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Home My WebLink AboutDAQ-2025-000030IJSry- US Magnesium LLC 238 North 2200 West - Salt Lake City, UT 84116-2921 80't I 532-2043 - 800 t 262-9624 - FACS I M I L E 80 1 t 5U-1 407 orpRn rn,tr rl r oF ENVIHONMENIAL QUALITY Certified Mail October '1,2024 Mr. Bryce Bird, Director Division of Air Quality Utah Department of Environmental Quality 150 North 1950 West P.O. Box 144820 Salt Lake City, Utah 84114 ocl - I 2024 DIVISION OF AIN OI,JALITY RE: Title V Six Month Monitoring Report - US Magnesium, LLC, Rowley Facility, Operating Permit No. 4500030003 Dear Mr. Bird, Please find enclosed the Title V Six Month Monitoring Report for the US Magnesium, LLC facility located at Rowley, Utah. This report covers the period from April 1,2024 to September 30,2024 for Operating Permit # 4500030003. lf you have any questions or require additiona! information, please feel free to contact me at (801) 532-1522. Sincerely,/ -"o -4/ 6T r/a r/at /1. aoger Francom Senior Environmental Coord inator US Magnesium LLC Enclosure REVIEWED Initials JBR Date 1/7/2025 Comp Status Meets File # 10716 Blue 2 plant shutdown. SIX MONTH MONITORING REPORT April 1,2024 through September 30, 2024 Operating Permit # 4500030003 In accordance with Operating Permit provision I.S.2.a, and Utah Administrative Code (UAC) R307-4 1 5-6a(3)(c)(i), the following monitoring report is submitted. This report covers the period from 41112024 to 913012024. For the indicated reporting period: There were no deviations from any permit requirements. Deviations from permit operating requirements are listed on Attachment A. The list includes the information required by Operating Permit provision I.S.2.a, and UAC R307-a 1 s-6a(3)(c)(i). ln accordance with Operating Permit provision I.K and UAC R307-415-5d, and based on information and belief formed after reasonable inquiry, I certify that the statements and information in this document are true, accurate, and complete. ro/ t lz* Date x Ron Thayer, President US M,q,CUESTM LLC Sx Moxrn MorrroRrNc RnPonr April 1,2024 through September 30,,2024 Attachment A Chlorine Reduction Burner Absorber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration. hours During this period due to magnesium production being temporarily stopped, the Chlorine Reduction Burner was down. Chlorine Reduction Burner Deviations from Operating Temperature Range Starting and ending times are tbr the recorded I -hour block values. Date and time I Duration, hours During this period due to magnesium production being temporarily stopped, the Chlorine Reduction Burner was down. Emergency Off-Gas Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded I -hour block values. Date and time Duration. hours During this period due to magnesium production being temporarily stopped the Off-Gas Scrubber was down. East Packed Tower Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration. hours During this period due to magnesium production being temporarily stopped the East Packed Tower was down. West Packed Tower Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time Duration. hours During this period due to magnesium production being temporarily stopped the West Packed Tower was down. US MaCxESIUM LLC Srx MoNrH MoNrroRrNG Rnponr April 1,2024 through September 30,2024 High Energy Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration, hours During this period due to magnesium production being temporarily stopped, the High Scrubber was down. Spray Dryer 01 Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time Duration. hours During this period due to magnesium production being temporarily stopped Spray 01 was down. Spray Dryer 02 Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration. hours During this period due to magnesium production being temporarily stopped Spray 02 was down. Spray Dryer 03 Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded 1-hour block values. Date and time I Duration. hours During this period due to magnesium production being il Dryer 03 was down. 05106 Bin Scrubber Deviations from Recirculating Flow Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration. hours During this period due to magnesium production being temporarily stopped 05106 Bin Scrubber was not in use. Attachment A Page 2 of 3 US M,q,cxEsruM LLC Sx Moxrn MoxrroRrNc RrPonr April 1,2024 through September 30,2024 05/06 Bin Scrubber Deviations from Discharge Gas Temperature Operating Parameter Range Starting and ending times are for the recorded l-hour block values. Date and time I Duration, hours During this period due to magnesium production being temporarily stopped 05/06 Bin Scrubber was not in use. Acid Plant Sodium Hydroxide Scrubber Deviations from rolling}4-hour Average Recirculated Liquor pH Not Less Than 8.0 Operating Limit Duration is number of I hour blocks below the daily average limit for the calendar day. Acid Plant Sodium Hydroxide Scrubber Deviations from Daily Average Liquor Recirculation Rate Operating Limit Duration is number of I hour blocks below the daily average limit for the calendar day. Date Duration (hours) Percent Operating Hours Cause Durine this reporting period, the 36oh hydrochloric acid plant was not in production. US Magnesium (USM) submitted a letter to UDEQ-DAQ on September 1,2023, that the stack testing on the 63 MMBTU/hr boiler in the lithium operation would not be happening by September 30, 2023, due to the failure of the 2 regulators that control gas flow to the boiler. Because of the lead times in getting the new regulators and having to reschedule the stack tester, the stack test originally scheduled for September 27,2023, had to be moved to November 28,2023. Date Duration ftours) Percent Operating Hours Cause Durins this reportins period. the 36%o hydrochloric acid plant was not in production. UTAH DFPARTMENT OF ENVIRONMENTAL QUALIry DIVISION OF AIR OIJALITY Attachment A Page 3 of3