Northern Natural Gas Company

Fifth Revised Volume No. 1

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

Fifth Revised Sheet No. 442 Fifth Revised Sheet No. 442 : Pending

Superseding: Fourth Revised Sheet No. 442

Contract No.:_________

Request No.: __________

Amendment No.:_________ [if applicable]

Appendix A

Firm Deferred Delivery Service Agmeement

Rate Schedule FDD

Term: ___________________________

Shipper: ___________________________

Firm Storage Quantity (FSQ): (Dth) Storage Points:

Option: [applicable 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)

* 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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