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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2014
INVENTORIES [Abstract]  
Inventories
Inventories include the following:

   
March 31, 2014
  
December 31, 2013
 
   
(thousands of dollars)
 
Raw material
 $2,500  $2,403 
Petrochemical products
  9,477   9,660 
Total inventory
 $11,977  $12,063