Columbia Gas Transmission LLC

Third Revised Volume No. 1

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Effective Date: 03/03/2009, Docket: RP09-340-000, Status: Effective

Original Sheet No. 364 Original Sheet No. 364

GENERAL TERMS AND CONDITIONS (Cont'd)

26.7 Heating Value. The heating value of the natural gas shall be determined by calorimetric,

chromatographic, or other generally accepted analytical method at Transporter's option:

(a) where Electronic Measurement equipment is provided,

(1) by contemporaneous application of continuous instantaneous heating value measurements,

or by contemporaneous application of the arithmetic or other average of the heating

value for the time during which gas was flowing,

(2) by prospective application of the arithmetic or other average of the heating value

Record, or

(3) by prospective application of the results of analyses of samples of the gas;

(b) where Electronic Measurement equipment is not provided,

(1) by the contemporaneous application of the arithmetic or other average of the hourly or

daily continuous heating value Record,

(2) by prospective application of the results of analyses of samples of the gas; or

(c) by any other method or methods mutually agreed upon by Transporter and Shipper.

26.8 Supercompressibility.

(a) The deviation of the natural gas from the Ideal Gas Laws shall be determined:

(1) in accordance with the American Gas Association, Par Research Project NX-19 report,

titled "Manual for the Determination of Supercompressibility Factors for Natural Gas",

Reprinted 1976, if the composition of the natural gas is such to render this procedure

applicable, or

(2) by any other method mutually agreed upon by Transporter and Shipper.