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INVENTORIES AND SUPPLIES
 6 Months Ended
Jun. 30, 2024
Inventory Disclosure [Abstract]  
INVENTORIES AND SUPPLIES INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
June 30, 2024December 31, 2023
Supplies$193,226 $177,217 
Oil and oil related products139,870 118,600 
Solvent and solutions13,679 11,795 
Other18,581 19,899 
Total inventories and supplies$365,356 $327,511 
Supplies inventories consist primarily of critical spare parts to support the Company’s incinerator and re-refinery operations 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.