DAQ-2025-000858

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IIISUIATING SY5IEM5, TtC
Nephl t.clllty
2762 Soutlr Main Strcct
NeDhi, Utah 8.1648
1,800.GET. PrNri','
wsv.owenlc o rnlnS.com
Januarv 29,2025
REVIEV/ED -
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Division of Air Quality
Utah Department of Environmental Quality
195 North 1950 West
P,O" Box L44820
salt Lake city, UT 84116
Via Certified Mail:
Reference: Forming Sectlon Scrubbers NSPS Report
Owens Corning lnsulating Systems, LLC - Nephi Facility
Approval Order DAQE-AN 141780008-23
Period from July l,2124through December 3L,2024
To Whonr lt May Concern:
This {etter serves as the semi-annual report of deviations of required monitoring parameters for
the four Forming Section Scrubbers and the one Process Development Line Scrubber, as required
by 40 CFR 60.684(d) (Subpart PPP: Standards of Performance for Wool Fiherglass lnsulation
Manufacturing Plants). Section ll.B.2.b of Approval Order DAQE-AN141780008-23 (lssued April
6,20231provides the operating parameters to be maintained and monitored, The report period
is July L,2024 through December 31,2024.
Emissions from the bonded fiberglass insulation line are controlled by four scrubbers, and the
process development line is controlled by one scrubber. Water flow and differential pressure (dP)
monitoring deviations are summarized below.
Water Flow Monitoring Results
r Scrubber A: No Deviations.
o Scrubber B: No Deviations.
r Scrubber C: No Deviations.
o Scrubber D: No Deviations.r Process Development Line: No Deviations.
UTAH DEPANTMETVT OFqlvBgIuElIAL!uALtrY
DIVISION OF AIR QUALITY
Differential Pressure (dP) Monitorine Results
o Scrubber A: No Deviations.r Scrubber B: No Deviations,e Scrubber C: No Deviations.. Scrubber D: No Deviations.o Process Development Line: No Deviations.
Equipment calibrations are required per 40 CFR 60.683(c) and Section 1t.8.2.b.1 of Approval Order
DAQE-AN141780008-23. Calibration checks were conducted for each scrubber's flow meter
which operated in the 3'd and 4th quarters. All calibration checks were within specification, per
the manufacturer's recommendation, calibration of the dP gauges is not required.
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system deslgned to assure that qualified personnel
properly gather and evaluate the information submltted. Based on information and belief formed
after reasonable inquiry, including the person or persons who manage the system, or those
persons directly responsible for gathering the information, the stated information in this letter is
trLre) accurate and complete,
Please contact stefan Messmer at (618) 7L3-3L92 if you have any questions.
Sincerely,
Kirk Budge
Acting Plant Leader
Ovrens Corning lnsulating Systems, LLC - Nephi
Attachments
ULF Scrubber "A" Flow Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+q4
Total
No Data I O
Hleh : 0
ULF Scrubber "A" Differential Pressure Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+q4
Total Low l
Hieh
0
0
ULF Scrubber "8" Flow Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+Qa
Total
No Data 0_1._ _- _ _Lowio
Hish O
ULF Scrubber "B" Differentia! Pressure Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
ULF Scrubber "8" Differentlal Pressure: Q3 + q4 2024tt./iir., -[--zoo--l- i1-oo -i-iroo I rg:oo I zg:oo r:oo
No Data 0Q3+Q4
Total Low 0
Hieh 0
ULF Scrubber "C" Flow Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+qa
Total
i
I
0
0
___lg*_
ULF Scrubber "C" Differential Pressure Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
ULF Scrubber "C" Differentlal Pressure: Q3 + Q4 2024
oite/rime: ,l -i:oo rr:oo I rsioo isioo I 23:oo 3:00
NA
No Data ,l I
0
0
Q3+q4
Total Low
ULF Scrubber "D" Flow Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning Insulating Systems LLC
Nephi, UT
ULF Scrubber "D" Flow: Q3 + q4 2024
Date/Time: I 7:00 11:00 15:00 I rg:oo 23:00 3:00
NA
ULF Scrubber "D" Differential Pressure Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
ULF Scrubber "D" Differentlal Pressure: Q3 + Q4 2024
oaie/rime: I 7:00 11:00 I 15:oo 19:00 23:00 3:00
NA
Process Development Line (Unit 8) Flow Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+Q4
Total
No Data
Low l
0
Process Development Line (Unit 8) Differential Pressure Deviation Summary
2nd Half 2024 NSPS Semi-Annual Report
Owens Corning lnsulating Systems LLC
Nephi, UT
Q3+Q4
Total
No Data 0
Low 0
Hieh 0
UTAH DEPARTMENT OF
ENVIRONMENTAL QUALITY
FEB - 3 2025
DIVISION OF AIR OUALITY