Phillips Gas Pipeline Company

First Revised Volume No. 1

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Effective Date: 06/01/1993, Docket: RS92- 47-003, Status: Effective

Original Sheet No. 29 Original Sheet No. 29 : Effective

1.8 The term "Btu" shall mean British Thermal Unit, and is defined

as the amount of heat required to raise the temperature of one

pound of water one degree (1ø) Fahrenheit at a standard

pressure of fourteen and sixty-five hundredths pounds per

square inch absolute (14.65 p.s.i.a.) and a starting temperature

of 59.5ø F.

1.9 The term "gross heating value" shall mean the quantity of heat

in Btu's liberated by the complete combustion at constant

pressure, of a cubic foot of gas at a temperature of sixty

degrees (60ø) Fahrenheit saturated with water vapor and at an

absolute pressure of fourteen and sixty-five hundredths pounds

per square inch absolute (14.65 p.s.i.a.) with air at the same

temperature and pressure as the gas, when the products of the

combustion are cooled to the initial temperature of the gas and

air and when the water formed by combustion is condensed to

the liquid state.

1.10 The term "MMBtu" shall mean one million Btu.

1.11 The term "psig" shall mean pounds per square inch gauge.

1.12 The term "transportation" shall mean the compression or

transmission of gas or some combination thereof whether by

exchange, backhaul or any other actual or constructive method

of movement.

1.13 The term "firm transportation quantity" shall be the quantity of

natural gas which PGPL shall be obligated to receive from

shipper and transport on any day under a Firm Service

Agreement, and shall be as stated in the Firm Service

Agreement.

1.14 The term "interruptible transportation quantity" shall be the

maximum quantity of natural gas which PGPL may be obligated

to receive from Shipper on an interruptible basis on any day

under an Interruptible Service Agreement, subject to reduction

under the provisions of Section 14 thereof.