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)
- N/A
- 35.47599
- -115.52827
- No
- 320
- 0
- 24
- 5
- 48
- N/A
- 212390
- 1099
- 634E/3926N
- No
- 02
Zone 2 - Outer regions of I-15 Corridor, round trip 4 hours, intrazone 1 hour
- Yes
- 36
- 36
- O
- Active
- No
- No
- NOx, PM10
- No
- N/A
- No
- 12/31/1969
- 08/23/2024
| Permit Number | Permit Description | Equipment Description | Issue Date | Expiration Date | Action | |
|---|---|---|---|---|---|---|
| B001941 | LEACH/CCD CIRCUIT - LANTHANIDES PROCESS | N/A | 02/05/2025 | 02/28/2026 |
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| C001940 | SCRUBBER, BACK FUME WET SCRUBBER | a TFI International chlorine fume scrubber servi... | 02/05/2025 | 02/28/2026 |
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| B001947 | LANTHANUM PRECIPITATION PROCESS | N/A | 02/05/2025 | 02/28/2026 |
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| B002167 | PRODUCT DRYER - CERIUM CARBONATE | N/A | 02/15/2011 | 02/29/2012 |
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| C002078 | BAGHOUSE - CERIUM DRYER | a Mikropul model 20S-10-30 with the following sp... | 02/15/2011 | 02/29/2012 |
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| B002168 | PACKAGING - CERIUM CARBONATE | a 4 hp Product Packaging Machine; dry product s... | 02/15/2011 | 02/29/2012 |
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| C002174 | BIN VENT - CERIUM CARBONATE PACKAGER | a Bin Vent exhausting by a 5 hp ID fan (4ID-740)... | 02/15/2011 | 02/29/2012 |
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| B002169 | LEACH CIRCUIT - CERIUM CARBONATE | N/A | 02/05/2025 | 02/28/2026 |
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| C002077 | SCRUBBER, CE 96 DISSOLUTION | a Mesa Fiberglass water scrubber, 36" diameter b... | 02/05/2025 | 02/28/2026 |
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| C003998 | BIN VENT - BORAX STORAGE BIN | a baghouse unit with 20 bags, whose total filter... | 02/05/2025 | 02/28/2026 |
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| C003999 | BIN VENT - NO. 4 CONCENTRATE | a baghouse unit with 20 bags, whose total filter... | 03/01/2004 | 02/28/2005 |
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| B002170 | CERIUM 96 PLANT - LEAD/IRON REMOVAL CIRCUIT | N/A | 02/05/2025 | 02/28/2026 |
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| C004000 | SCRUBBER, AMMONIA | Duall, model F303 ammonia scrubber, 48" diameter... | 03/12/2013 | 02/28/2014 |
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| B002171 | NEUTRALIZATION SCRUBBER SOLUTION CIRCUIT | N/A | 02/05/2025 | 02/28/2026 |
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| B002173 | CERIUM CARBONATE CIRCUIT | N/A | 02/05/2025 | 02/28/2026 |
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| C004295 | BAGHOUSE - SODA ASH STORAGE BIN (PRODUCT PRECIPI... | a Pulsaire, model 16S 10 30B, which serves the S... | 02/05/2025 | 02/28/2026 |
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| B002371 | SOLVENT EXTRACTION,- CIRCUIT No. 4 | N/A | 02/13/2012 | 02/28/2013 |
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| B002372 | SPECIALTY PLANT FEED PREPARATION CIRCUIT | N/A | 02/05/2025 | 02/28/2026 |
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| C004255 | CAUSTIC SCRUBBER | a Duall, model FW303, which is fed from Ce-96 Sc... | 02/05/2025 | 02/28/2026 |
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| B002373 | SOLVENT EXTRACTION CIRCUIT - SX 3/6 | N/A | 02/05/2025 | 02/28/2026 |
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| B002374 | SOLVENT EXTRACTION - CERIUM SPECIALTY PLANT (SX-... | N/A | 02/13/2012 | 02/28/2013 |
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| B002827 | SODA ASH TREATMENT SYSTEM | N/A | 02/15/2011 | 02/29/2012 |
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| B002828 | ROUGHER FLOATATION SYSTEM | N/A | 02/15/2011 | 02/29/2012 |
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| B002831 | PACKAGING SYSTEM FOR CERIUM CIRCUIT NO. 2 | N/A | 08/08/2017 | 02/28/2018 |
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| B002832 | PACKAGING MACHINE FOR No. 1 LANTHANUM DRYER SYST... | N/A | 02/15/2011 | 02/29/2012 |
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