Northern Border Pipeline Company

First Revised Volume No. 1

Effective Date: 03/12/2001, Docket: RP01-228-000, Status: Effective

Fourth Revised Sheet Number 229 Fourth Revised Sheet Number 229 : Effective

Superseding: Third Revised Sheet Number 229

GENERAL TERMS AND CONDITIONS

3. MEASURING EQUIPMENT (Continued)

3.7 Failure of Measuring Equipment (Continued)

3.73 If neither of the methods provided in

Subsections 3.71 and 3.72 above can be used, by

estimating the necessary determinants by reference

to receipts or deliveries under similar conditions.

3.8 Preservation of Records

Both Company and the Shipper or Shippers affected shall

preserve for a period of at least three years, or such

longer period as may be required by public authority, all

test data and measurement records.

4. MEASUREMENT REPORTING

4.1 Physical Volume

4.11 Standard Reference Conditions

The standardized reporting basis for gas volumes is

cubic foot at standard conditions of 14.73 psia,

60 degrees F, and dry. For gas volumes reported in

cubic meters, the standard conditions are

101.325 kPa, 15 degrees C, and dry. [2.3.9/v1.3]

4.12 Reporting/Calculation Accuracy

For reporting purposes, pressure base conversion

factors shall be reported to not less than 6 decimal

places. For calculation purposes, not less than

6 decimal places shall be used.

4.13 Volumetric Unit of Measurement

The standard reporting unit for natural gas volume

used by Company will be thousands of cubic feet

(Mcf) of gas at Standard Reference Conditions.