Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 11/01/2009, Docket: RP09-1056-000, Status: Effective

Second Revised Sheet No. 31 Second Revised Sheet No. 31

Superseding: First Revised Sheet No. 31

RATE SCHEDULE TI-1

Interruptible Transportation

(Continued)

2. APPLICABILITY AND CHARACTER OF SERVICE (Continued)

transportation (less any fuel use reimbursement furnished in-kind

in accordance with Section 14 of the General Terms and Conditions)

by Transporter to Shipper or for the account of Shipper at the

Delivery Point(s) specified in the executed Service Agreement.

2.3 Character of Services. Transportation service rendered under this

Rate Schedule is interruptible, and subject to curtailment or

interruption at any time as expressly delineated in the General Terms

and Conditions.

3. MONTHLY RATE

Each month, Shipper will pay Transporter for service rendered under

this Rate Schedule the amounts specified in this Section 3, as

applicable.

3.1 Transportation Service. The sum of (a) and (b) below:

(a) An amount obtained by multiplying (i) the quantity of Dth

scheduled for delivery by Transporter to Shipper after

transportation during the month, after reduction for fuel

reimbursement provided in-kind in accordance with Section 14 of

the General Terms and Conditions, by (ii) the Base Tariff

Interruptible Transportation rate as set forth on Sheet No. 5 of

this Tariff. Unless specifically adjusted pursuant to Section 3.2

herein, the Maximum Base Tariff Rate set forth on Sheet No. 5

shall apply.

(b) An amount obtained by multiplying (i) the quantity of Dth

scheduled for delivery by Transporter to Shipper after

transportation during the month, after reduction for fuel use

reimbursement provided in-kind in accordance with Section 14 of

the General Terms and Conditions, by (ii) the ACA component as set

forth on Sheet No. 5 of this Tariff. This charge shall be subject

to adjustment in accordance with Section 16 of the General Terms

and Conditions.