Southern Natural Gas Company

Seventh Revised Volume No. 1

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

Original Sheet No. 111 Original Sheet No. 111 : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

appropriate location, then specific gravity shall be determined by a

mutually agreeable method.

(e) The gross heating value shall be determined at an appropriate location,

by a calorimeter, chromatograph or other device of standard

manufacture and shall be either (1) recorded using charts, digital re-

corders, 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 gross heating value recorder) of such record shall be

the gross heating value of the gas being measured, or (2) entered as an

input to electronic flow computers in which case the gross heating

value being measured will be used in the computation of the Btu

content of the gas. If a gross heating value measuring device is not

installed or available at an appropriate location, then the gross heating

value shall be determined by a mutually agreeable method.

5. MEASURING EQUIPMENT

5.1 COMPANY'S Measuring Equipment:

Gas delivered to COMPANY and by COMPANY to or for the account of

SHIPPER shall be measured by meters installed, operated, and maintained

by COMPANY, or such meters as COMPANY causes to be installed,

operated, and maintained, equipped to record daily and hourly deliveries.

Measurement data may be recorded using charts or electronic recorders or

instantaneous flow computations in electronic flow computers. Orifice meter

installations shall conform to the recommendations for design and installation

contained in AGA Report No. 3, as revised September 1985, and as such

report may hereafter be further revised. Turbine meter installations shall

conform to the recommendations for design and installation contained in Gas

Measurement Committee Report No. 7 of the AGA, as published in 1981 and

as such report may be further revised. Positive displacement meter

installations shall conform to generally accepted engineering practices in the

industry.