Questar Southern Trails Pipeline Company

Original Volume No. 1

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Effective Date: 10/14/2008, Docket: CP99-163-004, Status: Effective

First Revised Sheet No. 23 First Revised Sheet No. 23

Superseding: Original Sheet No. 23

RATE SHCEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

4. REGULATORY FEES

Shipper shall reimburse Southern Trails for all fees required by the

FERC or any other regulatory agency to implement the service provided under

this rate schedule. Southern Trails will issue its statement to Shipper

setting forth the fees paid by Southern Trails to implement the service. The

amount to be reimbursed shall be paid by Shipper with the next payment for

service following receipt of Southern Trails' statement.

5. RECEIPT AND DELIVERY

All receipt and delivery points on Southern Trails' transmission system

are available for use on an interruptible basis by interruptible Shippers upon

nomination.

6. GENERAL TERMS AND CONDITIONS

All of the General Terms and Conditions of this tariff, are applicable

to this rate schedule and are incorporated by reference.