Southwest Gas Storage Company

First Revised Volume No. 1

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Effective Date: 10/01/2007, Docket: RP07-684-000, Status: Effective

Second Revised Sheet No. 206 Second Revised Sheet No. 206 : Effective

Superseding: First Revised Sheet No. 206

RATE SCHEDULE ISS

INTERRUPTIBLE STORAGE SERVICE

FORM OF STORAGE SERVICE AGREEMENT

CONTRACT NO. _________________

This Agreement, is made and entered into as of the ______ day of

___________________________, _______, by and between Southwest Gas Storage

Company (hereinafter called "Southwest") and ___________________________

_______________________________________ (hereinafter called "Shipper").

In consideration of mutual covenants and agreements as herein set forth,

both Southwest and Shipper covenant and agree upon the following terms

and conditions:

ARTICLE 1 - SERVICE

Southwest agrees to inject and withdraw at the interconnection of

Panhandle Eastern Pipe Line Company, LP's transmission facilities and

Southwest's East Area Storage Facilities and West Area Storage

Facilities, as defined in the General Terms and Conditions, and store

on a fully interruptible basis, Quantities of Natural Gas as described

in Section 2 of Rate Schedule ISS. Shipper elects the following:

East Area Storage Facilities:

Maximum Annual Quantity (MAQ): ___________________ Dt

Maximum Daily Injection Quantity (MIQ): ___________________ Dt

Maximum Daily Withdrawal Quantity (MWQ): ___________________ Dt

West Area Storage Facilities:

Maximum Annual Quantity (MAQ): ___________________ Dt

Maximum Daily Injection Quantity (MIQ): ___________________ Dt

Maximum Daily Withdrawal Quantity (MWQ): ___________________ Dt