DAQ-2025-000534

1
DAQC-081-25
Site ID 10917 (B5)

MEMORANDUM

TO: FILE – COMPASS MINERALS OGDEN, INC.

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Rob Leishman, Environmental Scientist

DATE: January 23, 2025

SUBJECT: Compass Minerals, Major, NSPS, Weber County, FRS # UT00000049005700001

INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: January 23, 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:

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
Boiler
#1 1838 NOx 98% 10/18/24 10/23/24 Boiler
#1 NOx 0.00 0.2 lb/MMBtu -
30-day
Boiler
#1 1838 O2 98% 10/18/24 10/23/24 Boiler
#2 NOx 0.00 0.2 lb/MMBtu -
30-day

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
Boiler
#2 2272 NOx 99% 10/18/24 10/25/24
Boiler
#2 2272 O2 99% 10/18/24 10/25/24

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 0 33 0 0
Boiler #1 O2 0 0 33 0 0
Boiler #2 NOx 0 0 33 0 0
Boiler #2 O2 0 0 33 0 0

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
0 Hours 134 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.

3
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
Company:Compass Minerals Corp. 
Location:Boiler
Date:10/18/24
Start Time:7:15 AM End Time:8:00 AM
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
21.40
42.20
42.40
42.30
Cylinder Gas Audit Form (CGA)
(NO) URAS 26 Analyzer
Cylinder Expiration Date
4/30/2027
4/30/2027
Analyzer 
Response 1 21.60
Certified Value (PPM)
NOx Concentration (ppm)
20.27
42.51
Cylinder Number
CC733926
CC110774
2
3
Avg.
% Diff.
PPM Diff.
21.40
21.30
21.30
42.50
42.60
21.33
‐5.25
‐1.06
21.43
‐5.74
‐1.16
42.40
0.26
0.11
42.5
0.10
0.04
21.30 42.60
Low range High Range
NOx Gas Concentration (ppm)
1212
% Diff. = (Certified Value ‐ Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value ‐ Average
Company Compass Minerals Corp. 
Location Boiler
Date 10/18/34
Start Time:8:00 AM End Time:9:25 AM
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
1212
NOx Gas Concentration (ppm)
CC254966 274.2 4/29/2032
Cylinder Gas Audit Form (CGA)
(NO) URAS 26 Analyzer
Certified Value (PPM)
272.6
2 120.7 120.6 272.4 272.6
Analyzer 
Response 1 120.5 120.6 272.4
122.9 122.9 273.3 273.3
Avg.120.7 120.6 272.4 272.7
3 120.9 120.7 272.5 272.8
% Diff. = (Certified Value ‐ Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value ‐ Average
PPM Diff.2.20 2.27 0.87 0.63
% Diff.1.79 1.84 0.32 0.23
Company Compass Minerals Corp. 
Location Boiler
Date 10/18/24
Start Time:9:25 AM End Time:10:30 AM
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
1212
(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 11.01 11.01
4.99 11.04 11.04
Analyzer 
Response 1 5.00 4.98 11.01 11.00
4.99Certified Value (PPM)
Avg.4.99 4.98 11.01 11.01
3 4.99 4.98 11.01 11.01
PPM Diff.0.00 0.01 0.03 0.03
% Diff.‐0.07 0.20 0.27 0.30
% Diff. = (Certified Value ‐ Ave.) * 100
(Certified Value)
PPM Diff. = Certified Value ‐ Average
Compass Minerals 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 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 3 2024 1838
1 110 3 2024 2272
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 1838 1.82% 33.4833 0 0 33.4833 0 0
1 TRUE 300 O2 1838 1.82% 33.4833 0 0 33.4833 0 0
1 TRUE 300 NOx 2272 1.47% 33.4833 0 0 33.4833 0 0
1 TRUE 300 O2 2272 1.47% 33.4833 0 0 33.4833 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 10/18/24 1 CC733926 04/30/27 CRM ppm 21.3 20.27 -5.25% Pass Low
1 Valid Cal. Gas 260 NOx 10/18/24 2 CC110774 04/30/27 CRM ppm 42.4 42.51 0.26% Pass High
1 Valid Cal. Gas 260 NOx 10/18/24 1 CC735852 05/17/31 CRM ppm 120.7 122.9 1.79% Pass Low
1 Valid Cal. Gas 260 NOx 10/18/24 2 CC254966 04/29/32 CRM ppm 272.4 274.2 0.32% Pass High
1 Valid Cal. Gas 260 O2 10/18/24 1 CC735852 05/31/25 ETPM % 5 4.99 -0.07% Pass Low
1 Valid Cal. Gas 260 O2 10/18/24 2 CC45753 05/29/26 ETPM % 11 11.04 0.27% Pass High
1 Valid Cal. Gas 260 NOx 10/18/24 1 CC733926 04/30/27 CRM ppm 21.4 20.27 -5.74% Pass Low
1 Valid Cal. Gas 260 NOx 10/18/24 2 CC110774 04/30/27 CRM ppm 42.5 42.51 0.10% Pass High
1 Valid Cal. Gas 260 NOx 10/18/24 1 CC735852 05/17/31 CRM ppm 120.6 122.9 1.84% Pass Low
1 Valid Cal. Gas 260 NOx 10/18/24 2 CC254966 04/29/32 CRM ppm 272.7 274.2 0.23% Pass High
1 Valid Cal. Gas 260 O2 10/18/24 1 CC735852 05/31/25 ETPM % 5 4.99 0.20% Pass Low
1 Valid Cal. Gas 260 O2 10/18/24 2 CC45753 05/29/26 ETPM % 11 11.04 0.30% 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 133.93 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 133.93 TC 300 Hours 0.00 TRUE
None Reported None Reported None Reported None Reported None Reported None Reported
Point Source
Point Source
Point Source
Point Source
Point Source
Point Source
Yes
Boiler #2
Boiler #2
Boiler #2
0
Boiler #1
Boiler #2
0
Boiler #1
Boiler #1
0
0
Boiler #2
0
0
Boiler #1
Boiler #1
Boiler #2
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
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)
Boiler #1
Boiler #2
Boiler #2
0
Boiler #1
Boiler #1
Boiler #1
Boiler #1
Boiler #1
Boiler #2
Boiler #2
Boiler #2
0
0
0
Compass Minerals 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
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 Third 2024
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
Boiler #1 NOx 10/18/24 75 20.27 15 to 22.5
Boiler #1 NOx 10/18/24 75 42.51 37.5 to 45
Boiler #1 NOx 10/18/24 500 122.9 100 to 150
Boiler #1 NOx 10/18/24 500 274.2 250 to 300
Boiler #1 O2 10/18/24 100 4.99 4 to 6
Boiler #1 O2 10/18/24 100 11.04 8 to 12
Boiler #2 NOx 10/18/24 75 20.27 15 to 22.5
Boiler #2 NOx 10/18/24 75 42.51 37.5 to 45
Boiler #2 NOx 10/18/24 500 122.9 100 to 150
Boiler #2 NOx 10/18/24 500 274.2 250 to 300
Boiler #2 O2 10/18/24 100 4.99 4 to 6
Boiler #2 O2 10/18/24 100 11.04 8 to 12
Point Source Channel Audit Date Low Span Audit Gas Used High Span Audit Gas Used
Compass Minerals 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
Compass Minerals EER 4Q2024
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 723 Grand Total
Boiler #1
NOx
Performing daily calibration of CEMS 30.08 30.08
Performing Cylinder Gas Audit of CEMS 3.40 3.40
O2
Performing daily calibration of CEMS 30.45 30.45
Performing Cylinder Gas Audit of CEMS 3.03 3.03
Boiler #2
NOx
Performing daily calibration of CEMS 30.45 30.45
Performing Cylinder Gas Audit of CEMS 3.03 3.03
O2
Performing daily calibration of CEMS 30.45 30.45
Performing Cylinder Gas Audit of CEMS 3.03 3.03
Grand Total 133.93 133.93
Compass Minerals 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
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 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 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