Tres Palacios Gas Storage LLC

Original Volume No. 1

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Effective Date: 07/25/2009, Docket: RP09-260-000, Status: Effective

First Revised Sheet No. 226 First Revised Sheet No. 226

Superseding: Original Sheet No. 226

INTERRUPTIBLE STORAGE SERVICE AGREEMENT

(For Use Under Rate Schedule ISS)

This Agreement is made as of the _______day of _________, ____, by

and between TRES PALACIOS GAS STORAGE LLC, a Delaware limited

liability company herein called "TRES PALACIOS," and

_____________________, an __________________, herein called

"Customer," (each of TRES PALACIOS and Customer, a "Party," and

collectively, the "Parties"), pursuant to the following recitals

and representations:

WHEREAS, TRES PALACIOS owns and operates an underground natural

gas storage facility known as the Tres Palacios Gas Storage

facility, located in Texas, and is authorized to provide natural

gas storage and related services in interstate commerce by way of

the Tres Palacios Gas Storage facility; and

WHEREAS, Customer has requested that TRES PALACIOS provide certain

interruptible natural gas storage services for Customer; and

WHEREAS, TRES PALACIOS has agreed to provide such interruptible

storage services for Customer subject to the terms and conditions

set forth in this Agreement.

NOW, THEREFORE, TRES PALACIOS and Customer agree as follows:

ARTICLE I - SCOPE OF AGREEMENT

Following the commencement of service pursuant to any transaction

hereunder, in accordance with the terms of TRES PALACIOS' Rate

Schedule ISS, and of this Agreement, TRES PALACIOS shall receive

on any Day for injection into storage for Customer's account a

quantity of Gas up to Customer's Maximum Daily Injection Quantity

as set forth on Exhibit "A" hereto, shall store quantities of Gas

so injected in the Tres Palacios Gas Storage LLC underground gas

storage facility located in Texas, up to a Maximum Storage

Quantity as set forth on Exhibit "A" (on a cumulative basis) and

on demand on any Day shall withdraw from Customer's Storage

Inventory and deliver to Customer a quantity of Gas up to

Customer's Maximum Daily Withdrawal Quantity as set forth on

Exhibit "A."

ARTICLE II - POINTS OF RECEIPT AND DELIVERY

The point(s) at which the Gas is to be tendered by Customer to

TRES PALACIOS under this Agreement shall be any of the Point(s) of

Receipt as posted on TRES PALACIOS' Internet Web Site.

The point(s) at which the Gas is to be tendered by TRES PALACIOS

to Customer under this Agreement shall be any of the Point(s) of

Delivery as posted on TRES PALACIOS' Internet Web Site.