Northern Natural Gas Company

Fifth Revised Volume No. 1

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

Fourth Revised Sheet No. 442A Fourth Revised Sheet No. 442A

Superseding: Third Revised Sheet No. 442A

(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 Agreement

Rate Schedule FDD

Term: _________through__________

Shipper:_________________________

Firm Storage Quantity (FSQ): Dth Storage Points:

Option: Gas-In-Place 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:

______________________________________________ _________________________________________________

Daily Maximum Daily Maximum Daily Maximum Daily Maximum

Injection Injection Withdrawal Withdrawal Withdrawal Injection

Period FDQ FDQ Period FDQ FDQ

______________________________________________ _________________________________________________

40% or less * * 75% or more * *

of FSQ +900 per of FSQ

100,000 of GIP

in excess of 0

40% or more * * Less than 75% * *

but less than +150 per but more than +550 per

80% of FSQ 100,000 of GIP 25% of FSQ 100,000 of

in excess of * GIP in excess

of *

80% or more * * 25% or less * *

of FSQ of FSQ +3,670 per

100,000 of GIP

in excess of 0

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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