Facility Info
364
Mountain Pass Mine
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 |
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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 |
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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 |
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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 |
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| E007792 | DIESEL IC ENGINE, EMERGENCY GENERATOR | Year of Manufacture: Unknown | 02/10/2026 | 02/28/2027 |
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| E010118 | DIESEL IC ENGINE, EMERGENCY GENERATOR (GND-2) | Yr of Mfg1987, Tier 0 | 03/12/2013 | 02/28/2014 |
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| E011115 | DIESEL IC ENGINE, EMERGENCY GENERATOR | Emergency engine #1 at CHP. Year of manufacture ... | 02/10/2026 | 02/28/2027 |
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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 |
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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 |
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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 |
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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 |
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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 |
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| N004629 | GASOLINE DISPENSING FACILITY (NON-RETAIL) | N/A | 02/10/2026 | 02/28/2027 |
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| T001942 | BASTNASITE LEACH TANK SYSTEM | N/A | 04/01/1999 | 02/29/2000 |
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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 |
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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 |
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| T000835 | STORAGE TANK, HCL FOR MILL (46-3308) | a 20,000 gallon capacity tank. | 08/08/2017 | 02/28/2018 |
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| T004939 | HOPPER | a 125 cu ft hopper used to repackage Bastnasite ... | 02/15/2011 | 02/29/2012 |
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| T003117 | TANK - WASTE OIL | Supervault 2000 gal, double wall | 02/10/2026 | 02/28/2027 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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