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INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2012
INVENTORIES [Abstract]  
Inventory
Inventories include the following:

   
September 30, 2012
  
December 31, 2011
 
   
(thousands of dollars)
 
Raw material
 $4,144  $3,400 
Petrochemical products
  6,181   6,056 
Total inventory
 $10,325  $9,456