Northwest Pipeline Corporation G P

Fourth Revised Volume No. 1

Effective Date: 01/31/2008, Docket: RP08-130-000, Status: Effective

Original Sheet No. 233 Original Sheet No. 233 : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

15. DETERMINATION OF DELIVERIES AND IMBALANCES

15.1 Determination of Deliveries. This Section applies to those

situations where the gas delivered by Transporter into the facilities of

any Receiving Party is applicable to more than one Service Agreement.

Transporter shall attribute the total volume of gas delivered to

Receiving Party each day to each Service Agreement in the following

sequence as applicable:

(a) First - The volume of gas scheduled for delivery by

Nominating Party and Transporter under firm transportation

Service Agreements.

(b) Second - The volume of gas scheduled for delivery by

Nominating Party and Transporter under interruptible

transportation Service Agreements where Shipper is not the

Receiving Party.

Nominating Party and Transporter under interruptible

transportation Service Agreements where Shipper is the Receiving

Party.

15.2 Imbalances and Penalties at Delivery Points. Penalties and

overrun and underrun charges as described in Sections 15.3 and 15.5 will

be levied by Transporter against the Receiving Party who controls the

facilities into which gas is delivered ("Receiving Party Imbalances")

unless the Receiving Party has executed an OBA with Transporter and that

OBA also covers receipts by Transporter from the Receiving Party. If

the Receiving Party has not executed an OBA and incurs either an overage

or underage in takes from Transporter, due to a failure to take

quantities of gas equivalent to the total of all Nominating Party

nominations for deliveries into its facilities, such penalties and

overrun or underrun charges will be applied as described in this

Section. Such Receiving Party will be responsible for all Receiving

Party Imbalances and associated penalties and charges, regardless of

whether or not the Receiving Party has a Service Agreement with

Transporter. If any Receiving Party has more than one Service Agreement

with Transporter, all Receiving Party Imbalances will be on that Service

Agreement with Receiving Party which is last in the determination of

delivery categories, as per Section 15.1, unless otherwise agreed upon

by the parties.