Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 08/01/1997, Docket: RP97-410-000, Status: Effective

First Revised Sheet No. 124 First Revised Sheet No. 124 : Effective

Superseding: Original Sheet No. 124

RATE SCHEDULE IS-1

INTERRUPTIBLE STORAGE SERVICE (Continued)

7. CONDITIONS OF SERVICE

7.1 To qualify for service pursuant to this Rate Schedule, a

potential Shipper shall make a request for storage service

pursuant to the provisions of Section 7 of the General Terms

and Conditions.

7.2 Shipper may be required periodically to update the credit

information originally provided in the Transportation/Storage

Service Request Form.

7.3 In the event gas tendered by Shipper to Transporter for

injection into storage, or the gas withdrawn from storage under

this Rate Schedule, is commingled with other gas, the quantity

injected shall be set equivalent to the gas received into

Transporter's system and the gas withdrawn shall be set

equivalent to the nominated and scheduled quantities.

8. OTHER OPERATING PROVISIONS

8.1 For planning purposes, Transporter may, from time to time,

request estimates from Shipper of the quantities that Shipper

intends to have injected, withdrawn or stored hereunder. In

the event that such a request is made, Shipper shall reply in

writing within 45 days of the request.

8.2 Transporter may request other planning information as needed

from time to time and Shipper shall comply with all reasonable

requests.

9. GENERAL TERMS AND CONDITIONS

The General Terms and Conditions contained in Transporter's Tariff,

except as modified in the Service Agreement, are applicable to this

Rate Schedule and are hereby made a part hereof.

(The rest of this sheet has been intentionally left blank.)