Liberty Gas Storage, LLC

Original Volume No. 1

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Effective Date: 04/15/2007, Docket: RP07-357-000, Status: Effective

Original Sheet No. 39 Original Sheet No. 39 : Effective

IBT RATE SCHEDULE INTERRUPTIBLE IMBALANCE TRADING SERVICE

1. AVAILABILITY

This Rate Schedule is available to any Customer for the purchase of

Interruptible imbalance trading service from Liberty, provided that:

(a) Liberty has determined that service Customer has requested will not

interfere with efficient operation of its system or with Higher Priority

Services;

(b) Customer and Liberty have executed a Hub Services Agreement under this

Rate Schedule;

(c) Customer accepts responsibility for arranging any transportation

service required for utilization of the imbalance trading service provided

under this Rate Schedule; and

(d) Service under this Rate Schedule may not be available to the extent

that Liberty

would be required to construct, modify, expand or acquire any facilities to

enable Liberty to perform the requested services.

2. APPLICABILITY AND CHARACTER OF SERVICE

This Rate Schedule shall apply to all Interruptible imbalance trading service

rendered by Liberty to Customer through use of Liberty's storage facility

located in Calcasieu Parish, Louisiana pursuant to an executed Hub Services

Agreement.

Interruptible imbalance trading service rendered by Liberty to Customer under

this Rate Schedule shall consist of the trading of imbalance quantities by

Liberty for Customer at agreed upon Point(s) of Receipt and Delivery on

Liberty's system upon nomination by Customer, and shall also permit the trading

of imbalance quantities among Customers. Liberty shall, on an Interruptible

basis, accept nominations from Customer for Point(s) of Receipt and Point(s) of

Delivery located on Liberty's system for quantities of Gas up to the quantities

set forth in Exhibit B of Customer's Hub Services Agreement, in order to permit

Customer to trade imbalances created under Rate Schedules set forth in this

FERC Gas Tariff. Further, Liberty, on an Interruptible basis, shall permit

Customer with imbalance quantities, upon prior notification to Liberty, to

trade such imbalance quantities with another Customer, up to the quantities set

forth in Exhibit B of Customer's Hub Services Agreement.