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Northern Border Pipeline Company
FERC Gas Tariff
First Revised Volume No. 1

Seventh Revised Sheet No. 209
Superseding
Sixth Revised Sheet No. 209

                         GENERAL TERMS AND CONDITIONS


  1.  DEFINITIONS (Continued)

        o   The term "Daily Contract Dekatherm-miles" shall mean the 
            amount of Shippers Contract Dekatherm-miles on a 
            100 Dekatherm-miles basis per day.

        o   The term "Daily Delivery Quantity" of a Shipper for any day 
            shall mean such Shipper's Btu Adjusted Maximum Delivery 
            Quantity for a Point of Delivery or such lesser quantity as 
            Company shall from time to time determine, with not less than 
            four hours' notice thereof to Shipper, on a basis which 
            reflects seasonal variations in the capacity of Company's 
            facilities and reductions in the capacity of such facilities 
            resulting from maintenance operations and does not 
            discriminate among Shippers. 

        o   The term "Dekatherm" (Dth) shall mean a unit of heating value.  
            The standard quantity for nominations, confirmation and 
            scheduling is dekatherms per gas day in the United States, 
            gigajoules per gas day in Canada and gigacalories per gas day 
            in Mexico.  (For reference 1 dekatherm = 1,000,000 Btu's; and 
            1 gigajoule = 1,000,000,000 joules; and 1 gigacalorie = 
            1,000,000,000 calories.)  For commercial purposes, the standard 
            conversion factor between dekatherms and gigajoules is 
            1.055056 gigajoules per dekatherm and between dekatherms and 
            gigacalories is 0.251996 gigacalories per dekatherm.  The 
            standard Btu is the International Btu, which is also called the 
            Btu(IT); the standard joule is the joule specified in the SI 
            system of units.  (The International Btu is specified for use 
            in the gas measurement standards of the American Gas 
            Association, the American Petroleum Institute, the Gas 
            Processors Association and the American Society for Testing 
            Materials.  For non-commercial purposes, these associations 
            note that the exact conversion factor is 1.05505585262 
            Gigajoules per Dekatherm.)  Daily Dekatherms shall be the 
            quantity units used by Company for nominations, confirmations, 
            scheduling, allocating, and imbalance activity. [1.3.14]

Issued by: Bambi L. Heckerman, Manager, Regulatory Affairs
Issued on: February 18, 2010                  Effective on: March 22, 2010
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