Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

Effective Date: 09/03/2004, Docket: RP04-440-000, Status: Effective

First Revised Sheet No. 111 First Revised Sheet No. 111 : Effective

Superseding: Original Sheet No. 111

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

3. QUALITY OF GAS (Continued)

3.2 Quality Tests:

(a) The quality specifications of the gas received by GTN

hereunder shall be determined by tests which GTN

shall cause to be made at the International Boundary or such

other locations on GTN's system if required

accordance with this Paragraph 3.2.

(b) The gross heating value of gas delivered hereunder shall

be determined from read-outs of continuously operating

measuring instruments. The method shall consist of one

or more of the following:

(1) calorimeter

(2) gas chromatograph

(3) any other method mutually agreed upon by the

parties.

Measurement of gross heating value with the calorimeters

shall comply with the standards set forth in the American

Society for Testing and Materials' ASTM D 1826. Analysis

of gas with gas chromatograph shall comply with the

standards set forth in ASTM D 1945. Calculation of the

gross heating value from compositional analysis by gas

chromatography shall comply with the standards set forth

in ASTM D 3588.

GTN or its agent shall calibrate and maintain the

gross heating value measurement device at intervals as

agreed upon by GTN and Shipper. Shipper shall have

access to GTN's devices and shall be allowed to

inspect the services and all charts or other records of

measurement at any reasonable time.

(Continued)