Facility Info

364
Mountain Pass Mine

67750 Bailey Road
Mountain Pass, CA 92366
Phone: 760-856-7664
Fax: N/A
10/17/07 Rec'd a change of owner applications for all the permits currently under Union Oil Molycorp. The change is going from Union Oil Molycorp to Chevron Mining, Inc. The company/facility numbers will be staying the same. (005/0364) Barbara Weese 08-08-2017 Moved Companies From Molycorp Minerals, LLC(5) to MP Mine Operations LLC(2349)

Permit Number Permit Description Equipment Description Issue Date Expiration Date Action
C014421 DUST COLLECTOR, LEACH PRESSURE LEAF FILTER Manufacturer: Flexicon, Model: BD-S30T-X, Seria... 02/10/2026 02/28/2027 Download Permit
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C014423 DUST COLLECTOR, SX FEED PREP PRESSURE LEAF FILTE... Manufacturer: Flexicon, Model: BD-S30T-X, Seria... 02/10/2026 02/28/2027 Download Permit
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C014580 DUST COLLECTOR, DIATOMACEOUS EARTH LEAF FILTER P... Manufacturer: Flexicon, Model: BD-S30T-X, Seria... 02/10/2026 02/28/2027 Download Permit
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DCP000017 DUST CONTROL PLAN (RULE 403(C)(8) MINING, STONE,... a 2222 acre rare earth mine at Mountain Pass. F... 02/10/2026 02/28/2027 Download Permit
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E007792 DIESEL IC ENGINE, EMERGENCY GENERATOR Year of Manufacture: Unknown 02/10/2026 02/28/2027 Download Permit
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E010118 DIESEL IC ENGINE, EMERGENCY GENERATOR (GND-2) Yr of Mfg1987, Tier 0 03/12/2013 02/28/2014 Download Permit
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E011115 DIESEL IC ENGINE, EMERGENCY GENERATOR Emergency engine #1 at CHP. Year of manufacture ... 02/10/2026 02/28/2027 Download Permit
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E011176 DIESEL IC ENGINE, EMERGENCY GENERATOR #2 Model Year 2010, Engine Family ACPXL106.T2E, Tie... 02/25/2020 02/28/2021 Download Permit
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E011175 DIESEL IC ENGINE, EMERGENCY GENERATOR #3 Model Year 2010, Engine Family ACPXL106.T2E, Tie... 08/08/2017 02/28/2018 Download Permit
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E011485 DIESEL IC ENGINE, EMERGENCY FIRE PUMP #1 A certified Tier 3 Diesel engine, EPA Family CJD... 02/10/2026 02/28/2027 Download Permit
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E011484 DIESEL IC ENGINE, EMERGENCY FIRE PUMP #2 A certified Tier 3 Diesel engine, EPA Family CJD... 02/10/2026 02/28/2027 Download Permit
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M014678 DIESEL IC ENGINE, EMERGENCY GENERATOR Year of Manufacture TBD, EPA Tier II Engine Fami... 02/10/2026 02/28/2027 Download Permit
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N004629 GASOLINE DISPENSING FACILITY (NON-RETAIL) N/A 02/10/2026 02/28/2027 Download Permit
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T001942 BASTNASITE LEACH TANK SYSTEM N/A 04/01/1999 02/29/2000 Download Permit
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T001943 SOLVENT STORAGE - SPECIALTY PLANT a steel tank, TS-75, which is used for kerosene.... 02/10/2026 02/28/2027 Download Permit
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T001948 KEROSENE STORAGE - SEPARATIONS PLANT STORAGE a mild steel tank, whose capacity is 13,700 gall... 02/10/2026 02/28/2027 Download Permit
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T000835 STORAGE TANK, HCL FOR MILL (46-3308) a 20,000 gallon capacity tank. 08/08/2017 02/28/2018 Download Permit
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T004939 HOPPER a 125 cu ft hopper used to repackage Bastnasite ... 02/15/2011 02/29/2012 Download Permit
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T003117 TANK - WASTE OIL Supervault 2000 gal, double wall 02/10/2026 02/28/2027 Download Permit
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T000374 CEMENT SILO a unit 10 ft in diameter by 20 ft high. This un... 02/15/2011 02/29/2012 Download Permit
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T000824 No. 2 CRUSHED ORE STORAGE BIN a Belt Conveyor, with 50 hp drive motor; Ore St... 02/15/2011 02/29/2012 Download Permit
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T000834 STORAGE TANKS - HYDROCHLORIC ACID TSR-76, which is No. 1 HCl storage tank; and TS... 02/10/2026 02/28/2027 Download Permit
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T002826 STORAGE TANK - SODA ASH Storage Tank, 152,100 lb of Soda Ash, which is e... 02/15/2011 02/29/2012 Download Permit
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T002830 STORAGE TANK- FEED TO ROD MILL No 1 FP-1 Ore Bin, which is 26 ft in diameter and 32... 02/15/2011 02/29/2012 Download Permit
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T004092 TANK FARM - FEED STORAGE 4 Storage Tanks, each at 20,000 gal; and 2 Fee... 02/10/2026 02/28/2027 Download Permit
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