Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 02/20/2009, Docket: RP09-227-000, Status: Effective

Second Revised Sheet No. 52 Second Revised Sheet No. 52

Superseding: First Revised Sheet No. 52

RATE SCHEDULE SGS-2F

Storage Gas Service - Firm (Continued)

3. MONTHLY RATE (Continued)

3.3 Charges for Capacity Release Service: The rates for capacity

release service are set forth in Sheet No. 7. See Section 22 of the

General Terms and Conditions for information about rates for capacity

release service, including information about acceptable bids. In the

event of a base tariff maximum and/or minimum rate change, the

Replacement Shipper will be obligated to pay:

(a) the lesser of the awarded bid rate and the new maximum base

tariff rate, or the greater of the awarded bid rate and the new

minimum base tariff rate, as applicable, for the remaining term of

the release for capacity release transactions with a term of more

than one year and where the awarded bid rate was not tied to the

maximum rate as it may change from time to time;

(b) the greater of the minimum base tariff rate and the awarded

bid rate for the remaining term of the release for capacity

release transactions with a term of one year or less that take

effect on or before one year from the date on which Transporter is

notified of the release and where the award bid rate was not tied

to the maximum tariff rate; or

new maximum rate for capacity release transactions where the

awarded bid rate was tied to the maximum rate as it may change

from time to time.

For capacity release service subject to demand charges, the

payments by the Replacement Shipper shall be equal to the sum of the

daily product of the accepted Demand Charge bid rate and the Contract

Demand, plus the sum of the daily product of the accepted Capacity

Demand Charge bid rate and the Storage Capacity.

For capacity release service subject to volumetric bid rates, the

payments by the Replacement Shipper shall be equal to the accepted

volumetric bid rate for withdrawals multiplied by the actual volumes

withdrawn each day plus the accepted volumetric bid rate for storage

multiplied by the actual volumes in storage each day.