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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2014
INVENTORIES [Abstract]  
Inventories
Inventories include the following:

   
June 30, 2014
  
December 31, 2013
 
   
(thousands of dollars)
 
Raw material
 $3,059  $2,403 
Petrochemical products
  8,643   9,660 
Total inventory
 $11,702  $12,063