Pine Prairie Energy Center, LLC

Original Volume No. 1

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Effective Date: 09/01/2007, Docket: RP07-563-000, Status: Effective

Original Sheet No. 50 Original Sheet No. 50 : Effective

IB RATE SCHEDULE

INTERRUPTIBLE BALANCING SERVICE

1. AVAILABILITY

This Rate Schedule is available to any Customer for the

purchase of Interruptible balancing service from PPEC, provided

that:

(a) PPEC has determined that it has sufficient

operationally available and uncommitted Interruptible storage

capacity and injection and withdrawal capacity to perform service

Customer has requested;

(b) PPEC has determined that service Customer has

requested will not interfere with efficient operation of its

system or with Higher Priority Service;

(c) Customer and PPEC have executed a Hub Services

Agreement under this Rate Schedule;

(d) Customer accepts responsibility for arranging any

transportation service required for utilization of the balancing

service provided under this Rate Schedule; and

(e) Service under this Rate Schedule may not be

available to the extent that PPEC would be required to construct,

modify, expand or acquire any facilities to enable PPEC to perform

the requested services.

2. APPLICABILITY AND CHARACTER OF SERVICE

This Rate Schedule shall apply to all Interruptible balancing

service rendered by PPEC to Customer through use of PPEC's storage

facility located in Louisiana pursuant to an executed Hub Services

Agreement.

Interruptible balancing service rendered by PPEC to Customer

under this Rate Schedule shall consist of the injection, storage,

and withdrawal of quantities of Gas in order to manage imbalances

created by Customer under the Rate Schedules set forth in this

FERC Gas Tariff. Service under this Rate Schedule includes:

(a) The injection on any Day into storage of Customer's

Gas (less Fuel Reimbursement) up to Customer's Maximum Daily

Injection Quantity ("MDIQ") per Customer's nomination which is the

excess of (i) the quantity of Gas received from Customer at any

Point(s) of Receipt per Customer's nomination(s), minus (ii) the

quantity of Gas delivered for Customer's account to any Point(s)

of Delivery per Customer's nomination(s), provided that all Higher

Priority Service nominations for injection have been satisfied and

that Customer has sufficient capacity available as part of its

Interruptible balancing Maximum Storage Quantity to accommodate

the nominated injection quantity.