DAQ-2025-001068

1
DAQC-164-25
Site ID 10007 (B5)

MEMORANDUM

TO: FILE – HOLCIM (US) INCORPORATED – Devil’s Slide

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Rob Leishman, Environmental Scientist

DATE: February 11, 2025

SUBJECT: Holcim USA Incorporated (Holcim), Major, Title V, MACT, NSPS, Weber County,
FRS # UT00000049002900001

INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: February 11, 2025

SOURCE LOCATION: Devil’s Slide/Weber County

SOURCE CONTACT: Mark Miller – Director of Land and Environment –
972-221-4646
Javier Sosa – Plant Manager – 801-829-6821

APPLICABLE
REGULATIONS: Title V Operating Permit
PERMIT NUMBER: 2900001004
DATE OF PERMIT: November 18, 2021
Date of Last Revision: March 25, 2022

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
Holcim’s relative accuracy performance specification test review
memorandum.

SOURCE REVIEW 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
Kiln 2043 THC 99% RATA Completed 11/20/24 Kiln NOx 0.00 -
Kiln 2043 HCl 100% 11/05/24 05/02/24 Kiln SO2 0.00 -

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
Kiln 2043 O2 100% 11/08/24 07/18/24 Kiln SO2 0.00 -
Kiln 2043 NOx 99% 11/05/24 07/18/24 Kiln HCl 0.00 -
Kiln 2043 SO2 99% 11/05/24 07/18/24 Kiln THC 0.00 -
Kiln 2043 CO2 100% 11/05/24 07/18/24 Kiln Hg 0.00 -
Kiln 2043 Hg 99% 10/09/24 07/18/24

Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
Kiln NOx 0 0 0 0 0
Kiln SO2 0 0 0 0 0
Kiln SO2 0 0 0 0 0
Kiln HCl 0 0 0 0 0
Kiln THC 0 0 0 0 0
Kiln Hg 0 0 0 0 0

CMS Performance Summary - Hourly Summary
Point
Source Channel Monitor
Malfunction
Non-monitor
Malfunction
QA
Calibrations
Other
Known
Causes
Unknown
Causes
Kiln THC 3 0 8 13 0
Kiln HCl 3 0 4 3 0
Kiln O2 0 0 6 3 0
Kiln NOx 3 0 23 3 0
Kiln SO2 3 0 23 3 0
Kiln CO2 3 0 4 3 0
Kiln Hg 11 0 7 0 0

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
0 Hours 129 Hours 0 Hours 0 Events

3
SOURCE INSPECTION
SUMMARY EVALUATION: Holcim is maintaining its COMS as required in R307-170 and 40
CFR 603. Cylinder gas audits were conducted as required.

CURRENT
RECOMMENDATIONS: Deviations appear to be a result of 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.” Holcim
was in compliance during this reporting period. No further
enforcement actions should be taken. Holcim’s NSPS monitoring
system meets the performance standards of 40 CFR 60, Appendix B,
Performance Specifications.

HIGH PRIORITY
VIOLATOR (HPV): Yes, due to prior violations which haven’t been settled as of this date.

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
Holcim 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
Contact1 100 Javier Sosa Ortiz 02900001 801-829-2122 Clinton Badger
1 100 0 0 0 0
1 Type Code 110(Point Source Identification)Type Code Point Source
Quarter1 - 4 Year Point Source
Operating Hrs. in
Quarter
1 110 4 2024 2043
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 Location1 200 CO2 ABB ACF5000 3.368022.6 0 30 Nov. 16 Stack
1 200 HCl ABB ACF5000 3.368022.6 0 20 Nov. 16 Stack
1 200 Hg Tekran 3310Xi 3122 0 20 Nov. 16 Stack
1 200 NOx ABB ACF5000 3.368022.6 0 1000 Nov. 16 Stack
1 200 O2 ABB ACF5000 3.368022.6 0 25 Nov. 16 Stack
1 200 SO2 ABB ACF5000 3.368022.6 0 325 Nov. 16 Stack
1 200 THC ABB AO2020 248861242 0 60 Oct. 24 Stack
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 Period1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0 0 0
1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0 0 0
1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0 0 0
1 TRUE 310 HCl 0 0.00% 0 0 0 0 0 0 0 0
1 TRUE 310 THC 0 0.00% 0 0 0 0 0 0 0 0
1 TRUE 310 Hg 0 0.00% 0 0 0 0 0 0 0 0
1 310 0 0 0 0 0 0 0 0 0
1 Type Code 300 (CMSPerformance 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 Causes1 TRUE 300 THC 2043 1.17% 24 3 0 8 13 0
1 TRUE 300 HCl 2043 0.49% 10 3 0 4 3 0
1 TRUE 300 O2 2043 0.44% 9 0 0 6 3 0
1 TRUE 300 NOx 2043 1.42% 29 3 0 23 3 0
1 TRUE 300 SO2 2043 1.42% 29 3 0 23 3 0
1 TRUE 300 CO2 2043 0.49% 10 3 0 4 3 0
1 TRUE 300 Hg 2043 0.88% 18 11 0 7 0 0
1 300 0 0 0 0 0 0
1 Type Code 250
(Performance SpecificationRATA 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
1 324 Days 250 Hg 07/18/24 08/29/23 10 wscm 1.068 1.431 0.49% 0
1 Late 250 HCl 05/02/24 11/01/22 18 ppm 4.11 3.97 4.93% 0
1 125 Days 250 THC 11/20/24 07/18/24 4 ppmw 22.778 25.11 12.52% 0
1 364 Days 250 NOx 07/18/24 07/20/23 11 ppmw 282.367 293.751 5.63% 0
1 364 Days 250 O2 07/18/24 07/20/23 11 0 9.256 10.256 10.40% 0
1 364 Days 250 SO2 07/18/24 07/20/23 11 lb/hr 3.556 4.159 0.27% 0
1 364 Days 250 CO2 07/18/24 07/20/23 11 0 15.578 14.922 5.66% 0
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 CO2 11/05/24 1 CC142824 11/30/29 EPA P1 % 7.83 7.48 4.63% P Low
1 Valid Cal. Gas 260 CO2 11/05/24 2 CC365043 05/04/28 EPA P1 % 17.06 16.52 3.28% P High
1 Valid Cal. Gas 260 HCl 11/05/24 1 CC515631 04/17/26 EPA P1 ppm 4.95 4.98 0.64% P Low
1 Valid Cal. Gas 260 HCl 11/05/24 2 CC513769 01/15/26 EPA P1 ppm 10.88 11.29 3.64% P High
1 Valid Cal. Gas 260 Hg 10/09/24 1 3310 Xi N/A NIST µg 5.26 4.94 6.55% P Low
1 Valid Cal. Gas 260 Hg 10/09/24 2 3310 Xi N/A NIST µg 11.22 10.7 4.88% P High
1 Valid Cal. Gas 260 NOx 11/05/24 1 CC142824 11/30/29 EPA P1 ppm 254.99 252.4 1.03% P Low
1 Valid Cal. Gas 260 NOx 11/05/24 2 CC174579 05/04/28 EPA P1 ppm 563.33 561.3 0.36% P High
1 Valid Cal. Gas 260 O2 11/08/24 1 ALM025754 02/04/29 EPA P1 % 5.2 5.07 2.62% P Low
1 Valid Cal. Gas 260 O2 11/08/24 2 EB025754 09/04/27 EPA P1 % 10.93 10.97 0.38% P High
1 Valid Cal. Gas 260 SO2 11/05/24 1 CC365043 05/04/28 EPA P1 ppm 77 81 4.94% P Low
1 Valid Cal. Gas 260 SO2 11/05/24 2 CC142824 11/30/29 EPA P1 ppm 174.68 179.8 2.85% P High
1 Expired Cal. Gas 260 THC RATA Completed 1 N/A N/A ppm N/A N/A N/A P Low
1 Expired Cal. Gas 260 THC RATA Completed 2 N/A N/A ppm N/A N/A N/A P 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
Low
1 270 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 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 129.00 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 129.00 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
Kiln
Kiln
Kiln
Kiln
Kiln
0
Kiln
0
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
0
Kiln
Kiln
Kiln
Type Code 550
(Changes in Operation in
Control Equipment When
CEM Data Not Available)
Type Code 500(Boiler Operating Daysw/o 18 Hours of Data)
Holcim US Inc.
0
Type Code 450
(Data Excluded)
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
0
Kiln
0
Kiln
Kiln
Type Code 210(Pollutant ConcentrationExceeded Span of CEM)
Type Code 220(Monitor OutageDuring 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)
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
Kiln
0
0
0
Holcim 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
Kiln Hg 07/18/24 08/29/23 10 wscm 1.068 1.43 0.49%
Kiln HCl 05/02/24 11/01/22 18 ppm 4.11 3.97 4.93%
Kiln THC 11/20/24 07/18/24 4 ppmw 22.778 25.11 12.52%
Kiln NOx 07/18/24 07/20/23 11 ppmw 282.367 293.75 5.63%
Kiln O2 07/18/24 07/20/23 11 9.256 10.26 10.40%
Kiln SO2 07/18/24 07/20/23 11 lb/hr 3.556 4.16 0.27%
Kiln CO2 07/18/24 07/20/23 11 15.578 14.92 5.66%
*
NSPS CGA Fourth 2024
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
Kiln CO2 11/5/24 30 7.48 5 to 8
Kiln CO2 11/5/24 30 16.52 10 to 14
Kiln HCl 11/5/24 20 4.98 10 to 12
Kiln HCl 11/5/24 20 11.29 16 to 24
Kiln Hg 10/9/24 20 4.94 4 to 6
Kiln Hg 10/9/24 20 10.7 10 to 12
Kiln NOx 11/5/24 1000 252.4 200 to 300
Kiln NOx 11/5/24 1000 561.3 500 to 600
Kiln O2 11/8/24 25 5.07 4 to 6
Kiln O2 11/8/24 25 10.97 8 to 12
Kiln SO2 11/5/24 325 81 65 to 97.5
Kiln SO2 11/5/24 325 179.8 162.5 to 195
Kiln THC RATA Completed 60 N/A 12 to 18
Kiln THC RATA Completed 60 N/A 12 to 18
Point Source Channel Audit Date Low Span Audit Gas Used High Span Audit Gas Used
Holcim 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
Holcim EER 4Q2024
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 723 724 721 Grand Total
Kiln
NOx
Daily Calibration 23.0 23.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 3.0 3.0
SO2
Daily Calibration 23.0 23.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 3.0 3.0
O2
Daily Calibration 2.0 2.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 3.0 3.0
Preventative Maintenance 1.0 1.0
CO2
Daily Calibration 4.0 4.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 3.0 3.0
HCl
Daily Calibration 4.0 4.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 3.0 3.0
THC
Daily Calibration 6.0 6.0
THC monitor replacement causing adjacent monitor downtime 3.0 3.0
Monitor Anomaly / Malfunction 8.0 8.0
Preventative Maintenance 2.0 2.0
Monitor Replacement 5.0 5.0
Hg
Daily Calibration 7.0 7.0
Monitor Anomaly / Malfunction 11.0 11.0
Grand Total 72.0 23.0 34.0 129.0
Holcim EER 4Q2024
SO2 *
SO2 Type Code 410 (SO2) - 6000 (All)
SO2 *
SO2 Count of Magnitude of Emissions Column Labels
SO2 Row Labels Grand Total
SO2 Grand Total
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
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
VOC/THC *
VOC/THC Type Code 460 (VOC/THC) - 6000 (All)
VOC/THC *
VOC/THC Count of Magnitude of Emissions Column Labels
VOC/THC Row Labels Grand Total
VOC/THC 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
Hg *
Hg Type Code 480
(Hg Mercury) - 6000 (All)
Hg *
Hg Count of Magnitude of Emissions Column Labels
Hg Row Labels Grand Total
Hg Grand Total
HCl *
HCl Type Code 401
HCl - 6000 (All)
HCl *
HCl Count of Magnitude of Emissions Column Labels
HCl Row Labels Grand Total
HCl Grand Total
Holcim 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