Northwest Pipeline Corporation

First Revised Volume No. 1-A

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Effective Date: 11/25/1990, Docket: GT91- 5-000, Status: Effective

Original Sheet No. 423 Original Sheet No. 423 : Effective

GENERAL TRANSPORTATION 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 transportation and/or

sales agreement.

Transporter shall attribute the total volume of gas delivered to

Receiving Party each day to each purchase or transportation agreement in

the following sequence as applicable:

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

Nominating Party and Transporter under Transporter's Sales

Rate Schedules.

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

Nominating Party and Transporter under Transporter's Storage

Rate Schedules.

(c) Third - The volume of gas scheduled for delivery by

Nominating Party and Transporter under transportation

agreements for firm transportation.

(d) Fourth - The volume of gas scheduled for delivery by

Nominating Party and Transporter under transportation

agreements for interruptible transportation where Shipper is

not a customer under Transporter's Rate Schedule ODL-1 or

DS-1.

(e) Fifth - The volume of gas scheduled for delivery by

Nominating Party and Transporter under transportation

agreements for interruptible transportation where Receiving

Party is also a customer under Transporter's Rate Schedule

ODL-1 or DS-1.