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 | |
|---|---|---|---|---|---|---|
| B004088 | CERIUM 90 LEACH CIRCUIT | Feed Slurry Tank, with agitator @ 0.3 hp 3 Leac... | 04/09/2001 | 02/28/2002 |
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| B004090 | No. 2 SODA ASH FEED PROCESS | Soda Ash Storage Bin, 10,000 gal Total hp = 10.... | 02/15/2011 | 02/29/2012 |
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| B004093 | WASTEWATER TREATMENT SYSTEM | N/A | 04/09/2001 | 02/28/2002 |
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| B004100 | LEACH RESIDUE (CERIUM-96 PLANT) CIRCUIT | N/A | 02/10/2026 | 02/28/2027 |
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| C004930 | SCRUBBER, RESIDUE FILTER (WATER) | a Paramount Fabricators caustic scrubber, 36" di... | 02/10/2026 | 02/28/2027 |
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| B004325 | AQUA AMMONIA (15%) SYSTEM | a Storage Tank for 15% Aqua Ammonia, 30 ft diame... | 04/09/2001 | 02/28/2002 |
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| C004326 | SCRUBBER - AQUA AMMONIA | a unit with 6 in diameter by 30 ft high and 1 ft... | 04/09/2001 | 02/28/2002 |
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| B004333 | YTTRIUM PRECIPITATION - SPECIALTY PLANT | N/A | 02/15/2011 | 02/29/2012 |
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| B004489 | STABILIZED LEAD/IRON REINTRODUCTION PROCESS | N/A | 02/15/2011 | 02/29/2012 |
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| C004490 | BAGHOUSE - STABILIZED Pb/Fe REINTRODUCTION PROCE... | a cartridge type unit by Fabric Filters Northwes... | 02/15/2011 | 02/29/2012 |
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| B004664 | RIBBON BLENDER DRYER | a skid mounted unit, 4 ft diameter by 15 ft long... | 02/10/2026 | 02/28/2027 |
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| B004923 | SPECIALTY PLANT No. 1 NEODYMIUM DRYER | N/A | 02/10/2026 | 02/28/2027 |
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| B004924 | SPECIALTY PLANT No. 2 NEODYMIUM DRYER | N/A | 02/10/2026 | 02/28/2027 |
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| B004933 | LEACH CIRCUIT - FLOATATION PLANT | N/A | 02/15/2011 | 02/29/2012 |
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| C005098 | SCRUBBER No. 1- LEACH CIRCUIT (FLOATATION PLANT)... | a unit manufactured by DEI Systems, Inc., model ... | 02/15/2011 | 02/29/2012 |
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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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| T004095 | CONCENTRATE STORAGE BIN | a bin known as No. 1 EAST, 204, which is located... | 03/12/2013 | 02/28/2014 |
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| T004096 | CONCENTRATE STORAGE BIN | a unit known as No. 2 WEST, 204 and has the dime... | 03/12/2013 | 02/28/2014 |
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| T004548 | PORTABLE SILO | a 1200 cu ft vertical, dry material unit by Belg... | 08/08/2017 | 02/28/2018 |
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| C000376 | BAGHOUSE (No. 1 CONCENTRATE DRYER FEED) | a Mikro-Pul Model 49-S-10 baghouse, equipped wit... | 03/12/2013 | 02/28/2014 |
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