Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 02/21/2009, Docket: RP09-232-000, Status: Effective

Second Revised Sheet No. 462 Second Revised Sheet No. 462

Superseding: First Revised Sheet No. 462

(Placement on page, number of pages, format capitalization and font may vary)

EXHIBIT A

COMPRESSION SERVICE AGREEMENT

CS-1 Rate Schedule

Shipper: ______________________

Term: __________through________

Volumes

Exhibit A Volume:

Period MDQ/day

____________________ ____________________

____________________ ____________________

____________________ ____________________

____________________ ____________________

____________________ ____________________

Fees:

Compression fee:

_____ per Dth

Compression fee - Additional Gas Volumes

_____ per Dth

Receipt Point Pressure Minimum________psig [When operationally required by Northern]

Delivery Point Pressure Minimum_______psig