Northwest Pipeline Corporation

First Revised Volume No. 1-A

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Effective Date: 04/01/1993, Docket: RP93- 95-000, Status: Effective

Fourth Revised Sheet No. 320 Fourth Revised Sheet No. 320 : Effective

Superseding: Third Revised Sheet No. 320

RATE SCHEDULE TF-1

Firm Transportation

(Continued)

13. ACCOUNT NO. 858 CHARGES

Shippers which receive service under Rate Schedule TF-1 from

delivery points located off the Pacific Gas Transmission Company (PGT)

system will be subject to Account No. 858 demand and commodity charges

in addition to charges otherwise payable under Rate Schedule TF-1. The

purpose of the Account No. 858 charges is to reimburse Transporter, on

an as-billed basis, for Transporter's payment of such charges to PGT.

The Account No. 858 charges shall be calculated and assessed to the

affected Shippers 1/ as set forth in subparagraph (a) and (b) below:

(a) Account No. 858 Commodity Charge: Shipper shall be subject to a

lump sum commodity charge each month that shall be calculated by

multiplying the Commodity Allocation Factor that is described in

(i) below by the total dollar amount contained in (ii) below.

(i) Commodity Allocation Factor: A Commodity Allocation

Factor shall be assigned to each Shipper during a given

month by dividing (1) the total volume, in MMBtu, that

was transported on PGT's system for Rate Schedule TF-1

service for such Shipper by (2) the total volume, in

MMBtu, that was transported for all Shippers on PGT's

system for Rate Schedule ODL-1 and TF-1 service from off-

PGT delivery points.

(ii) The total Account No. 858 Commodity Charges payable by

Transporter to PGT during the month.

(b) Account No. 858 Demand Charge: Shipper shall be subject to a

Fixed Monthly Account No. 858 Demand Charge that shall be

calculated by multiplying the Demand Allocation Factor that is

described in (i) below by the dollar amount set forth in (ii)

below.

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1/ The Rate Schedule TF-1 Account No. 858 charges apply only to the

Washington Water Power Company for deliveries to off-PGT points.