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PLANT, PIPELINE AND EQUIPMENT
3 Months Ended
Mar. 31, 2012
PLANT, PIPELINE AND EQUIPMENT [Abstract]  
PLANT, PIPELINE AND EQUIPMENT
5. PLANT, PIPELINE AND EQUIPMENT
 
Plant, pipeline and equipment at March 31, 2012, and December 31, 2011, consisted of the following:

   
March 31, 2012
  
December 31, 2011
 
   
(thousands of dollars)
 
Platinum catalyst
 $1,497  $1,497 
Land
  1,575   1,422 
Plant, pipeline and equipment
  58,712   57,215 
Construction in progress
  592   490 
Total plant, pipeline and equipment
  62,376   60,624 
  Less accumulated depreciation and amortization
  (24,747)  (23,672)
Net plant, pipeline and equipment
 $37,629  $36,952 

Plant, pipeline, and equipment serve as collateral for a $14.0 million term loan with a domestic bank (see Note 7).

Construction in progress during the first three months of 2012 included installation of tankage, reworking an existing tower, and preliminary pipeline upgrades.

Amortization relating to the platinum catalyst which is included in cost of sales was $3,184 and $3,281 for the three months ended March 31, 2012, and 2011, respectively.