Southwest Gas Storage Company

Original Volume No. 1

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Effective Date: 04/01/1999, Docket: CP97-237-001, Status: Effective

First Revised Sheet No. 206 First Revised Sheet No. 206 : Superseded

Superseding: Original Sheet No. 206

RATE SCHEDULE ISS

INTERRUPTIBLE STORAGE SERVICE

FORM OF STORAGE SERVICE AGREEMENT

CONTRACT NO. __________________

This Agreement, made and entered into as of the ____ day of

________________, 19___, by and between Pan Gas Storage Company d/b/a

Southwest Gas Storage Company (þSellerþ) and

_______________________________________ (þBuyerþ). In consideration

of mutual covenants and agreements as herein set forth, both Seller

and Buyer covenant and agree upon the following terms and conditions:

ARTICLE 1 - SERVICE

Seller agrees to inject and withdraw at the interconnection of

Panhandle Eastern Pipe Line Companyþs transmission facilities and

Seller's East Area Storage Facilities and West Area Storage

Facilities, as defined in Sections 6.1 (o) and (p) of Rate Schedule

ISS, respectively, and store on a fully interruptible basis,

quantities of natural gas as described in Section 6.3 of Rate

Schedule ISS. Buyer elects the following:

East Area Storage Facilities:

Maximum Annual Quantity (MAQ): _________________ Dt.

Maximum Injection Quantity (MIQ): _________________ Dt.

Maximum Withdrawal Quantity (MWQ): _________________ Dt.

West Area Storage Facilities:

Maximum Annual Quantity (MAQ): _________________ Dt.

Maximum Injection Quantity (MIQ): _________________ Dt.

Maximum Withdrawal Quantity (MWQ): _________________ Dt.

ARTICLE 2 - TERM

This Agreement shall become effective from the date first stated

above. This Agreement shall remain effective for a term of

______________________________ from the initial date for service and

thereafter shall continue in effect until terminated by Seller or

Buyer upon at