National Fuel Gas Supply Corporation

Fourth Revised Volume No. 1

Effective Date: 04/01/2007, Docket: RP06-393-004, Status: Effective

First Revised Sheet No. 329 First Revised Sheet No. 329 : Effective

Superseding: Original Sheet No. 329

GENERAL TERMS AND CONDITIONS

1. DEFINITION OF TERMS (Cont'd.)

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

1.10 The term "British thermal unit" or "Btu" shall mean the amount of

heat required to raise the temperature of one pound of water 1

degree Fahrenheit at 60 degrees Fahrenheit.

1.11 The term "Dekatherm" or "Dth" shall mean the quantity of heat

energy which is equal to 1,000,000 Btu's.

1.12 The term "heating value", when applied to a cubic foot of gas,

means the number of British thermal units produced by the complete

combustion with air, at a constant pressure, of one anhydrous (dry)

cubic foot of gas at an absolute pressure of 14.73 pounds per

square inch and at a temperature of 60 degrees Fahrenheit, when the

products of combustion are cooled to the initial temperature of the

gas and air, and when water formed by combustion is condensed to a

liquid state.

1.13 The term "quantity of gas" shall mean a number of units of gas

expressed in dekatherms, unless otherwise specified.

1.14 The term "volume" shall mean the number of units of gas expressed

in cubic feet, unless otherwise specified.

1.15 The term "transportation" shall include transportation by forward

haul, back haul, displacement or exchange, and shall also include

storage, unless otherwise specified.

1.16 Reserved for future use.

1.17 The term "Hub Point" shall mean any receipt or delivery point

listed in this Section 1.17. Hub Points are "corresponding" Hub

Points if they are at the same location and involve Transporter and

no more than one other connecting pipeline company.