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INVENTORIES AND SUPPLIES
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
INVENTORIES AND SUPPLIES
INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
 
December 31, 2017
 
December 31, 2016
Oil and oil related products
$
58,142

 
$
52,158

Supplies and drums
94,242

 
90,610

Solvent and solutions
9,167

 
8,566

Modular camp accommodations
1,826

 
15,255

Other
12,635

 
11,839

Total inventories and supplies
$
176,012

 
$
178,428


As of December 31, 2017 and 2016, other inventories consisted primarily of cleaning fluids, such as absorbents and wipers, and automotive fluids, such as windshield washer fluid and antifreeze. Supplies and drums consist primarily of drums and containers as well as critical spare parts to support the Company's incinerator and re-refinery operations. During the second quarter of 2017, $12.6 million of modular camp accommodations inventory was transferred to and included as camp equipment within the Company's property, plant and equipment amount as such assets will be utilized in the Company's ongoing camp and lodging operations.