DAQ-2025-002464

1
DAQC-429-25
Site ID 10917 (B5)
MEMORANDUM

TO: FILE – COMPASS MINERALS

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Rob Leishman, Environmental Scientist

DATE: May 6, 2025

SUBJECT: Compass Minerals, Major, NSPS, Weber County, FRS # UT0000004905700001
INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: May 6, 2025

SOURCE LOCATION: Castle Dale/Emery County

SOURCE CONTACT: Ian Wright – 385-566-8278

APPLICABLE
REGULATIONS: Title V Operating Permit
Permit Number: 5700001004
Date of Permit: June 10, 2021
Date of Last Revision: December 15, 2023

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 Compass
Minerals relative accuracy performance specification test review
memorandum.

SEDR Review:

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
Boiler
#1 2101 NOx 98% 02/25/25 10/23/24 Boiler
#1 NOx 0.00 0.2 lb/MMBtu -
30-day
Boiler
#1 2101 O2 98% 02/25/25 10/23/24 Boiler
#2 NOx 0.00 0.2 lb/MMBtu -
30-day
Boiler
#2 2120 NOx 98% 02/25/25 10/25/24
Boiler
#2 2120 O2 98% 02/25/25 10/25/24

1 8 2

2
Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
Boiler #1 NOx 0 0 0 0 0 0.2 lb/MMBtu - 30-day
Boiler #2 NOx 0 0 0 0 0 0.2 lb/MMBtu - 30-day

CMS Performance Summary - Hourly Summary
Point
Source Channel Monitor
Malfunction
Non-monitor
Malfunction
QA
Calibrations
Other
Known
Causes
Unknown
Causes
Boiler #1 NOx 0 1 36 0 0
Boiler #1 O2 0 1 36 0 0
Boiler #2 NOx 0 1 36 0 0
Boiler #2 O2 0 1 36 0 0

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
0 Hours 149 Hours 0 Hours 0 Events

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

CURRENT
RECOMMENDATIONS: All deviations appear to be a result of a planned shutdown, breakdown,
or process related problems that do not warrant issuing a violation.
Periods of excess emissions that were recorded by the CMS in service on
each point source during this reporting period are summarized in the
SEDR and described in Pivot Table 400 “Excess Emissions Review.”

Compass Minerals was in compliance during this reporting period. No
further enforcement actions should be taken.

Compass Minerals NSPS monitoring system meets the performance
standards of 40 CFR 60, Appendix B Performance Specifications.

HIGH PRIORITY
VIOLATOR (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

Compass Minerals
765 N 10500 W
Ogden, UT 84404
www.compassminerals.com
T [phone]

April 24th, 2025

Mr. Bryce Bird
Utah Division of Air Quality
195 North 1950 West
Salt Lake City, Utah 84116

RE: State Electronic Data Report
Compass Minerals Ogden Inc. (Operating Permit No. 5700001004)

Mr. Bird,

Enclosed please find the State Electronic Data Report for Compass Minerals Ogden Inc. for the first
quarter of 2025, as required by Section II.B.20.d.3 of Operating Permit 5700001004. This report was
submitted electronically earlier to Rob Leishman of the Utah Division of Air Quality. The intent of this
letter is to certify the contents of that electronic submittal.

Please contact Ian Wright ([e-mail], [phone]) if you have any questions
regarding the information provided.

In accordance with Operating Permit provision I.K and UAC R307-415-5.d, and based on information and
belief formed after reasonable inquiry, I certify that the statements and information in the electronic file
submitted to the Utah Division of Air Quality (see attached printout for reference) are true, accurate,
and complete.

Respectfully,
Ken Potts
Plant Manager
Compass Minerals Ogden Inc.

Enclosures:
1. 2025 1Q State Electronic Data Report
2. 2025 1Q Calibration Gas Audit
Compass Minerals EER 1Q2025
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 Ken Potts 05700001 801 566 8278 Ian Wright
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
Quarter1 110 1 2025 2101
1 110 1 2025 2120
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 NOx ABB URAS 26 Analyzer 0241708662/100075 500 3/1/2013 Boiler MMC
1 200 O2 ABB Magnos 206 Analyzer0242165372/10000 100 12/13/2013 Boiler MMC
1 200 NOx ABB URAS 26 Analyzer 0241708662/100075 500 3/1/2013 Boiler MMC
1 200 O2 ABB Magnos 206 Analyzer0242165372/10000 100 12/13/2013 Boiler MMC
1 200 0 0 0 0 0 0 1/0/1900 0
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 0.2 lb/MMBtu 30-day
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.2 lb/MMBtu 30-day
1 310 0 0 0 0 0 0 0 0 0
1 310 0 0 0 0 0 0 0 0 0
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 2101 1.77% 37.283 0 1.4833 35.8 0 0
1 TRUE 300 O2 2101 1.77% 37.283 0 1.4833 35.8 0 0
1 TRUE 300 NOx 2120 1.76% 37.283 0 1.4833 35.8 0 0
1 TRUE 300 O2 2120 1.76% 37.283 0 1.4833 35.8 0 0
1 300 0 0 0 0 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
1 379 Days 250 NOx 10/23/24 10/10/23 12 lb/MMBtu 0.008 0.009 0.56% Pass
1 379 Days 250 O2 10/23/24 10/10/23 12 vol 5 4.911 2.33% Pass
1 380 Days 250 NOx 10/25/24 10/11/23 12 lb/MMBtu 0.008 0.008 0.00% Pass
1 380 Days 250 O2 10/25/24 10/11/23 12 vol 5.511 5.5 0.67% Pass
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 NOx 02/25/25 1 CC733926 04/30/27 CRM ppm 20.8 20.27 -2.78% Pass Low
1 Valid Cal. Gas 260 NOx 02/25/25 2 CC110774 04/30/27 CRM ppm 42.2 42.51 0.73% Pass High
1 Valid Cal. Gas 260 NOx 02/25/25 1 CC735852 05/17/31 CRM ppm 120.2 122.9 2.17% Pass Low
1 Valid Cal. Gas 260 NOx 02/25/25 2 CC254966 04/29/32 CRM ppm 270.5 274.2 1.04% Pass High
1 Valid Cal. Gas 260 O2 02/25/25 1 CC735852 05/31/25 ETPM % 5 4.99 0.00% Pass Low
1 Valid Cal. Gas 260 O2 02/25/25 2 CC45753 05/29/26 ETPM % 11 11.04 0.33% Pass High
1 Valid Cal. Gas 260 NOx 02/25/25 1 CC733926 04/30/27 CRM ppm 20.7 20.27 -1.96% Pass Low
1 Valid Cal. Gas 260 NOx 02/25/25 2 CC110774 04/30/27 CRM ppm 42.2 42.51 0.65% Pass High
1 Valid Cal. Gas 260 NOx 02/25/25 1 CC735852 05/17/31 CRM ppm 119.7 122.9 2.60% Pass Low
1 Valid Cal. Gas 260 NOx 02/25/25 2 CC254966 04/29/32 CRM ppm 270.3 274.2 1.10% Pass High
1 Valid Cal. Gas 260 O2 02/25/25 1 CC735852 05/31/25 ETPM % 5 4.99 0.40% Pass Low
1 Valid Cal. Gas 260 O2 02/25/25 2 CC45753 05/29/26 ETPM % 11 11.04 0.36% Pass High
1 260 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0
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
Low1 270 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0
1 270 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0
1 Type Code 210
(Pollutant ConcentrationExceeded Span of CEM)Type Code Channel Start Date Start Time End Date End Time Hours
1 0 210 0 1/0/00 0:00 1/0/00 0:00
1
1 None Reported
1 0 TC 220 Hours 149.13 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 149.13 TC 300 Hours 0.00 TRUE
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)
Compass Mineral Ogden Inc.
0
Type Code 450
(Data Excluded)
Boiler #1
Boiler #1
Boiler #2
Boiler #2
0
0
Boiler #1
Boiler #2
Boiler #1
Boiler #2
Boiler #2
Boiler #1
Boiler #2
0
Boiler #1
Boiler #1
0
0
Boiler #2
0
0
Boiler #1
Boiler #1
Boiler #2
0
Boiler #1
Point Source
Yes
Boiler #2
Boiler #2
Boiler #2
0
0
0
0
Point Source
Point Source
Point Source
Point Source
Point Source
Boiler #1
Boiler #1
Boiler #1
Boiler #1
Boiler #2
Boiler #2
Boiler #2
None ReportedNone Reported None Reported None Reported None Reported None Reported
Compass Minerals EER 1Q2025
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
Boiler #1 NOx 10/23/24 10/10/23 12 lb/MMBtu 0.008 0.01 0.56% Pass
Boiler #1 O2 10/23/24 10/10/23 12 vol 5 4.91 2.33% Pass
Boiler #2 NOx 10/25/24 10/11/23 12 lb/MMBtu 0.008 0.01 0.00% Pass
Boiler #2 O2 10/25/24 10/11/23 12 vol 5.511 5.50 0.67% Pass
*
NSPS CGA First 2025
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
Boiler #1 NOx 2/25/25 75 20.27 15 to 22.5
Boiler #1 NOx 2/25/25 75 42.51 37.5 to 45
Boiler #1 NOx 2/25/25 500 122.9 100 to 150
Boiler #1 NOx 2/25/25 500 274.2 250 to 300
Boiler #1 O2 2/25/25 100 4.99 4 to 6
Boiler #1 O2 2/25/25 100 11.04 8 to 12
Boiler #2 NOx 2/25/25 75 20.27 15 to 22.5
Boiler #2 NOx 2/25/25 75 42.51 37.5 to 45
Boiler #2 NOx 2/25/25 500 122.9 100 to 150
Boiler #2 NOx 2/25/25 500 274.2 250 to 300
Boiler #2 O2 2/25/25 100 4.99 4 to 6
Boiler #2 O2 2/25/25 100 11.04 8 to 12
High Span Audit Gas UsedPoint Source Channel Audit Date Low Span Audit Gas Used
Compass Minerals EER 1Q2025
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
Compass Minerals EER 1Q2025
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 723 722 Grand Total
Boiler #1
NOx
Performing daily calibration of CEMS 32.13 32.13
Historian Server Crash 1.48 1.48
Performing Cylinder Gas Audit of CEMS 3.67 3.67
O2
Performing daily calibration of CEMS 32.13 32.13
Historian Server Crash 1.48 1.48
Performing Cylinder Gas Audit of CEMS 3.67 3.67
Boiler #2
NOx
Performing daily calibration of CEMS 32.13 32.13
Historian Server Crash 1.48 1.48
Performing Cylinder Gas Audit of CEMS 3.67 3.67
O2
Performing daily calibration of CEMS 32.13 32.13
Historian Server Crash 1.48 1.48
Performing Cylinder Gas Audit of CEMS 3.67 3.67
Grand Total 143.20 5.93 149.13
Compass Minerals EER 1Q2025
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
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
Compass Minerals EER 1Q2025
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 NOx Grand Total
Boiler #1
8710 1 1
Boiler #2
8710 1 1
Grand Total 2 2
*
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
Company:Compass Minerals Corp.
Location:Boiler
Date:2/25/25
Start Time:8:35AM End Time:9:35AM
Stream
Criteria:
15% +/- of the average audit value (analyzer response) or +/- 5 PPM, whichever is greater
40 CFR 60, Appendix F, section 5.2.3(2)
20.27 20.27 42.51 42.51
20.60
42.30
42.20
42.20
Cylinder Gas Audit Form (CGA)
(NO) URAS 26 Analyzer
Cylinder Expiration Date
4/30/2027
4/30/2027
Analyzer
Response 1 20.80
Certified Value (PPM)
NOx Concentration (ppm)
20.27
42.51
Cylinder Number
CC733926
CC110774
2
3
Avg.
% Diff.
PPM Diff.
20.60
21.00
20.90
42.20
42.30
20.83
-2.78
-0.56
20.67
-1.96
-0.40
42.20
0.73
0.31
42.2
0.65
0.28
20.60 42.10
Low range High Range
NOx Gas Concentration (ppm)
1 2 1 2
% Diff. = (Certified Value - Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value - Average
Company Compass Minerals Corp.
Location Boiler
Date 2/25/2025
Start Time:9:30AM End Time:10:50AM
Stream
Criteria:
15% +/- of the average audit value (analyzer response) or +/- 5 PPM, whichever is greater
40 CFR 60, Appendix F, section 5.2.3(2)
Cylinder Number NOx Concentration (ppm)Cylinder Expiration Date
CC735852 122.9 5/17/2031
Low range High Range
1 2 1 2
NOx Gas Concentration (ppm)
CC254966 274.2 4/29/2032
Cylinder Gas Audit Form (CGA)
(NO) URAS 26 Analyzer
Certified Value (PPM)
270.4
2 119.9 119.7 270.4 270.3
Analyzer
Response 1 121.1 119.8 270.5
122.9 122.9 273.3 273.3
Avg.120.2 119.7 270.5 270.3
3 119.7 119.6 270.5 270.2
% Diff. = (Certified Value - Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value - Average
PPM Diff.2.67 3.20 2.83 3.00
% Diff.2.17 2.60 1.04 1.10
Company Compass Minerals Corp.
Location Boiler
Date 2/25/25
Start Time:10:50AM End Time:12:00PM
Stream
Criteria:
15% +/- of the average audit value (analyzer response) or +/- 5 PPM, whichever is greater
40 CFR 60, Appendix F, section 5.2.3(2)
O2 Concentration (vol%)
Low range High Range
1 2 1 2
(O2) Magnos 206 Analyzer
Cylinder Gas Audit Form (CGA)
Cylinder Number O2 Concentration (vol%)Cylinder Expiration Date
CC234826 4.99 5/31/2025
CC45753 11.04 5/29/2026
2 4.99 4.98 11.00 11.00
4.99 11.04 11.04
Analyzer
Response 1 4.99 4.98 11.00 11.00
4.99Certified Value (PPM)
Avg.4.99 4.97 11.00 11.00
3 4.99 4.95 11.01 11.00
PPM Diff.0.00 0.02 0.04 0.04
% Diff.0.00 0.40 0.33 0.36
% Diff. = (Certified Value - Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value - Average