Southern Natural Gas Company

Seventh Revised Volume No. 1

Effective Date: 11/29/1999, Docket: RP00- 52-000, Status: Effective

First Revised Sheet No. 67 First Revised Sheet No. 67 : Effective

Superseding: Original Sheet No. 67

RATE SCHEDULE CSS

Contract Storage Service

1. AVAILABILITY

(a) This Rate Schedule is available to any shipper that requests storage of

natural gas on a firm basis from Southern Natural Gas Company

("COMPANY") provided that:

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

storage service requested;

(ii) SHIPPER has complied with the requirements of Section 7 hereof;

and

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

service under this Rate Schedule.

(b) COMPANY will utilize its Muldon Storage Field in Mississippi and/or its

interest in the Bear Creek Storage Field in Louisiana (collectively

"Storage") to provide service under this Rate Schedule.

perform storage services under this Rate Schedule. 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.

(d) SHIPPER is responsible for arranging for the separate transportation of its

gas to and from Storage.

2. APPLICABILITY AND CHARACTER OF SERVICE

(a) This Rate Schedule shall apply to all firm storage services 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 storage service under this Rate Schedule.

(b) The injection and withdrawal of the gas received by COMPANY on

SHIPPER'S behalf for storage under this Rate Schedule shall be on a firm

basis and shall not be subject to interruption, except as provided in Section

2(c) hereof and Sections 8.3 and 15.3 of the General Terms and

Conditions.