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PLANT, PIPELINE AND EQUIPMENT (Tables)
3 Months Ended
Mar. 31, 2014
PLANT, PIPELINE AND EQUIPMENT [Abstract]  
Plant, Pipeline and Equipment
Plant, pipeline and equipment at March 31, 2014, and December 31, 2013, consisted of the following:

   
March 31, 2014
  
December 31, 2013
 
   
(thousands of dollars)
 
Platinum catalyst
 $1,612  $1,612 
Land
  1,577   1,577 
Plant, pipeline and equipment
  72,533   71,115 
Construction in progress
  1,123   824 
Total plant, pipeline and equipment
  76,845   75,128 
  Less accumulated depreciation and amortization
  (34,616)  (33,203)
Plant, pipeline and equipment, net
 $42,229  $41,925