Southern Star Central Gas Pipeline, Inc.

Original Volume No. 1

Effective Date: 03/01/2006, Docket: RP06-188-000, Status: Effective

Fourth Revised Sheet No. 141 Fourth Revised Sheet No. 141 : Effective

Superseding: Substitute Third Revised Sheet No. 141

ISS RATE SCHEDULE

Interruptible Storage Service

5. MONTHLY BILL

The bill for storage service during each billing period under this

rate schedule shall be the applicable charges as follows:

(a) (i) The Commodity Charge shall be the product of (1) the sum of

the daily storage balances and (2) the Commodity Rate, plus

any applicable surcharges.

(ii) The Injection Charge shall be the product of (1) the net

daily quantities received for injection and (2) the

Injection Rate, plus any applicable commodity surcharges.

(iii) The Withdrawal Charge shall be the product of (1) the net

daily quantities withdrawn and (2) the Withdrawal Rate, plus

any applicable commodity surcharges.

(iv) Southern Star will not assess commodity surcharges on

deliveries to interfaces or pools when such quantities are

delivered to another downstream transportation agreement

with Southern Star.

(b) The bill shall include any scheduling and balancing charges or

penalties determined pursuant to Section 9 and 10 of the General

Terms and Conditions.

6. STORAGE OPERATIONS

(a) All storage fields will be operated as a pool with Southern Star

retaining full operational control.

(b) Monthly imbalances under all transportation agreements with each

Shipper may be injected into or withdrawn from storage under that

Shipper's storage agreement, as provided in Section 9 of the

General Terms and Conditions, subject to the availability of

storage capacity and working gas, as appropriate, up to the MSQ.

inventory balance.