Southern Natural Gas Company

Seventh Revised Volume No. 1

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Effective Date: 03/01/2005, Docket: RP04-523-000, Status: Effective

Fourth Revised Sheet No. 59 Fourth Revised Sheet No. 59 : Effective

Superseding: Third Revised Sheet No. 59

RATE SCHEDULE IT

Interruptible Transportation Service

1. AVAILABILITY

(a) This Rate Schedule is available to any party ("SHIPPER") that requests

transportation of natural gas on an interruptible basis from Southern Natural

Gas Company ("COMPANY") when:

(i) COMPANY has sufficient capacity and is able to provide said

transportation;

(ii) SHIPPER has complied with the requirements of Section 2 of the

General Terms and Conditions applicable to this Rate Schedule; and

(iii)SHIPPER and COMPANY have executed a Service Agreement for

service under this Rate Schedule.

(b) COMPANY shall not be obligated to construct, modify, or acquire facilities

to perform transportation services under this Rate Schedule except that

COMPANY shall construct and install facilities necessary to deliver gas

directly to an end user if SHIPPER meets the requirements set out in Section

36 of the General Terms and Conditions. In the event that COMPANY determines

that it will construct facilities that will result in the expansion of its

pipeline system, COMPANY shall offer the proposed expansion capacity to all

shippers on a non-discriminatory basis.

2. APPLICABILITY AND CHARACTER OF SERVICE

(a) This Rate Schedule shall apply to all interruptible transportation service

rendered by COMPANY for SHIPPER pursuant to Part 284 of the Federal

Energy Regulatory Commission's ("Commission") Regulations and pursuant

to the Service Agreement for transportation service under this Rate Schedule.

(b) The transportation services performed under this Rate Schedule shall be on

an interruptible basis and shall be further subject, in COMPANY'S sole

judgment, to the availability of excess capacity in COMPANY'S pipeline

facilities and to the operating conditions and system requirements of

COMPANY. Interruptible transportation services under this Rate Schedule

shall have a priority subordinate to COMPANY'S firm transportation services

provided pursuant to COMPANY'S Rate Schedules and the General Terms

and Conditions applicable thereto contained in COMPANY'S FERC Gas

Tariff.