Southwest Gas Storage Company

First Revised Volume No. 1

Effective Date: 05/17/2009, Docket: RP09-514-000, Status: Effective

Third Revised Sheet No. 212 Third Revised Sheet No. 212

Superseding: Second Revised Sheet No. 212

FORM OF AGREEMENT

FOR MESSENGER®

This agreement, executed this _____ day of __________________, ____,

by and between ______________________________________________ ("Messenger®

Subscriber"), and Panhandle Eastern Pipe Line Company, LP, Trunkline Gas

Company, LLC, Sea Robin Pipeline Company, LLC, Trunkline LNG Company, LLC

and Southwest Gas Storage Company ("Pipeline"), witnesseth that for and in

consideration of the mutual covenants and provisions herein contained and

subject to all of the terms, provisions and conditions herein set forth,

Messenger® Subscriber and Pipeline do hereby agree as follows:

ARTICLE I

SCOPE OF AGREEMENT

Pipeline shall make available for use by Messenger® Subscriber

Pipeline's computerized electronic communication service, the Messenger®

system. Messenger® Subscriber may at its option use the Messenger® system

to: (1) execute a contract for new service under applicable Rate

Schedules; (2) execute an amendment of an existing Service Agreement; and

(3) nominate quantities for injection and withdrawal by Pipeline pursuant

to an existing Service Agreement under any of Pipeline's Rate Schedules.

Messenger® Subscriber may also use the Messenger® system to request and

receive from Pipeline such other information as Pipeline may from time to

time make available to Messenger® Subscriber through the Messenger®

system.

ARTICLE II

TERMS AND CONDITIONS

Messenger® Subscriber's use of the Messenger® system shall be in

accordance with and subject to Pipeline's currently effective FERC Gas

Tariff, including any and all applicable provisions of the General Terms

and Conditions (the "General Terms and Conditions") and the terms and

conditions of any relevant Rate Schedules which appear in Pipeline's

currently effective FERC Gas Tariff, all of which terms and conditions are

expressly incorporated by reference herein.