Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 04/30/2010, Docket: RP10-550-000, Status: Effective

First Revised Sheet No. 313 First Revised Sheet No. 313

Superseding: Original Sheet No. 313

FORM OF SERVICE AGREEMENT

APPLICABLE TO ELECTRONIC DATA INTERFACE

APPENDIX A

ELECTRONIC DATA INTERCHANGE TRADING PARTNER AGREEMENT

(DATE) __________

TO BE EFFECTIVE __________ (DATE)

GENERAL PARTY INFORMATION

GAS TRANSMISSION NORTHWEST CORPORATION

717 TEXAS STREET, SUITE 2400

HOUSTON, TEXAS 77002-2761

ATTENTION: ___________________________________________________

(NAME, TITLE)

PHONE: _______________________ FAX: ______________________

OTHER NOTICE METHOD & ADDRESS:

_________________________________________________________________

DUNS NUMBER: _________________________

USER COMPANY NAME: _____________________________________________

STREET ADDRESS: ________________________________________________

CITY: _______________________ STATE/PROVINCE: _____________

ZIP/POSTAL CODE: _____________________

ATTENTION: ____________________________________________________

(NAME, TITLE)

PHONE: ______________________ FAX: _____________________

OTHER NOTICE METHOD & ADDRESS:

_________________________________________________________________

DUNS NUMBER: _________________________

ALLOCATION OF COSTS:

Sender: Pays all costs to get its data to receiving

party's Receipt Computer

Receiver: Pays all costs to retrieve the data

(Continued)