Columbia Gas Transmission LLC

Third Revised Volume No. 1

Effective Date: 04/10/2009, Docket: RP09-289-001, Status: Effective

First Revised Sheet No. 117 First Revised Sheet No. 117

Superseding: Original Sheet No. 117

OPT RATE SCHEDULE

OFF-PEAK FIRM TRANSPORTATION SERVICE (Cont'd)

(1) A day of interruption shall be deducted from Shipper's number of remaining days of

allowable interruption for each Day upon which Shipper is allocated a level of capacity equivalent to

less than 50 percent of Shipper's nominated quantity.

(2) A half day of interruption shall be deemed to have occurred and shall be deducted from

Shipper's number of remaining days of allowable interruption on any Day on which Transporter notifies

Shipper that Transporter will be able to render service at a level equal to or greater than 50 percent,

but less than 100 percent, of Shipper's nominated quantity; provided, however, that a full day of

interruption shall be deducted from Shipper's number of remaining days of allowable interruption if, on

any Day on which Transporter makes less than Shipper's full Transportation Demand available, Shipper

actually utilizes less than 50 percent of its nominated quantity.

(3) A day of interruption shall be deducted from Shipper's number of remaining days of

allowable interruption for each Day Shipper does not submit a nomination for this service following

notification by Transporter twenty-four (24) hours in advance of the Gas Day that Transporter will be

unable to render service up to the level of Transportation Demand specified in the OPT Service

Agreement.

(e) If Transporter provides advance notice that service under this Rate Schedule will not be

available, Shipper will not be entitled to a day of interruption if Shipper nominates and is allocated its

full Transportation Demand. Days of interruption when Shipper nominates and is allocated less than its full

Transportation Demand shall be determined in accordance with Section 3 (d), above.

(f) If circumstances beyond Transporter's control mandate interruptions of service in excess of the

number of days of allowable interruption stated in Shipper's OPT Service Agreement, Transporter shall provide

a demand charge credit to Shipper for each such additional day of interruption. That credit shall constitute

Shipper's exclusive remedy for any such interruptions.

4. RATE

(a) The charges to be paid by Shipper, as set forth in paragraph (b) below, shall be no higher than

the applicable total effective maximum charges and no lower than the applicable total effective minimum

charges set forth in the currently effective Sheet No. 27 of this Tariff, unless otherwise mutually agreed to

by Transporter and Shipper with respect to the charges identified in Section 4(b) below.

(b) For all service rendered under this Rate Schedule, Shipper each month shall pay Transporter the

charges set forth below, unless otherwise mutually agreed to by Transporter and Shipper with respect to the

charges identified in Section 4(b) below and specified in Shipper's OPT Service Agreement.

(1) Reservation Charge. The maximum Reservation Charge for each Month, assessed on each

Dth of Transportation Demand specified in Shipper's OPT Service Agreement.

(2) Commodity Charge. The maximum Commodity Charge per Dth of gas actually delivered each

Day during the Month to or for the account of Shipper.

(3) Overrun Charge. The applicable Overrun Charge per Dth of gas actually delivered on

any Day during the Month in excess of Shipper's Transportation Demand.

(4) Surcharges. The surcharges applicable to this Rate Schedule.

(5) Processing Charge. If applicable under Section 25.3 of the General Terms and

Conditions, the Processing Charge per Dth of gas processed by Transporter in its gas processing

facilities.