Trans-Union Interstate Pipeline, L.P.

Original Volume No. 1

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Effective Date: 02/07/2006, Docket: RP06-217-000, Status: Effective

Original Sheet No. 117 Original Sheet No. 117 : Effective

Monthly Imbalance Imbalance Charge per MMBtu

>3%-7% $25 plus the Daily Index Price

>7%-15% $50 plus the Daily Index Price

>15% $100 plus the Daily Index Price

For purposes of this section, Shipper's monthly imbalance shall

equal the

difference between Shipper's actual cumulative receipts during

OFO operating

conditions and Shipper's actual cumulative deliveries during OFO

operating

conditions stated as a percent of Shipper's actual cumulative

deliveries

during OFO operating condition during the Billing Month.

For purposes of this section, the Daily Index Price shall equal

the high in

the range of prices reported each day for "Texas Gas (entire Z

1)" as

published by Gas Daily. If Gas Daily is no longer published, an

equivalent

index or indicator shall be published on Transporter's Web Site

and this

definition will be revised.

(b) Operational Gas Purchases: If Transporter purchases gas to

maintain

line pack and ensure operational reliability, Transporter will

assess Shipper

a charge equal to (i) Shipper's Net Imbalance (ii) divided by

Total System

Imbalance (iii) multiplied by the total actual cost of gas

purchased by

Transporter. If Transporter assesses Shipper a charge pursuant

to this

section, Transporter shall reduce Shipper's Net Imbalance by a

quantity equal

to (i) Shipper's Net Imbalance (ii) divided by Total System

Imbalance (iii)

multiplied by the total quantity of gas purchased by Transporter.

Notwithstanding the above, Transporter shall not be obligated to

deliver to

Shipper on any day a greater quantity of gas than Transporter has

received

from Shipper on any such day.

(1) For purposes of this section, Shipper's Net Imbalance shall

equal the

net sum of Shipper's monthly imbalances.

(2) For purposes of this section, Total System Imbalance shall

equal the net

sum of all monthly imbalances for all shippers purchasing

transportation

service on Transporter's system.

(c) Contract Termination: Shipper shall coordinate with

Transporter to

reduce to zero, within 60 days of contract termination, Shipper's

Net

Imbalance.