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. 202D First Revised Sheet No. 202D

Superseding: Original Sheet No. 202D

GENERAL TERMS AND CONDITIONS

(Continued)

1. DEFINITIONS (Continued)

1.38 Operational Flow Order ("OFO"): "An operational flow order is an

order issued to alleviate conditions, inter alia, which threaten or

could threaten the safe operations or system integrity, of the

transportation service provider's system or to maintain operations

required to provide efficient and reliable firm service. Whenever a

Transportation Service Provider experiences these conditions, any

pertinent order should be referred to as an Operational Flow Order."

NAESB WGQ Standard 1.2.6.

1.39 Operational Impact Area: "Operational Impact Area is the term

used to describe a Transportation Service Provider's designation of the

largest possible area(s) on its system in which imbalances have a

similar operational effect." NAESB WGQ Standard 2.2.2. Transporter

designates its entire system, except the laterals under Rate Schedules

TFL-1 and TIL-1, as one Operational Impact Area for purposes of netting

and trading Shipper Imbalances and Receiving Party Imbalances. Each

lateral under Rate Schedules TFL-1 and TIL-1 is designated as an

Operational Impact Area for purposes of netting and trading Shipper

Imbalances and Receiving Party Imbalances.

1.40 Point of Unbundling: With respect to sales provided pursuant to

Section 32, Point of Unbundling means the Clay Basin and/or Jackson

Prairie storage facility receipt point(s) into Transporter's system.

1.41 Pooling Party: Any party utilizing the pooling services outlined

in Section 14.19 of the General Terms and Conditions of this tariff.

1.42 Primary Firm Service Rights: the quantity of Primary Firm Service

Rights pursuant to a Firm Transportation Service Agreement at Receipt

and Delivery Points is the greater of the quantity designated

respectively as "MDQs" and "MDDOs" in such Firm Service Agreement or the

Scheduled Quantity at any receipt or delivery point for the Day on such

Agreement (excluding Scheduled Overrun). The quantity of Primary Firm

Service Rights at any given point on the mainline or on a lateral is the

greater of: