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INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2013
INVENTORIES [Abstract]  
Inventories
 Inventories include the following:

   
September 30, 2013
  
December 31, 2012
 
   
(thousands of dollars)
 
Raw material
 $3,937  $3,591 
Petrochemical products
  9,173   6,249 
Total inventory
 $13,110  $9,840