U-T Offshore System, L.L.C.

Third Revised Volume No. 1

Effective Date: 06/01/1997, Docket: RP97-146-001, Status: Effective

Second Revised Sheet No. 6 Second Revised Sheet No. 6 : Superseded

Superseding: First Revised Sheet No. 6

RATE SCHEDULE I

INTERRUPTIBLE OVERRUN

TRANSPORTATION SERVICE

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1. AVAILABILITY

This rate schedule was available to any Shipper in the U-T Line for the transportation

of Gas on an interruptible basis in excess of said Shipper's Currently Effective

Contract Demand, where Shipper had executed a Transportation Agreement with Transporter

as included in Transporter's F.E.R.C. Gas Tariff, Original Volume No. 2 for firm

service.

2. TERMS AND CONDITIONS

Unless the context requires otherwise, the terms and conditions contained in Shipper's

Transportation Agreement with Transporter shall apply to service rendered under this

rate schedule.

3. APPLICABILITY AND CHARACTER OF SERVICE

Pursuant to this rate schedule, Transporter will, to the extent available, utilize

unused capacity in the U-T Line to transport gas tendered for transportation on any day

in excess of Shipper's Currently Effective Contract Demand on an interruptible basis.

Shipper may tender gas to Transporter, at the Point or Points of Receipt, in excess of

Shipper's Currently Effective Contract Demand ("Overrun Gas"). Transporter shall

receive the Overrun Gas at the Point or Points of Receipt and shall redeliver an

Equivalent Volume for the account of Shipper at the Point of Delivery. If at any time

the unused capacity in the U-T Line is insufficient to transport all of Shipper's and

other shippers' Overrun Gas, Transporter will, to the extent possible, allocate a

proportionate share of the Maximum Daily Quantities (MDQ) of said unused capacity among

all shippers having Overrun Gas on the basis of the nominations for such service up to,

but not in excess of, the following volumes per day. Set forth below are the MDQ's

which are available to existing Volume No. 2 Shippers:

Shipper Volume (Dth)

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Petrofina 20,000