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INVENTORIES AND SUPPLIES | 3 Months Ended
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Mar. 31, 2022
Inventory Disclosure [Abstract] |
INVENTORIES AND SUPPLIES | INVENTORIES AND SUPPLIES Inventories and supplies consisted of the following (in thousands):
| March 31, 2022 |  | December 31, 2021
Oil and oil related products | $ | 105,011 |  |  | $ | 101,965 |
Supplies | 136,031 |  |  | 126,602 |
Solvent and solutions | 9,141 |  |  | 8,099 |
Other | 14,550 |  |  | 14,026 |
Total inventories and supplies | $ | 264,733 |  |  | $ | 250,692 |
Supplies inventories consist primarily of critical spare parts to support the Company's incinerator and re-refinery operations, personal protective equipment and other general supplies used in our normal day-to-day operations. Other inventories consist primarily of parts washer components, cleaning fluids, absorbents and automotive fluids, such as windshield washer fluid and antifreeze.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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