Southern Natural Gas Company

Seventh Revised Volume No. 1

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Effective Date: 11/01/1993, Docket: RS92- 10-003, Status: Effective

Original Sheet No. 110 Original Sheet No. 110 : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

Related Hydrocarbon Fluids, AGA Report No. 3 -- ANSI/API 2530,

as revised September 1985, and as such report may hereafter be

further revised. Exact measurements of inside diameters of meter

tubes shall be obtained by means of a micrometer to the nearest one-

-thousandth inch. Said volumes shall be corrected for flowing

temperature and specific gravity in accordance with the provisions of

paragraphs (c) and (d) below.

(c) The flowing temperature of the gas shall be determined for the

purpose of measured volume correction. Volume shall be corrected

for each degree of variation in the flowing temperature from 60

degrees Fahrenheit. The flowing temperature will be measured by

RTD's, thermocouples, thermometers, etc. and shall be either (1)

recorded using charts, digital recorders, etc., in which case the tem-

perature at which gas was measured for the period of such record shall

be the arithmetic average of the record during the period of time

during which gas was flowing, or (2) used for on-site flow computations

in electronic flow computers in which case the instantaneous

measurement of temperature will be used in such computations.

Where no temperature measuring device is installed, the temperature

of the gas shall be assumed to be 60 degrees Fahrenheit.

(d) A specific gravity correction shall be applied to measured volumes.

The specific gravity to be used for such correction shall be determined

at an appropriate location by a gravitometer, chromatograph or other

device of standard manufacture and shall be either (1) recorded using

charts, digital recorders, etc., in which case an arithmetic average (to

be determined during the period of time during which flow was

occurring at the location of the specific gravity recorder) of such record

shall be the specific gravity of the gas being measured, or (2) used for

flow computations in electronic flow computers in which case the value

of the specific gravity being measured will be used as appropriate in

such computations. If a specific gravity measuring device is not

installed or available at an