Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 11/23/2006, Docket: RP07- 33-000, Status: Effective

Sixth Revised Sheet No. 633 Sixth Revised Sheet No. 633 : Effective

Superseding: Fifth Revised Sheet No. 633

FORM OF SERVICE AGREEMENT

APPLICABLE TO RATE SCHEDULE FS-1 (Continued)

EXHIBIT "A"

to Rate Schedule FS-1 Firm Storage Service Agreement

dated _________________between

WILLISTON BASIN INTERSTATE PIPELINE COMPANY (Transporter) and

________________________ (Shipper)

Effective date of Exhibit "A"_____________________________________

Supersedes Exhibit "A" dated _____________________________________

Maximum Storage Injection Quantity (Equivalent dkt/d) 3/

April _____

May _____

June _____

July _____

August _____

September _____

October _____

Maximum Storage Deliverability Quantity (Equivalent dkt/d) _______ 3/

Maximum Storage Capacity Quantity (Equivalent dkt) _______________

Firm Cycle Quantity (Equivalent dkt) _____________________________

Party on whose behalf transportation service is being provided pursuant to

Section 311 of the NGPA is ______________________.

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