Southern Natural Gas Company

Seventh Revised Volume No. 1

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Effective Date: 01/01/2001, Docket: RP00-514-000, Status: Effective

Second Revised Sheet No. 87 Second Revised Sheet No. 87 : Effective

Superseding: First Revised Sheet No. 87

RATE SCHEDULE ISS

Interruptible Storage Service

(Continued)

(b) SHIPPER and COMPANY may establish uniform nominations of daily

quantities of gas to be injected for SHIPPER'S account under this Rate

Schedule, subject to changes in the accompanying transportation

nominations on behalf of SHIPPER. If a uniform nomination is

established, SHIPPER shall not be required to nominate, or cause to be

nominated, deliveries of gas for injection on a daily basis until it

desires to effect a change in the nominations scheduled by COMPANY for

injection. Notice of a changed nomination shall be given in accordance

with Section 5(a) of this Rate Schedule.

(c) After receiving notice of the nominations requested, or cause to be

requested, by SHIPPER, COMPANY shall advise SHIPPER of the quantities

of gas it will accept for injection into Storage by one (1) hour prior

to the effective time for which the nominations have been made.

Nominated quantities shall be scheduled in accordance with the priorities

established in Section 2(c) above. Subject to Section 8.3 of the General

Terms and Conditions, COMPANY shall not change the quantities of gas it

will inject into Storage on SHIPPER'S behalf during any day of service,

except upon four (4) hours' prior notice to SHIPPER.

(d) The injection of gas by COMPANY and the delivery of gas for SHIPPER'S

account to Storage shall be performed at hourly rates as constant as

operationally feasible throughout the day and the parties shall use best

efforts to achieve such uniform hourly rates of flow.