Southern Natural Gas Company

Seventh Revised Volume No. 1

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Effective Date: 09/22/2004, Docket: RP04-494-000, Status: Effective

Second Revised Sheet No. 365 Second Revised Sheet No. 365 : Effective

Superseding: First Revised Sheet No. 365

FORM OF SERVICE AGREEMENT

UNDER RATE SCHEDULE CSS

(Continued)

Service Agreement No. ____________

EXHIBIT A

Service Primary Evergreen

Type MSQ MDIQ MDWQ Start Primary Notice Evergreen Notice

Storage Point Code (Mcf) (Mcf)(1) (Mcf)(1) Date Term Required Term Required

------------------ ----- ---- -------- -------- ------ -------- -------- --------- ---------

Company's Muldon

Storage Field

located in Monroe

County, Mississippi,

and/or the

Bear Creek Storage

Field located in

Bienville Parish,

Louisiana.

Total Maximum Storage Quantity: ____________ Mcf

By:___________________________________ By:______________________________________

(SHIPPER) SOUTHERN NATURAL GAS COMPANY

Effective Date: __________________________

(1) Shipper's MDIQ and MDWQ shall be subject to adjustment each day based on the quantity of

gas Shipper has in Storage pursuant to the ratchet percentages set forth in Rate Schedule CSS.