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INVENTORIES AND SUPPLIES
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
INVENTORIES AND SUPPLIES INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
 
December 31, 2019
 
December 31, 2018
Oil and oil related products
$
75,408

 
$
70,823

Supplies and drums
115,128

 
104,609

Solvent and solutions
9,973

 
10,657

Other
14,235

 
13,390

Total inventories and supplies
$
214,744

 
$
199,479


Supplies and drums consist primarily of drums and containers used in providing the Company's products and services as well as critical spare parts to support the Company's incinerator and re-refinery operations. Other inventories consisted primarily of parts washer components, cleaning fluids, absorbents and automotive fluids, such as windshield washer fluid and antifreeze.