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Home My WebLink AboutDAQ-2024-004455RiOTintO Rio rinto Kennecott Utah Gopper, LLC 4700 Daybreak Parl$vay South Jordan, Utah 84009 Mr. Bryce Bird - Director Department of Environmental Quality Division of Air Quality P.O. Box'144820 Salt Lake City, Utah 841144820 January 19,2024 Attn: Joe Randolph Dear Mr. Bird RE: Smelter Monthlv Report - December 2023 Rio Tinto Kennecott Utah Gopper LLC (KUC) is submitting this letter in compliance with Approval Order (AO) number DAQE-ANO 1 03460062-23 and Title V Operating Permit Oitle V) Number 3500030004. lncluded herein is the monthly KUC Smelter monthly report for December 2023. The following sections present data related to the Holman Boiler, Main Stack particulate and lead emissions, and Main Stack gas flow. Holman Boiler The Holman Boiler 30-day average NOx emissions are measured as outlined in the most recently approved monitoring plan in accordance with AO condition ll.B.2.b and Title V condition 11.8.23.b.1. The information provided in Table 1 is required to be reported monthly. Table 1: Holman Boiler Data LTTAH DEPARTMENT OF ENVIRONMENTAL OUATITY JAN ',l I ?C24 DIVISION OF AIH QUALIT\.' HandDel.iverd Were the 30-day average NOx emissions greater than 9.34 lbs/hr durino the oeriod?N/A Were the 30-day average 02 levels greater than 3.3% during the oeriod?N/A** Were the Holman Boiler data recovery requirements met during the period? "N/A* Rio Tinto Konn6cotl Lnah Copp€r, LLC. 4700 Daybrsak Parhray, South Jordan, Ulah 8rrc09. REVIEWED Initials JBR Date 2/5/2024 Comp Status Meets File # 10346 Blue 2 RioTinto Rio Tinto Kennecott Utah Copper, LLC 4700 Daybreak Parlorvay South Jordan, Utah &4009 Main Stack Particulate Matter (PMl0) and Lead (Pb) Emissions Notes: " For compliance with data recovery requirements, a minimum of 75% of the operating hours in each operating day must be achieved in at least 22 o130 successive operating days. '* The planned Holman burner replacement is still ongoing. Once the burner replacement project is complete, KUC willcomplete stack testing to determine a new oxvoen limit for the new burner able 2: Main Stack Particulate and Lead Emissions Date Main Stack Particulate (lbs/h0 Main Stack Lead (lbs/hr) 12t',U2023 17.3 0.1 1212t2023 11.5 0.0 1213t2023 5.9 0.0 12t4t2023 0.5' 12t5t2023 0.5* 12t6t2023 0.5' 12nt2023 0.5* 12t8t2023 0.5' 12t9t2023 0.5* 12t10t2023 0.5* 12t11t2023 0.5* 12t12t2023 0.5* 12t1312023 7.0 0.5 12t14t2023 18.7 0.2 12t15t2023 54.5 0.4 12t16t2023 68.7 0.6 12t17t2023 20.8 0.1 12t18t2023 59.2 0.5 1?/19t2023 43.2 0.2 12t20t2023 10.3 0.7 12121t2023 5.0 0.3 12122t2023 16.0 0.7 12123t2023 14.7 1.0 '1212412023 15.7 0.8 12t25t2023 22.1 0.9 12t26t2023 22.2 0.5 12127t2023 t 0.5* Rio Tinto K€nnecott l,nah Copper, LLC. 4700 Oaybroak Parlsay, South Jtrdan, Utah 84009. RioTinto Rio Tinto Kennecott Utah Copper, LLC 4700 Daybreak Parkway South Jordan, Utah &4009 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 permit limit of 89.5 lbs/hr as set forth in AO condition ll.B.1.a (H) and Title V condition ll.B.24.a (i). Table 3 summarizes the Main Stack particulate and lead emissions annual data calculations. 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 11.8.24.d. Main Stack Gas Flow ln accordance with AO condition 11.B.3.a.6, main stack gas flow may be estimated in the event that temperature and velocity measurements malfunction. Table 4 summarizes the instances when main stack gas flow was estimated. Table 4: Main Stack Gas Flow Estimates Number of instances when main stack gas flow was estimated during the period:Zero (0) 12t28t2023 0.5* 12129t2023 22.7 1.1 12t30t2023 20.5 0.8 12t31t2023 19.6 0.7 Notes: Eleven samples were invalidated for particulate and lead emissions for lhe month: December 4u,, 5r', 6t , 7th , 8th, gth,1 Oth,1 1h, and 12h were invalidated lue to work on the Main Stack elevator. December 27th and 28h were invalidated Jue to procedural errors (per section 6.6.3 of the Monitoring Plan). The monthly average value for lead is substituted on these days for calculating the annual average per the plan. able 3: Main Stack Annual Particulate Emissions Data Recovery*81.1% Lead Emissions (Annual Average)0.2 lbs/hr Lead Emissions Data Recovery*80.1o/o Notes: + - Data recovery percentages are to be compared with the 80% data recovery requirement outlined in the most recently approved monitorinq plan. Rio Tinto Kennocott Lnah Copper, LLC. 4700 Oaybreak Parloay, South Jodan, Utah 84009. RioTinto Rio Tlnto Kennecott Utah Copper, LLC 4700 Daybreak Pad$ay South Jordan, Utah 84009 Based on information and belief formed after reasonable inquiry, the statements and information in this document are true, accurate, and complete (R307-41 Ssd). lf you have any questions regarding this report, please contact me or Sean Daly at 801-204-2563. Jerome Dozol General Manager - JAN 1 I 2024 Yours sincerelv. crra Fa'\ttotu*+a !4,rry*ra tFrriD I offruorrg Rio Tinto Kenn€cott l.riah Copper, LLC. 4700 Dayb.sak Parlsay, South Jordan, Ln6h 84009.