Exhibit 10.1

MASTER AGREEMENT FOR THE ASSIGNMENT OF SERVICE

Master Agreement for the Assignment of Service ("Assignment Agreement") between
NOVA Corporation of Alberta ("Company") and Pacific Gas and Electric Company
("Customer").

Whereas Company and Customer are parties to one or more Service Agreements for
Service under Company's Gas Transportation Tariff as amended, revised or
replaced from time to time (the "Tariff") and

Whereas from time to time Customer will be a party to assignments of Service,
as assignee or assignor.

In consideration of the terms and conditions contained in this Assignment
Agreement and the Tariff, Company and Customer agree as follows:

1. Terms used in this Assignment Agreement shall have the same
meanings as are ascribed to them in the Tariff unless otherwise
defined herein. If there is any conflict between this Assignment
Agreement and the Tariff, the Tariff shall govern.

2. Each assignment ("Assignment") of Service occurring on or after the
effective date of this Assignment Agreement shall be carried out in
accordance with and governed by this Assignment Agreement and the
Tariff.

3(a). Subject to paragraph 3(b), for each Assignment approved by Company
a schedule ("Assignment Schedule") will be prepared by Company in
the form attached as Schedule "A" for permanent assignments or
Schedule "B" temporary assignments.

3(b). In the case of multiple Assignments at one time, Company shall not
be required to prepare an Assignment Schedule for each Assignment
but may instead prepare an appendix to the Assignment Schedule
("Appendix 1") detailing the Assignments. The Assignment Schedule
shall apply to each Assigned Service listed in the Appendix 1 and
the Appendix 1 shall be incorporated into, and form part of, the
Assignment Schedule to which it is attached.

4. Fully executed Assignment Schedules shall be incorporated in and
form part of this Assignment Agreement.

5. Upon executing an Assignment Schedule, Company consents to the
assignment of the Assigned Service and releases Assignor from any
obligations and liabilities

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under the Assignor Service Agreement relating to the Assigned
Service which arise or accrue after the Effective Time, and in
the case of a temporary assignment, before the Reversion Time.
The terms "Assigned Service," "Assignor," "Assignor Service
Agreement," "Effective Time" and "Reversion Time" used in this
paragraph shall have the meaning ascribed to them in the
Assignment Schedule in question.

6. Company may from time to time amend this Assignment Agreement by
providing written notice to Customer. The effective date of
amendment shall be the date of receipt by Customer of the notice.
Any such amendment shall only apply to Assignment Schedules
executed after the effective date of the amendment.

7. Company and Customer shall perform such further acts, execute such
further documents and give such further assurances as may be
reasonably required to give effect to this Assignment Agreement.

8. Company may request that Customer as assignee provide Company with
a performance bond, irrevocable Letter of Credit or other security
acceptable to Company (the "security") as a condition precedent to
Company approving any Assignment.

9. Customer shall not assign this Assignment Agreement or any
Assignment Schedule without the prior written consent of Company.

10. Assignment Schedules may be executed in counterparts and may be
provided to Company by fax. If an Assignment Schedule is provided
to Company by fax an original copy shall be provided as soon
thereafter as reasonably possible and if there are any differences
between the two, the fax copy shall govern.

11. Notices by Customer or Company under this Assignment Agreement
shall be provided in accordance with Customer's Service Agreement.

12. This Assignment Agreement shall enure to the benefit of and be
binding upon Company and its successors and assigns and Customer
and its successors and permitted assigns.

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In witness whereof the parties hereto have executed this Assignment Agreement
by their proper signing officers duly authorized in that behalf all as of the
first day of September, 1993.

Pacific Gas and Electric NOVA Corporation of Alberta
Company

Per: Daniel Thomas Per: R. A. Green

Per:_______________ Per: Klaus Exner

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SCHEDULE "A"
93-32975-1 (A&S)
93-35628-0 (PACIFIC)

Assignor: ALBERTA AND SOUTHERN GAS CO. LTD.

Assignor Service Agreement: June 14, 1960

Assignor Assignment Agreement: February 1, 1993

Assignee: PACIFIC GAS AND ELECTRIC COMPANY

Assignee Service Agreement: October 1, 1993

Assignee Assignment Agreement: October 1, 1993

Effective Time: 08:00 MST on November 1, 1993

DESCRIPTION OF ASSIGNED SERVICE:

MAXIMUM SURCHARGE
SCHEDULE RECEIPT/ RECEIPT MAXIMUM DAILY (per 10(3)M(3)/d OF
OF DELIVERY DELIVERY RECEIPT/DELIVERY SERVICE RECEIPT POINT
SERVICE POINT & LEGAL PRESSURE VOLUME TERMINATION CONTRACT DEMAND
NO. STATION NO. DESCRIPTION (kPa) (10(3)M(3)/d) DATE QUANTITY)

93-34739-1 Alberta-BC NW 11-008-05 N/A 17275.0 October 31, 2001 N/A
Border #2001 WSM

THE ASSIGNED SERVICE IS SUBJECT TO THE ADDITIONAL CONDITIONS ATTACHED AS
APPENDIX 1. N/A

ASSIGNOR AND ASSIGNEE AGREE AS FOLLOWS:

1. Subject to the reservations, limitations, and conditions relating to the
Assigned Service and the terms and conditions hereof, Assignor assigns to
Assignee, and Assignee accepts the assignment from the Assignor of, the
Assigned Service as of the Effective Time.

2. Assignee acknowledges that from and after the Effective Time Assignee shall
be bound by and be subject to all of the terms and conditions of the Assigned
Service as set out in the Schedule of Service and the Assigned Service shall be
deemed to be gas transportation service under the Assignee Service Agreement.

3. Assignor and Assignee acknowledge that, from and after the Effective Time,
the Schedule of Service for the Assigned Service shall be deemed to have been
detached from and no longer form part of the Assignor Service Agreement and
shall be deemed to have been attached to and form part of the Assignee Service
Agreement.

4. Upon execution by Company, this Assignment Schedule shall be incorporated
in and form part of the Assignor Assignment Agreement and the Assignee
Assignment Agreement.

5. This assignment is subject to the following terms and conditions: n/a

Alberta and Southern Gas Pacific Gas and NOVA Corporation of
Co. Ltd. Electric Company Alberta

Per: A. Nawata Per:________________ Per: R. A. Green

Per:________________ Per:________________ Per: Klaus Exner

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