Reliant Energy Gas Transmission Company

Fourth Revised Volume No. 1

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Effective Date: 05/01/1997, Docket: RP97- 57-002, Status: Effective

Fourth Revised Sheet No. 165 Fourth Revised Sheet No. 165 : Effective

Superseding: Third Revised Sheet No. 165

GENERAL TERMS AND CONDITIONS

(continued)

Gross Heating Value shall mean the number of British

Thermal Units produced by the combustion at constant

pressure of the amount of dry Gas which would occupy

a volume of one cubic foot at a temperature of sixty

degrees (60ø) Fahrenheit and under an absolute

pressure of 14.73 pounds per square inch with air of

the same temperature and pressure as the Gas, when

the products of combustion are cooled to the initial

temperature of Gas and air, and when the water

formed by combustion is condensed to the liquid

state.

Imbalance shall mean the difference in the MMBtu or

quantity of Gas which Shipper receives at the

Point(s) of Delivery and the MMBtu or quantity of

Gas which Transporter receives for the account of

Shipper at the Point(s) of Receipt (exclusive of the

quantity received as Storage Fuel, if any, and

Compressor Fuel) at any time or during any given

period under a Service Agreement.

Index Price shall mean the arithmetic average of the

daily prices quoted for deliveries to Transporter in

the Daily Price Surveys published by Gas Daily for

the last two weeks of the Month and for the Pooling

Area or geographic area which most closely

approximates the applicable Pooling Area (if spot

prices are quoted for Transporter's Pooling Areas or

other geographic designations) in which a particular

Imbalance is incurred. If such surveys are no

longer published, the Index Price shall be derived

in the same manner, using the weekly spot prices

quoted in Inside FERC's Gas Marketing Report.

Transporter will post on its EBB, and update from

time to time, for each Pooling Area, the Gas Daily

geographic designation which will be used for such

Pooling Area.

Injection Period. See Section 7 of Rate Schedule

FSS.

Interruptible Maximum Daily Injection Quantity. See

Section 6 of Rate Schedule ISS.