Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 10/29/2001, Docket: RP01-614-000, Status: Effective

Fifth Revised Sheet No. 230 Fifth Revised Sheet No. 230 : Effective

Superseding: Fourth Revised Sheet No. 230

GENERAL TERMS AND CONDITIONS

4. MEASUREMENT REPORTING (Continued)

4.2 Computation of Volume from Meter Readings and Registrations

(Continued)

4.23 If positive displacement or turbine meters are used,

measurements of the volumes received or delivered at

flowing pressures and temperatures shall be

corrected to the volumetric measurement base by the

application of proper correction factors for (a)

absolute static pressure, (b) flowing temperature

and (c) supercompressibility. If an integrating

device is used, correction for the deviation from

Boyle's Law may be built into the device; otherwise

such correction shall be applied to the volume of

gas indicated.

4.3 Energy Quantity

4.31 Standard Reference Conditions

The standardized reporting basis for BTU is

14.73 dry psia and 60 degrees F(101.325 kPa and

15 degrees C, and dry). The standardized reporting

basis for gigacalorie is 1.035646 Kg/cm2 and

15.6 degrees C and dry. [2.3.9/v1.3]

4.32 Calculation of Energy Quantity

The energy quantity, based on Standard Reference

Conditions, is the product of the physical volume

measured, in thousands of cubic feet (Mcf) and the

gross heating value of the measured gas (Btu/cf).

4.33 Reporting/Calculation Accuracy

For reporting purposes, BTU conversion factors shall

be reported to not less than 3 decimal places. For

calculating purposes, not less than 6 decimal places

shall be used. [2.3.10/v1.0]

4.34 Energy Unit of Measurement

The reporting unit for energy quantity used by

Company will be Dekatherms (Dth) at Standard

Reference Conditions.