Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 12/31/9999, Docket: RP00-404-007, Status: Accepted

First Revised Sheet No. 444 First Revised Sheet No. 444 : Superseded

Superseding: First Revised Sheet No. 443

PREFERRED DEFERRED DELIVERY SERVICE AGREEMENT

APPENDIX A

Rate Schedule PDD

Base Contract No.: _____________________

Transaction No.: _______________________

Deal Date: ______________________

Date Confirmation Sent:______________________________

Shipper Name: _____________________________________________________________________

Shipper Contact: ____________________________ Fax No.: _______________________

Account Manager: ____________________________ Phone No.: _____________________

I. Contract Total Quantity (CTQ): _____________________

II. Preferred Daily Quantity (PDQ): _________________

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: ____________________________

Total Transaction Rate: ____________________________

If the rate is discounted and the monthly or daily quantities as set forth herein are

not met by Shipper, the total quantities shall be assessed the maximum PDD charges

set forth in Northern's tariff as revised from time to time unless otherwise agreed

in writing.

V. OTHER PROVISIONS: ___________________________________

NNG Account Manager: ___________________ Customer Signature: ______________________

Fax Number: ___________________