Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

Effective Date: 07/01/2005, Docket: RP99-518-074, Status: Pending

First Revised Sheet No. 26 First Revised Sheet No. 26 : Pending

Superseding: Original Sheet No. 26

STATEMENT OF EFFECTIVE RATES AND CHARGES

FOR TRANSPORTATION OF NATURAL GAS

(Continued)

NEGOTIATED RATE AGREEMENTS UNDER RATE SCHEDULE ITS-1, PS-1, AND AIS-1

Explanatory Footnotes for Negotiated Rates under Rate Schedule ITS-1, PS-1,

and AIS-1

5/ This agreement is for service under GTN's Rate Schedule PS-1. The fee

charged for service under this agreement shall be determined as follows:

Maximum Allowable Total Quantity to be Parked: 100,000 Dth

Maximum Allowable Daily Quantity to be Parked: 5,000 Dth

Allowable Period to Park Quantities: July 1-31, 2005

Allowable Period to Withdraw Parked Quantities: Jan. 1-31, 2006

Total Charge (assessed October 2004): $125,000*

*The total charge is inclusive of ACA

GTN shall reimburse Occidental $0.50/Dth, up to a maximum 100,000 Dth, for

any difference between the actual parked quantity on Aug. 1, 2005 and the

Maximum Allowable Total Quantity to be parked, applicable to any nominated

and otherwise confirmable quantities GTN was unable to park on its system

during the Allowable Period to Park Quantities. Occidental is obligated to

make nominations on all available nomination cycles during the day to be

eligible for reimbursement. Occidental shall have the right to request on

subsequent days the makeup quantities GTN was unable to park

GTN shall reimburse Occidental $0.50/Dth, up to a maximum 100,000 Dth, for

any quantities not withdrawn from GTN's system by Jan. 31, 2006 due to GTN's

inability to accommodate a nominated and otherwise confirmable withdrawal for

that quantity during the Allowable Period to Withdraw Parked Quantities.

Occidental is obligated to make nominations on all available nomination

cycles during the day to be eligible for reimbursement. Occidental shall

have the right to request on subsequent days the makeup quantities GTN was

unable to withdraw.

Occidental shall use good faith efforts to withdraw all gas parked over a

period of no less than twenty days and with no daily withdrawal exceeding

10,000 Dth without prior approval of GTN.

Any quantities Occidental parks on GTN's system in excess of 100,000 Dth in

July 2005 shall be subject to GTN's maximum tariff rate under Rate Schedule

PS-1. Any quantities withdrawn from GTN's Parking Service in January 2006

shall apply first to the volumes subject to this agreement and second to any

quantities parked outside the bounds of this agreement.

This interruptible service shall be provided to the extent it does not

prevent GTN from meeting all of its firm and other interruptible service