Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 12/31/9999, Docket: RP07-330-000, Status: Accepted

Third Revised Sheet No. 444 Third Revised Sheet No. 444 : Pending

Superseding: Substitute Second Revised Sheet No. 444

PREFERRED DEFERRED DELIVERY SERVICE AGREEMENT

APPENDIX A

Rate Schedule PDD

Base Contract No.: _____________________

Transaction No.: _______________________

Amendment No:_________________[If applicable]

Deal Date: ______________________

Date Confirmation Sent:______________________________

Shipper Name: _____________________________________________________________________

Shipper Contact: ____________________________ Fax No.: _______________________

Account Manager: ____________________________ Phone No.: _____________________

I. Contract Total Quantity (CTQ): _____________________ Dth

II. Preferred Daily Quantity (PDQ): _________________ Dth

Daily Injection Daily Withdrawal

_______________ __________________

POI # Name DRN # Min Max Min Max Date Range

_____ ____ _____ _______ _______ _______ _______ ___________

III. Maximum Total Quantity (MTQ): __________________

INVENTORY BALANCE

POI # Name DRN # Min Max Date Range

_____ ____ _____ _______ _______ ______________

Monthly Injection Monthly Withdrawal

________________ __________________

POI # Name DRN # Min Max Min Max Date Range

_____ ____ _____ _______ ________ _______ _______ ___________

IV. Rates

______________________________________________________________

Injection Charge: ____________________________

Withdrawal Charge: ____________________________

Total Monthly Inventory Charges: ____________________________

Capacity Fee: ____________________________

Annual Rollover Charge:

Total Transaction Rate: ____________________________

[If applicable - Replacing Confirmation] This Confirmation, as amended, supersedes all previous

confirmations applicable to this Transaction.

This shall serve as confirmation of the verbal contract reached between Shipper and Northern. If

you are in agreement with the terms specified herein, please sign the document and fax it back to

the Northern Account Manager listed above at [Fax _______________]. If this Confirmation Notice

does not accurately describe your understanding of our contract, please contact us in writing within

two (2) business days of receipt of this Confirmation. If no objection to this Confirmation is

received, then this Confirmation shall be the final expression of all the terms hereof and shall be

binding and enforceable against Shipper regardless of whether executed by Shipper.