El Paso Natural Gas Company

First Revised Volume No. 1-A

Effective Date: 05/01/1990, Docket: GT90- 26-000, Status: Effective

Original Sheet No. 204 Original Sheet No. 204 : Superseded

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

2. METHOD OF MEASUREMENT (Continued)

2.4 Determination of Flowing Temperature - The temperature of the

gas flowing through a meter station shall be obtained by the

use of a recording thermometer. The arithmetic average

temperature of the gas during the chart period shall be used

in computing the delivery of gas during such period. Where

the quantities of gas metered will not be materially affected

by so doing, the temperature at delivery shall be assumed to

be sixty degrees Fahrenheit (60~F) when not regularly measured.

2.5 Determination of Specific Gravity - The specific gravity of

the gas flowing through orifice meter stations, when used,

shall be determined by taking samples of such gas by means of

a recording gravitometer located at the measuring station or

at any other point on the pipeline where there will be no

commingling thereafter of gas, or by any other recognized

method which may be practical in the circumstances. The

arithmetic average specific gravity of the gas at such points

during the chart period shall be used in computing the

delivery of gas during such period at such points.

2.6 Chromatographic Analysis - If the heating value and/or the

specific gravity is determined by chromatographic analysis of

the gas sample, the values of the physical constants for the

gas compounds and the procedure for determining the gross

heating value and/or the specific gravity of the gas from them

shall be as set forth in the American Gas Association reports

where available.