Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

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

First Revised Sheet No. 202B First Revised Sheet No. 202B

Superseding: Original Sheet No. 202B

GENERAL TERMS AND CONDITIONS

(Continued)

1. DEFINITIONS (Continued)

1.20 Gross Heating Value: The total Btu content for a cubic foot of gas

on a dry basis as determined by calculation from compositional analysis

using physical properties of gases at 14.73 psia and 60 F as prescribed

by the American Gas Association.

1.21 Interruptible Service: Transportation or Storage service which is

defined as interruptible in the Rate Schedule in Transporter's Tariff

applicable to such Shipper's Executed Service Agreement.

1.22 Intra-Day Nomination: "An intra-day nomination is a nomination

submitted after the nomination deadline whose effective time is no

earlier than the beginning of the gas day and runs through the end of

that gas day." NAESB WGQ Standard 1.2.4.

1.23 Mcf: One thousand cubic feet of gas.

1.24 MMBtu: One million Btus. For purposes of this Tariff and

associated Service Agreements, MMBtu and Dth are synonymous.

1.25 Mainline Transportation System: Transporter's mainline(s)

extending generally from the U.S./Canadian border near Sumas, Washington

to a point near Blanco, New Mexico, and all receipt and delivery

laterals and ancillary facilities owned in whole or in part by

Transporter which are utilized to provide jurisdictional transportation

of natural gas.

1.26 Maximum Currently Effective Rate: The rate, including all

applicable surcharges, designated on Sheet Nos. 5, 6, 7 or 8.1 of this

Tariff.

1.27 Maximum Daily Delivery Obligation ("MDDO"): The maximum

quantity of gas Transporter is obligated to deliver to a Shipper at a

specific delivery point designated on an executed firm Service

Agreement.

1.28 Maximum Daily Quantity ("MDQ"): The maximum daily quantity

of gas, expressed in dekatherms, to be delivered by Transporter to

Shipper after transportation, at the Delivery Point(s), after fuel use

reimbursement provided in-kind in accordance with the terms of Section

14 of the General Terms and Conditions.