Columbia Gas Transmission LLC

Third Revised Volume No. 1

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Effective Date: 03/03/2009, Docket: RP09-340-000, Status: Effective

Original Sheet No. 510 Original Sheet No. 510

[For OPT Rate Schedule]

Appendix A to Service Agreement No. ____________

Under Rate Schedule OPT

between Columbia Gas Transmission, LLC (Transporter)

and ________________________________________ (Shipper)

(Continued)

___ Yes ___ No (Check applicable blank) Shipper has a contractual right of first refusal equivalent to the right of first refusal set forth from time to time in

Section 4 of the General Terms and Conditions of Transporter's FERC Gas Tariff.

Service pursuant to this Appendix A, Revision No. ____ shall be effective from ______________, 20____ through ________________, 20____.

___ Yes ___ No (Check applicable blank) This Appendix A, Revision No. ____ shall cancel and supersede the previous Appendix A, Revision No. ____ effective as of

_____________, 20__, to the Service Agreement referenced above.

___ Yes ___ No (Check applicable blank) This Service Agreement covers interim capacity sold pursuant to the provisions of General Terms and Conditions Section 4.2(j).

Right of first refusal rights, if any, applicable to this interim capacity are limited as provided for in General Terms and Conditions Section 4.2(j).

With the exception of this Appendix A, Revision No. _____ all other terms and conditions of said Service Agreement shall remain in full force and effect.

(SHIPPER) COLUMBIA GAS TRANSMISSION, LLC

By__________________________________ By______________________________________

Its_________________________________ Its_____________________________________

Date________________________________ Date____________________________________