Columbia Gas Transmission LLC

Third Revised Volume No. 1

Effective Date: 03/03/2009, Docket: RP09-340-000, Status: Effective

Original Sheet No. 131 Original Sheet No. 131

ISS RATE SCHEDULE

INTERRUPTIBLE STORAGE SERVICE (Cont'd)

(d) Shipper's aggregate injection quantities shall not exceed Shipper's ISQ, and Shipper's

injection quantities on any Day in the Injection Month shall not exceed Shipper's Maximum Daily Injection

Quantity (MDIQ). Shipper's MDIQ shall be determined by (i) multiplying Shipper's ISQ and the applicable

Storage Gas Loss by 110 percent and (ii) dividing the resulting figure by the number of Days in the Injection

Month.

(e) Transporter shall make available to Shipper for withdrawal, on an interruptible basis,

quantities of gas thermally equivalent to the quantities actually injected for Shipper less Storage Gas Loss.

Shipper may make withdrawals at any time during the term of Shipper's ISS Service Agreement unless otherwise

extended pursuant to Section 5 of this Rate Schedule (the Final Withdrawal Date).

(f) Shipper shall not be permitted to increase its existing flowing quantities under this Rate

Schedule, regardless of the Interruptible Storage Quantity set forth in Shippers's ISS Service Agreement, if

such increase would cause a reduction of existing quantities flowing on Transporter's system under a Service

Agreement between Shipper and Transporter of equal or higher priority.

(g) Shipper shall remain responsible for all property or other taxes associated with the quantities

held for Shipper in storage under this Rate Schedule. Transporter periodically shall report to Shipper the

quantities in storage, allocated by state, to enable Shipper to pay all taxes associated with those storage

quantities. All of Transporter's storage fields shall be treated conjunctively and each Shipper's storage gas

shall be deemed to be proportionally allocated to all of Transporter's storage fields based on total working

gas in storage.

(h) Transporter shall assess Retainage on the transportation from ISS storage to the delivery point

for any quantities stored under this Rate Schedule.

(i) Service rights under an ISS Service Agreement may not be released and assigned.