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 | |
|---|---|---|---|---|---|---|
| M014678 | DIESEL IC ENGINE, EMERGENCY GENERATOR | Year of Manufacture TBD, EPA Tier II Engine Fami... | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011317 | SXI (IMPURITIES REMOVAL) CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011325 | ADSORBER #1 - HCl, SXH/I CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011326 | ADSORBER #2 - HCl, SXH/I CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011327 | ADSORBER #1 - SX-12, SXH/I CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011328 | ADSORBER #2 - SX-12, SXH/I CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011909 | CHLOR ALKALI PROCESS, HCL REACTION UNIT #1 | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011910 | CHLOR ALKALI PROCESS, HCL REACTION UNIT #2 | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| T015259 | SODIUM CHLORIDE HOPPER | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011367 | BOILER, TEMPORARY MILL | 83 MMBtu/hr diesel fired boiler with dry low NOx... | 03/12/2013 | 02/28/2014 |
Download Permit Print Permit |
|
| C011368 | SELECTIVE CATALYTIC REDUCTION SYSTEM - MILL INTE... | Selective catalytic reduction system, manufactur... | 03/12/2013 | 02/28/2014 |
Download Permit Print Permit |
|
| B011431 | LNG WARMER (2) NATURAL GAS-FIRED PROCESS HEATERS... | Two - 8.8 MMBtu/hr natural gas fired burners. M... | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011391 | TEMPORARY PORTABLE LNG WARMER NATURAL GAS-FIRED ... | Two - 11 MMBtu/hr natural gas fired burners. Ma... | 03/12/2013 | 02/28/2014 |
Download Permit Print Permit |
|
| 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 Print Permit |
|
| B011581 | WATER TREATMENT PLANT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| T011582 | WATER TREATMENT PLANT ACID DAY TANK | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B011575 | DISSOLUTION EQUIPMENT | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011576 | CAUSTIC SCRUBBER, DISSOLUTION PROCESS | HEE-Duall Model PT503-32S packed bed scrubber. ... | 05/11/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011560 | WET CYCLONE - TEMPORARY SODA ASH SYSTEM | N/A | 03/12/2013 | 02/28/2014 |
Download Permit Print Permit |
|
| B011592 | WET LANTHANUM - PROCESS TRAIN 1 | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B015487 | CRUSHING SYSTEM, PRIMARY | All equipment capacities are in horsepower (hp).... | 05/11/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| B015488 | ORE SORTING SYSTEM | All equipment capacities are in horsepower (hp).... | 05/11/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| C011515 | CAUSTIC SCRUBBER, CERIUM REMOVAL CIRCUIT | Equipment ID F10-SSE901 / F10-SSE902 , Manufactu... | 04/03/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| T011605 | BREAK TANKS - HCL & CAUSTIC | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |
|
| T011606 | TANK FARM | N/A | 02/10/2026 | 02/28/2027 |
Download Permit Print Permit |