Southern Natural Gas Company

Seventh Revised Volume No. 1

Effective Date: 03/01/2001, Docket: RP01-216-000, Status: Effective

Original Sheet No. 98B Original Sheet No. 98B : Effective

(bb) Gigajoule - The standard quantity for nominations, confirmations

and scheduling per gas day in Canada. One gigajoule is equivalent

to 1,000,000,000 joules. For commercial purposes, the standard

conversion factor between dekatherms and gigajoules is 1.055056

gigajoules per dekatherm. The standard joule is the joule

specified in the SI System of Units.

(cc) Gigacalorie - The standard quantity for nominations, confirmations

and scheduling per gas day in Mexico. One gigacalorie is

equivalent to 1,000,000,000 calories. For commercial purposes,

the standard conversion factor between dekatherms and gigacalories

is 0.251996 gigacalories per dekatherm. The reporting basis for

gigacalorie is 1.035646 Kg/cm2 and 15.6 degrees C and dry.

2. INQUIRIES AND CONDITIONS FOR SERVICE

2.1 Any inquiries regarding the availability of transportation service

and the rates charged for such service should be directed to

COMPANY'S Customer Services Department. COMPANY shall inform each

potential shipper inquiring about service as to the availability

of and rates applicable to a particular service and shall mail to

any potential shipper interested in service a copy of COMPANY'S

transportation Rate Schedules, as appropriate, the General Terms

and Conditions, and the transportation rates applicable thereto as

contained in COMPANY'S FERC Gas Tariff, Seventh Revised Volume No.

1. The procedures for submitting valid requests for

transportation service are as follows.