Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

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Effective Date: 12/01/2009, Docket: RP10-85-000, Status: Effective

First Revised Sheet No. 303A First Revised Sheet No. 303A

Superseding: Original Sheet Sheet No. 303A

FORM OF RATE SCHEDULE TF-1 SERVICE AGREEMENT

(Continued)

[Temporary Capacity Release Replacement Contract Version]

EXHIBIT A (Continued)

4. Customer Category:

a. Large Customer

b. Incremental Expansion Customer: [No]

(or)

[Yes, Columbia Gorge Expansion]

(or)

[Yes, 15-Year Evergreen Expansion]

(or)

[Yes, 25-Year Evergreen Expansion]

5. Transportation Rates:

[Use the version of "Reservation Charge" in "a." which applies.]

a. Awarded Reservation Charge (per Dth of CD):

[Maximum Base Tariff Rate, plus applicable surcharges]

(or)

[$_____, plus applicable surcharges]

(or)

[_____% of Maximum Base Tariff Rate, plus applicable surcharges]

(or)

b. Awarded Volumetric Bid Reservation Charge (per Dth):

[Maximum Base Tariff Rate, plus applicable surcharges]

(or)

[$_____, plus applicable surcharges]

(or)

[_____% of Maximum Base Tariff Rate, plus applicable surcharges]

(or)

[[Maximum Base Tariff Rate,] (or) [$_____,] plus applicable

surcharges, and an amount pursuant to Section 3.3(c) of

Rate Schedule TF-1 using a minimum average load factor

volumetric commitment of _____%]

c. Volumetric Charge (per Dth): [Maximum Base Tariff Rate, plus

applicable surcharges]

(or)

[$_____, plus applicable surcharges]