Natural Gas Pipeline Company Of America

Seventh Revised Volume No. 1

Effective Date: 04/18/2008, Docket: RP08-319-000, Status: Effective

Original Sheet No. 471 Original Sheet No. 471 : Pending

GENERAL TERMS AND CONDITIONS

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(b) If a continuous sampler is installed, then the

heating value of the gas so taken shall be applied prospectively to

the gas delivered beginning no later than the first of the following

month. If gas samples are taken, then the heating value of the

sample so taken shall be applied prospectively to the gas delivered

beginning no later than the first of the following month and used

until a new sample is taken. When a chromatograph is used to update

heating values into an electronic flow computer, either locally or

remotely, the average heating value shall be considered as the

average heating value recorded by the electronic flow computer. All

heating value determinations made with a chromatograph shall use

physical constants for gas compounds as outlined in the AGA Report

#3, Third Edition, October, 1990 titled "Orifice Metering of Natural

Gas" or (at Natural's discretion) any subsequent amendment or

revision to such report. If tested against a certified standard

sample, the heating value determining device shall be considered

correct if it shall check in such test within ten (10) Btu per cubic

foot.

24.4 DETERMINATION OF FLOWING TEMPERATURE

The temperature of the gas flowing through the meter or

meters shall be determined by the continuous use of a recording

thermometer installed so that it will properly record the

temperature of the gas flowing through the meter or meters. The

temperatures recorded during periods of flow each day shall be used

in computing the volumes of gas for that day.

24.5 DETERMINATION OF SPECIFIC GRAVITY

(a) At Natural's sole option, the specific gravity

value of the gas may be determined by the use of a chromatograph, by

the use of a continuous sampler, or by the taking of gas samples.

(b) If a continuous sampler is installed, the specific

gravity value of the gas so taken shall be applied prospectively to

the gas delivered beginning no later than the first of the following

month. If gas samples are taken, then the specific gravity value of

the sample so taken shall be applied prospectively to the gas

delivered beginning no later than the first of the following month

and used until a new sample is taken. When a chromatograph is used

to update specific gravity values into an electronic flow computer,

either locally or remotely, the average specific gravity value shall

be considered as the average specific gravity value recorded by the