Questar Overthrust Pipeline Company

Second Revised Volume No. 1-A

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Effective Date: 01/01/2008, Docket: RP08-142-000, Status: Effective

1st Rev. Second Revised Sheet No. 33 1st Rev. Second Revised Sheet No. 33 : Effective

Superseding: 1st Rev. First Revised Sheet No. 33



permits, or labor to perform or comply with any obligation

or condition of this tariff; inability to obtain rights-of-way; and any other

causes, whether of the kind herein recited or not, which are not reasonably

in the control of the party claiming suspension.


1.18 Gas means combustible hydrocarbon gas.


1.19 Gross heating value means the number of British thermal units

produced by the combustion at a constant pressure, of the amount of gas which

would occupy a volume of one cubic foot at a temperature of 60 degrees

Fahrenheit on a water-free basis and under a pressure equivalent to that of

30.0 inches of mercury at 32 degrees Fahrenheit and under standard

gravitational force (acceleration of 980.665 cm/sec2) 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 vapor

formed by combustion is condensed to the liquid state.


1.20 Hydrocarbon Dew Point means the temperature at which hydrocarbon

liquids first begin to form in a gas stream at a given pipeline pressure.


1.21 Inert substances means non-combustible substances contained in the

gas, including but not limited to helium, carbon dioxide and nitrogen.


1.22 Interruption means reducing, suspending or discontinuing either

the receipt or delivery of gas.


1.23 Intra-day nomination is a nomination submitted after the

nomination deadline whose effective time is no earlier than the beginning of

the gas day and runs through the end of that gas day.


1.24 Mcf means l,000 cubic feet of gas. "MMcf" means 1,000,000 cubic

feet of gas.


1.25 Month means the period beginning at 8:00 a.m. on the first day of

any calendar month and ending at the same hour on the first day of the

succeeding calendar month.


1.26 Operational flow order (OFO) means an order issued to alleviate

conditions, inter alia, which threaten or could threaten the safe operations

or system integrity of Overthrust's system, or to maintain operations

required to provide efficient and reliable firm service. Whenever Overthrust

experiences these conditions, any pertinent order shall be referred to as an

operational flow order.