Viking Gas Transmission Company

First Revised Volume No. 1

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Effective Date: 01/01/2006, Docket: RP02-132-009, Status: Effective

Seventh Revised Sheet No. 21 Seventh Revised Sheet No. 21 : Effective

Superseding: Fifth Revised Sheet No. 21

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

1. AVAILABILITY

This Rate Schedule is available for the transportation of natural gas on an

interruptible basis by Company for any Shipper, which has executed an Interruptible

Transportation Agreement wherein Company agrees to transport gas for Shipper's account

up to a specific TQ.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 Interruptible transportation services under this Rate Schedule shall be provided

when and to the extent that Company determines that capacity is available in its

existing facilities without detriment or disadvantage to Company's firm Shippers.

2.2 Company may interrupt service to any Shipper under this Rate Schedule at any time

and without prior notice to the extent required to provide service to any firm

Shipper under Rate Schedules FT-A or LMS. Interruption of service includes

decreasing, suspending, or discontinuing either the receipt or delivery of gas.

Interruption and the allocation of available interruptible capacity shall be in

accordance with Section 3 of the General Terms and Conditions.

2.3 Company shall not be required to install, operate or maintain any additional

facilities in order to provide transportation service under this Rate Schedule.

Further, Company shall not be required to provide any service that threatens the

integrity of its system.

2.4 Company shall not be required to transport gas under this Rate Schedule when the

total quantity of gas scheduled for transportation is less than that required to

operate existing compression facilities necessary to provide such transportation

service.

3. QUALIFICATION FOR SERVICE

3.1 All Shippers requesting new interruptible transportation service must qualify for

service pursuant to Section 22 of the General Terms and Conditions of Company's

FERC Gas Tariff.