Transwestern Pipeline Company

Second Revised Volume No. 1

Effective Date: 06/06/1994, Docket: RP94-234-000, Status: Effective

3rd Revised Sheet No. 51 3rd Revised Sheet No. 51 : Effective

Superseding: 2nd Revised Sheet No. 51

GENERAL TERMS AND CONDITIONS

(continued)

1.7 The term "dekatherm" (dth) shall mean the quantity of heat energy

which is equivalent to 1,000,000 British Thermal Units. One

"dekatherm of gas" shall mean the quantity of gas which contains one

dekatherm of heat energy.

1.8 The term "Mcf" shall mean 1,000 cubic feet of gas.

1.9 The term "total heating value" means:

A. For Shippers receiving service by Transporter to the Needles

and/or Topock delivery points, the number of British

Thermal Units evolved by the complete combustion with air, at

constant pressure, of one cubic foot of anhydrous (dry) gas

under a pressure of 14.73 psia and at a temperature

of 60o Fahrenheit and when the products of combustion are cooled

to the initial temperature of the gas and air and all of the

water formed by combustion is condensed to the liquid state in

accordance with rules set forth in "Public Utilities Commission

of the State of California General Order No. 58-B" or any other

methods of determination as may be mutually agreed upon.

B. For Shippers receiving service for gas delivered at any delivery

point except the Needles and Topock delivery points, the

number of British Thermal Units evolved by the complete

combustion with air, at constant pressure, of one cubic foot of

anhydrous (dry) gas under a pressure of 14.73 psia and at a

temperature of 60o Fahrenheit and when the products of

combustion are cooled to the initial temperature of the gas and

air and all of the water formed by combustion is condensed to

the liquid state, or any other methods of determination as may

be mutually agreed upon.

1.10 The term "quantity of gas" shall mean the number of units of gas

expressed in dekatherms unless otherwise specified.

1.11 The term "Operator" shall mean a party which physically operates

facilities connected to Transporter's pipeline system for

deliveries of gas into or out of Transporter's system or a

third-party designated in writing by the Operator physically

operating such facility to sign an Operator Balancing Agreement

for the interconnect point(s).

Such third-party Operator must meet on a continuing basis the

creditworthiness requirement of Transwestern's FERC Gas Tariff,

must execute an Operator Balancing Agreement in place of such

Operator(s), and must agree to assume all of the Operator's

rights, duties and obligations under the Operator Balancing

Agreement for the designated interconnect point(s).