paul Morris, Environmental Scientist

DATE: April 29, 2025

SUBJECT: Location: 2096 West 300 North, Mona, Juab County, Utah
Contact: David Barnhisel – 435-623-3816
Tester: Mostardi Platt
Source: CTG1A and CTG1B
FRS ID#: UT0000004902300026
Permit# Approval Order DAQE-AN125240009-15 dated January 23, 2015
Action Code: TR
Subject: Review of Stack Test Report Dated February 6, 2025
On February 25, 2025, the Utah Division of Air Quality (DAQ) received a stack test report for the PacifiCorp
Currant Creek Power Plant located in Mona, Utah. Testing was performed on January 7 and 8, 2025, to
determine compliance with Conditions II.B.1.b for PM10 emissions. The DAQ calculated results are:

Source Test Date RM/Pollutant DAQ Result Test Result Limit

CTG1A 1/7/2025 RM 5 & 202/PM10 0.002 lbs/MMBtu 0.002 lbs/MMBtu 0.066 lbs/MMBtu
8.3 lbs/hr 7.7 lbs/hr 13.3 lbs/hr

CTG1B 1/8/2025 RM 5 & 202/PM10 0.002 lbs/MMBtu 0.001 lbs/MMBtu 0.066 lbs/MMBtu
5.4 lbs/hr 4.4 lbs/hr 13.3 lbs/hr

DEVIATIONS: None noted.

CONCLUSION: Units CTG1A and CTG1B should be considered to have been in compliance
with the applicable PM10 emission limits at the time of testing.

RECOMMENDATION: No further action is required.

HPV: No.

ATTACHMENTS: PacifiCorp – Currant Creek Plant test report dated February 6, 2025
DAQ generated excel spreadsheets

6 3
Source Information
Division of Air Quality
Compliance Demonstration
Source Information
Company Name PacifiCorp Currant Creek Power - CTG1B
Company Contact:Tom Wiscomb
Contact Phone No.801-220-2373
Source Designation:CTG1B
Test & Review Dates
Test Date: 1/8/2025
Review Date: 2/10/2025 Tabs Are Shown
Observer:
Reviewer:Paul Morris
Particulate Emission Limits
lbs/MMBtu lbs/hr gr/dscf
0.066 13.300
Emission Rates - "Front Half"
lbs/MMBtu lbs/hr gr/dscf
0.0011 3.8806 0.0007
Test Information
Stack_I.D._inches As ft^2 Y Dl H @ Cp Pbar Pq (static)Dn
202.00 222.55 1.0070 1.795 0.769 25.02 -0.5 0.145
Contractor Information
Contracting Company: Mostardi Platt
Contact: Hal Lee
Phone No.: 801-716-2652
Project No.:
8710
Circular
10100
9780
9860
9190
8710
8710
8710
10540
10640
11950
320
10610
10200
10390
1970
1800
1910
1420
1040
1190
1250
F factor usedF factors for Coal, Oil, and Gas
Anthrocite 2
Lignite
Natural
Propane
Butane
COAL
OIL
GAS
Bituminous 2
Fd Fw Fc
scf/MMBtu scf/MMBtu scf/MMBtu
O2
CO2
lbs/MMBtu
Page 1
Summary
Division of Air Quality
Reference Methods 5 - TSP
Compliance Demonstration of
PacifiCorp Currant Creek Power - CTG1B
Testing Results Lab Data - grams collected
Test Date 1/8/2025 1/8/2025 1/8/2025 1/8/2025 Lab Data Probe Filter Back
Circular Run 1 Run 2 Run 3 Run 4 Run 1 0.0005 0.0004 0.00011
As ft^2 222.55 222.55 222.55 Run 2 0.00054 0.00044 0.00103
Pbar 25.02 25.02 25.02 Run 3 0.00245 0.00097 0.00091
Pq (static)-0.50 -0.50 -0.50 Run 4
Ps 24.98 24.98 24.98
Avg. Ts F 174.42 161.42 161.33 Front Half Emissions Summary
CO2 - FCO2 11.70 11.70 11.60 Run 1 Run 2 Run 3 Run 4 Avg.
O2 5.50 5.60 5.60 gr./dscf 0.0004 0.0004 0.0013 0.0007
N2+C 82.80 82.70 82.80 lbs/hr 1.9857 2.1896 7.4665 3.8806
Md 30.09 30.10 30.08 lbs/MMBtu 5.968E-04 6.530E-04 2.195E-03 0.0011
Ms 28.91 28.76 28.98
Y 1.01 1.01 1.01
Cp 0.77 0.77 0.77 Total Emissions Summary w/back half condensable
Vm cf 43.90 44.85 46.65 Run 1 Run 2 Run 3 Run 4 Avg.
Vlc 90.60 103.70 87.40 gr./dscf 0.0004 0.0008 0.0016 0.0009
AVG. Tm F 37.00 46.92 47.92 lbs/hr 2.2284 4.4910 9.4532 5.3908
Vm std 39.30 39.37 40.87 lbs/MMBtu 6.697E-04 1.339E-03 2.779E-03 0.0016
Vw std 4.26 4.88 4.11
Bws 0.10 0.11 0.09
S Bws 0.54 0.40 0.40
Avg. Sqrt Dlp 1.27 1.29 1.29
Vs 78.29 78.88 78.34 F factor used
scfm wet 726540.42 747260.94 742241.75 8710
acfm 1045471.84 1053254.09 1046039.32
Qsd dscfh 39325292.59 39889624.21 40461300.68
# Sample
Points 12.00 12.00 12.00
Dn 0.145 0.145 0.145
An 1.15E-04 1.15E-04 1.15E-04
Start Time 0:00 0:00 0:00
End Time 0:00 0:00 0:00Total Test
time 120.00 120.00 120.00
Time @ point 10.00 10.00 10.00
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Points
Run 1 PxP Isokinetic
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Sample Points
Run 2 PxP Isokinetic
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Sample Points
Run 3 PxP Isokinetic
O2
CO2
lbs/MMBtu
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
Sample Points
Run 4 PxP Isokinetic
Page 1
Run 1
PacifiCorp Currant Creek Power - CTG1B Flow & Moisture Test Date 1/8/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 174 11.70 5.50 82.80 30.09 28.91
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.5407
1.0070 0.77 43.900 90.60 37.00 39.301 4.265 0.0979 0.5407 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.271 78.29 726,540 1,045,472 3.93E+07 12 0.145 120 10.00 0.380000
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 961.800 1.40 0.38 201 34 Wt. (Final) Wt. (Initial) lc
2 965.285 1.50 0.38 210 34 556.90 481.80 75.1
3 968.870 1.60 0.38 120 34 617.80 615.00 2.8
4 972.845 1.50 0.38 211 34 616.00 615.70 0.3
5 976.420 1.60 0.38 207 34 846.20 833.80 12.4
6 980.135 1.80 0.38 114 34 0.0
7 984.370 1.60 0.38 220 38
8 988.075 1.60 0.38 200 38 Isokinetics 97.0
9 991.830 1.70 0.38 106 38 Test Date 1/8/2025
10 996.010 1.70 0.38 213 42 Start Time enter
11 999.875 1.60 0.38 189 42 End Time
12 1003.695 1.80 0.38 102 42 Run 1
13 1005.700
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Page 1
Run 2
PacifiCorp Currant Creek Power - CTG1B Flow & Moisture Test Date 1/8/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 161 11.70 5.60 82.70 30.10 28.76
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.4000
1.0070 0.77 44.850 103.70 47 39.366 4.881 0.1103 0.4000 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.290 78.88 747,261 1,053,254 3.99E+07 12 0.145 120 10.00 0.38
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 1009.900 1.50 0.38 172.0 46.0 Wt. (Final) Wt. (Initial) lc
2 1013.675 1.50 0.38 169.0 46.0 505.90 429.50 76.4
3 1017.465 1.60 0.38 116.0 46.0 677.60 670.00 7.6
4 1021.550 1.60 0.38 211.0 45.0 770.70 763.20 7.5
5 1025.330 1.70 0.38 172.0 47.0 829.40 817.20 12.2
6 1029.360 1.80 0.38 104.0 47.0 0.0
7 1033.745 1.50 0.38 221.0 49.0
8 1037.410 1.70 0.38 168.0 49.0 Isokinetics 95.8
9 1041.465 1.80 0.38 100.0 47.0 Test Date 1/8/2025
10 1046.110 1.70 0.38 208.0 47.0 Start Time
11 1050.030 1.80 0.38 197.0 47.0 End Time
12 1054.095 1.80 0.38 99.0 47.0 Run 2
13 1054.750
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Run 3
PacifiCorp Currant Creek Power - CTG1B Flow & Moisture Test Date 1/8/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 161 11.60 5.60 82.80 30.08 28.98
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.3992
1.0070 0.77 46.650 87.40 48 40.866 4.114 0.0915 0.3992 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.286 78.34 742,242 1,046,039 4.05E+07 12 0.145 120 10.00 0.38
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 1060.300 1.40 0.38 212.0 46.0 Wt. (Final) Wt. (Initial) lc
2 1063.845 1.50 0.38 153.0 47.0 548.0 481.9 66.1
3 1067.690 1.50 0.38 112.0 47.0 626.6 615.1 11.5
4 1071.670 1.60 0.38 219.0 47.0 616.5 616.0 0.5
5 1075.440 1.50 0.38 149.0 47.0 855.5 846.2 9.3
6 1079.300 1.70 0.38 101.0 47.0 0.0
7 1083.580 1.60 0.38 213.0 49.0
8 1087.385 1.80 0.38 207.0 49.0 Isokinetics 98.0
9 1091.440 1.80 0.38 104.0 49.0 Test Date 1/8/2025
10 1095.850 1.70 0.38 210.0 49.0 Start Time
11 1099.780 1.80 0.38 156.0 49.0 End Time
12 1104.000 2.00 0.38 100.0 49.0 Run 3
13 1106.950
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Page 1
Source Information
Division of Air Quality
Compliance Demonstration
Source Information
Company Name PacifiCorp Currant Creek Power - CTG1A
Company Contact:Tom Wiscomb
Contact Phone No.801-220-2373
Source Designation:CTG1A
Test & Review Dates
Test Date: 1/7/2025
Review Date: 2/10/2025 Tabs Are Shown
Observer:
Reviewer:Paul Morris
Particulate Emission Limits
lbs/MMBtu lbs/hr gr/dscf
0.066 13.300
Emission Rates - "Front Half"
lbs/MMBtu lbs/hr gr/dscf
0.0007 2.3860 0.0004
Test Information
Stack_I.D._inches As ft^2 Y Dl H @ Cp Pbar Pq (static)Dn
202.00 222.55 1.0070 1.795 0.769 25.02 -0.5 0.145
Contractor Information
Contracting Company: Mostardi Platt
Contact: Hal Lee
Phone No.: 801-716-2652
Project No.:
8710
Circular
10100
9780
9860
9190
8710
8710
8710
10540
10640
11950
320
10610
10200
10390
1970
1800
1910
1420
1040
1190
1250
F factor usedF factors for Coal, Oil, and Gas
Anthrocite 2
Lignite
Natural
Propane
Butane
COAL
OIL
GAS
Bituminous 2
Fd Fw Fc
scf/MMBtu scf/MMBtu scf/MMBtu
O2
CO2
lbs/MMBtu
Page 1
Summary
Division of Air Quality
Reference Methods 5 - TSP
Compliance Demonstration of
PacifiCorp Currant Creek Power - CTG1A
Testing Results Lab Data - grams collected
Test Date 1/7/2025 1/7/2025 1/7/2025 1/7/2025 Lab Data Probe Filter Back
Circular Run 1 Run 2 Run 3 Run 4 Run 1 0.0005 0.0004 0.00486
As ft^2 222.55 222.55 222.55 Run 2 0.0005 0.0004 0.00291
Pbar 25.02 25.02 25.02 Run 3 0.00054 0.00094 0.00038
Pq (static)-0.50 -0.50 -0.50 Run 4
Ps 24.98 24.98 24.98
Avg. Ts F 161.50 149.08 154.25 Front Half Emissions Summary
CO2 - FCO2 11.70 11.70 11.70 Run 1 Run 2 Run 3 Run 4 Avg.
O2 5.50 5.50 5.50 gr./dscf 0.0004 0.0003 0.0005 0.0004
N2+C 82.80 82.80 82.80 lbs/hr 1.9818 1.9551 3.2211 2.3860
Md 30.09 30.09 30.09 lbs/MMBtu 5.977E-04 5.573E-04 9.201E-04 0.0007
Ms 28.87 29.33 29.18
Y 1.01 1.01 1.01
Cp 0.77 0.77 0.77 Total Emissions Summary w/back half condensable
Vm cf 44.50 48.16 48.55 Run 1 Run 2 Run 3 Run 4 Avg.
Vlc 93.80 60.30 72.50 gr./dscf 0.0023 0.0014 0.0007 0.0014
AVG. Tm F 44.58 49.17 55.33 lbs/hr 12.6833 8.2765 4.0482 8.3360
Vm std 39.24 42.08 41.92 lbs/MMBtu 3.825E-03 2.359E-03 1.156E-03 0.0024
Vw std 4.42 2.84 3.41
Bws 0.10 0.06 0.08
S Bws 0.40 0.30 0.34
Avg. Sqrt Dlp 1.26 1.27 1.29
Vs 76.70 76.31 77.81 F factor used
scfm wet 726581.80 737621.98 745723.31 8710
acfm 1024244.45 1019033.68 1038964.86
Qsd dscfh 39185819.65 41461072.16 41375031.37
# Sample
Points 12.00 12.00 12.00
Dn 0.145 0.145 0.145
An 1.15E-04 1.15E-04 1.15E-04
Start Time 0:00 0:00 0:00
End Time 0:00 0:00 0:00Total Test
time 120.00 120.00 120.00
Time @ point 10.00 10.00 10.00
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Points
Run 1 PxP Isokinetic
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Sample Points
Run 2 PxP Isokinetic
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
% I
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Sample Points
Run 3 PxP Isokinetic
O2
CO2
lbs/MMBtu
80.00
90.00
100.00
110.00
120.00
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
Sample Points
Run 4 PxP Isokinetic
Page 1
Run 1
PacifiCorp Currant Creek Power - CTG1A Flow & Moisture Test Date 1/7/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 162 11.70 5.50 82.80 30.09 28.87
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.4008
1.0070 0.77 44.500 93.80 44.58 39.240 4.415 0.1011 0.4008 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.257 76.70 726,582 1,024,244 3.92E+07 12 0.145 120 10.00 0.380000
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 799.000 1.80 0.38 213 43 Wt. (Final) Wt. (Initial) lc
2 803.405 1.70 0.38 112 43 500.30 426.20 74.1
3 807.300 1.90 0.38 206 44 674.20 666.30 7.9
4 811.450 1.60 0.38 207 44 781.10 779.10 2.0
5 815.225 1.50 0.38 224 44 800.90 791.10 9.8
6 818.875 1.50 0.38 114 44 0.0
7 822.800 1.70 0.38 209 44
8 826.700 1.40 0.38 160 45 Isokinetics 97.2
9 830.375 1.50 0.38 100 45 Test Date 1/7/2025
10 834.380 1.50 0.38 193 46 Start Time enter
11 838.430 1.40 0.38 100 46 End Time
12 841.985 1.50 0.38 100 47 Run 1
13 843.500
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Run 2
PacifiCorp Currant Creek Power - CTG1A Flow & Moisture Test Date 1/7/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 149 11.70 5.50 82.80 30.09 29.33
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.2966
1.0070 0.77 48.160 60.30 49 42.085 2.838 0.0632 0.2966 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.273 76.31 737,622 1,019,034 4.15E+07 12 0.145 120 10.00 0.38
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 848.400 1.80 0.38 210.0 45.0 Wt. (Final) Wt. (Initial) lc
2 852.420 2.00 0.38 100.0 45.0 551.50 482.00 69.5
3 857.040 1.80 0.38 90.0 46.0 624.20 615.40 8.8
4 861.475 1.60 0.38 200.0 46.0 616.90 648.00 -31.1
5 865.295 1.50 0.38 120.0 48.0 848.80 835.70 13.1
6 869.255 1.60 0.38 100.0 50.0 0.0
7 873.435 1.70 0.38 210.0 51.0
8 877.380 1.50 0.38 170.0 51.0 Isokinetics 98.5
9 881.195 1.40 0.38 98.0 52.0 Test Date 1/7/2025
10 885.135 1.60 0.38 209.0 52.0 Start Time
11 887.980 1.50 0.38 182.0 52.0 End Time
12 891.770 1.50 0.38 100.0 52.0 Run 2
13 896.560
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Run 3
PacifiCorp Currant Creek Power - CTG1A Flow & Moisture Test Date 1/7/2025
As ft^2 Pbar Pq (static) Ps Avg. Ts F CO2 - FCO2 O2 N2+C Md Ms
222.55 25.02 -0.50 24.98 154 11.70 5.50 82.80 30.09 29.18
Y Cp Vm cf Vlc Avg. Tm F Vm std Vw std Bws S Bws 0.3367
1.0070 0.77 48.550 72.50 55 41.918 3.413 0.0753 0.3367 0.999
Avg. Sqrt
Dlp Vs scfm wet acfm Qsd dscfh
# Sample
Points Dn
Total Test
time (minutes)
Time @ point
(minutes)Avg. Dlh
1.289 77.81 745,723 1,038,965 4.14E+07 12 0.145 120 10.00 0.38
TRUE
Point No.Meter (cf) dl "p" dl "h" ts F tm F (in) tm F (out) Imp. Liquid Collected
1 904.800 1.80 0.38 210.0 54.0 Wt. (Final) Wt. (Initial) lc
2 908.880 2.00 0.38 154.0 54.0 475.7 428.0 47.7
3 913.385 2.00 0.38 100.0 54.0 680.0 671.4 8.6
4 918.090 1.60 0.38 220.0 55.0 774.7 775.7 -1.0
5 921.925 1.60 0.38 161.0 55.0 814.7 797.5 17.2
6 925.935 1.50 0.38 98.0 56.0 0.0
7 930.030 1.70 0.38 200.0 56.0
8 934.050 1.60 0.38 150.0 56.0 Isokinetics 98.4
9 938.100 1.50 0.38 100.0 56.0 Test Date 1/7/2025
10 942.195 1.60 0.38 211.0 56.0 Start Time
11 946.060 1.60 0.38 147.0 56.0 End Time
12 950.125 1.50 0.38 100.0 56.0 Run 3
13 953.350
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