Westgas Interstate, Inc.

First Revised Volume No. 1

Effective Date: 08/01/1999, Docket: RP99-422-000, Status: Effective

Second Revised Sheet No. 29A Second Revised Sheet No. 29A : Effective

Superseding: First Revised Sheet No. 29A

GENERAL TERMS AND CONDITIONS

(Continued)

standard conversion factor between dekatherms and

gigajoules is 1.055056 gigajoules per dekatherm and

between dekatherms and gigacalories is .251996

gigacalories per dekatherm. The standard Btu is the

International Btu, which is called the Btu(IT); the

standard joule is the joule specified in the SI system of

units.*

1.8 "Equivalent volumes" means the sum of the volumes of

gas measured in dekatherms received by Transporter for the

account of Shipper at the points of receipt during any

given period of time, (a) reduced by (i) Shipper's pro

rata share of fuel gas and the unaccounted-for gas

resulting from the operations of Transporter during the

same period of time and (ii) any gas vented during the

same period of time, (b) adjusted for any variations in

Btu content, as corrected for any water vapor in excess

offive pounds per million cubic feet of gas. The volumes

of gas delivered at the point of delivery after

transportation shall be the thermal equivalent of the

volumes of gas received at the point of receipt for

transportation, after reduction, correction and adjustment

as provided above.

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*- The International Btu is specified for use in 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.