Northern Natural Gas Company

Fifth Revised Volume No. 1

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

Original Sheet No. 442A.01 Original Sheet No. 442A.01

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

Contract No.:_________

Request No.: __________

Amendment No.:_________ [if applicable]

Appendix A

Firm Deferred Delivery Service Agmeement

Rate Schedule FDD

Term: ___________through_____________

Shipper: _______________________________

Firm Storage Quantity (FSQ): Dth Storage Points:

Option: 4-Step Option _______________

Account Balance Parameters:

_____________________________________________ ____________________________________

Injection Period Withdrawal Period

_____________________________________________ ____________________________________

Shipper's account balance may not be Shipper's account balance may not be

greater than * on August 31. less than * on January 31.

Shipper's account balance may not be

greater than * on March 1.

Daily Maximum FDQ:

___________________________________________ ________________________________________

Injection Period Withdrawal Period

___________________________________________ ________________________________________

Daily Maximum Daily Maximum Daily Maximum Daily Maximum

Injection Withdrawal Withdrawal Injection

Period FDQ FDQ Period FDQ FDQ

___________ ______________ ______________ ________ _____________ _______________

June * * November * *

July * * December * *

August * * January * *

September * * February * *

October * * March * *

April * *

May Overrun Overrun

(Interruptible) (Interruptible)

[* Note: Shipper's minimum and maximum quantities are determined based on its FSQ as a

percent of the total FDD annual cycle quantity offered.]

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