Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT

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PROPERTY, PLANT AND EQUIPMENT
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consisted of the following:
March 31, 2022 December 31, 2021
  (thousands of dollars)
Platinum catalyst metal $ 1,478  $ 1,478 
Catalyst 4,325  4,325 
Land 5,400  5,428 
Plant, pipeline and equipment 286,491  282,780 
Construction in progress 7,901  7,213 
Total property, plant and equipment $ 305,595  $ 301,224 
Less accumulated depreciation (119,566) (115,703)
Total property, plant and equipment, net $ 186,029  $ 185,521 
Property, plant and equipment serve as collateral for our amended and restated credit agreement. See Note 10.
In the first quarter of 2022, the Company donated approximately $0.5 million of land and other property, plant and equipment to a local municipal organization, which is included in other non-cash items on the condensed consolidated statement of cash flows.
Labor capitalized for construction was approximately $0.1 million and $0.6 million for the three months ended March 31, 2022 and 2021, respectively.
Construction in progress during the first three months of 2022 included pipeline upgrades and costs related to a scheduled plant turnaround late in the first quarter at our Specialty Petrochemicals facility. Construction in progress during the first three months of 2021 included costs for rebuild and restoration of a distillation tower.