DAQ-2025-000043

RiOTintO Rro nnro Kenn.con utrh coppor, LLc
4700 Daykeak Parkway
South Jordan, Utah 84009
Mr. Bryce Bird - Director
Department of Environmental Quality
Division of Air Quality
P.O. Box 144820
Salt Lake City, Utah 8/.1144820
October 16,2024
Attn:Joe Randolph
Dear Mr. Bird
RE: Smelter Monthlv Reoort - September 2024
Rio Tinto Kennecott Utah Copper LLC (KUC) is submitting this letter in
compliance with Approval Order (AO) number DAQE-AN0103460062-23
and Title V Operating Permit (Title V) Number 3500030004. lncluded
herein is the monthly KUC Smelter monthly report for September 2024.
The following sections present data related to the Main Stack particulate
and lead emissions.
Main Stack Particulate Matter (PM10) and Lead (Pb) Emissions
Particulate and lead emissions are measured and calculated in
accordance with the most recently approved monitoring plan. Table 2
summarizes the daily particulate and lead emissions data. The daily main
stack particulate emissions are to be compared with the pennit limit of
89.5 lbs/hr as set forth in AO condition ll.B.1.a (H) and Title V condition
11.B.24.a (i).
UTAH DEPARTMTTW OT
ENVIBONMENTAL OUAUTY
OcI 1 B 2024
lland Delrv ered
DMSION OF AIR OIJAt.flY
Rio Tlnb Komc.[t Lnrh Copprr. 11C.4700 Oeyboak Psrtmy, SqJth Jordan, Utah 81009.
REVIEWED
Initials JBR Date 7/8/2024
Comp Status Meets
File # 10346 Blue 2
pb reading was typo per KUC
RioTinto RloTlnto Krnnrcott Ut h Copp.r, LLC
4700 Daybreak Parhf,ay
South Jordan, Utah 84009
able 2: Main Stack Dally Particulate and -ead Emlsslons
Date Main Stack Particulate
(lbs/hr)
Main Stack Lead
(lbs/hr)
911t2024 o.6*
91212024 o.6*
91312024 1().o o.o
91412024 29.g o.1
9t5t2024 31.2 o.1
9t6t2024 z6.z o.2
9nn024 28.8 o.2
9t8t2024 36.6 o.2
9t912024 at.4 o.2
9t10t2024 ro.8 o.1
911112024 6x.z o.8
911212024 so.7 1.O
9t13t2024 51.1 o.7
911412024 8r.s 4.L
9t15t2024 42.7 1.1
911612024 as.8 1.1
911712024 29.4 o.3
9t18t2024 ':24..O o.6
9t19t2024 r8.s o.5
9120t2024 2().o o.4
912112024 5,7 o.4
912212024 2r.4 o.7
9t23t2024 L5.2 o.4
9124t2024 11.2 o.3
9t25t2024 t.6.2 o.2
9t26t2024 18.z o.6
912712024 29,.2 o,4
st2812024 z6.s o.4
Rb nnb Kmmott Utrh Copfs, LLC.4700 Deybuk Padffiy, Sqnh Jodrn. t,tlh e(Xrg
RioTinto Rlo Tlnto Kennecofr Utrh Copper, LLC
4700 Daykeak Parhray
South Jordan, Utah 84009
The Main Stack particulate and lead emissions annual data calculations
are summarized in Table 3. This includes recovery percentages for
particulate and lead emissions samples and the annual average lead
emissions. The lead annual average emissions are to be compared with
the permit limit of 1.3 lbs/hr as set forth in AO condition ll.B.1.a (H) and
Title V condition 1l.8.24.d.
Table 3: Maln Stack Annual
Particulate Emissions Data Recoverf 72.1o/o
Lead Emissions (Annual Average)0.5lbs/hr
Lead Emissions Data Recovery*72.1o/o
Notes:
+ - Data recovery percentages are to be compared with the 80% data recovery
reouirement outlined in the most recenflv aooroved monitorino olan.
Based on information and belief formed after reasonable inquiry, the
statements and information in this document are true, accurate, and
complete (R307-4 1 5-5d).
lf you have any questions regarding this report, please contact me or Sean
Daly at 801-204-2563.
Yours sincergllq
)---'h..r/" / -//'*^nrK, 2o 5 L,uta^,/ ru, llttL,
General Manager - Metals
912912024 ro.8 o.4
913012024 2.1 o.7
Notes: Two samples from September 1d- 2dwere invalidated due to ongoing
stack probe sampling hardware issues. The stack probe sampling hardware
ssues was resolved on September 3,2024.
Rio Tlnb Kffmod Ulah Copp.r, LLC. 4700 Da!/6.r.k P.ltHy, Sdrtt| Jddin, t t h 8a00e.