Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

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Effective Date: 07/01/2006, Docket: RP06-375-000, Status: Effective

Fourth Revised Sheet No. 58 Fourth Revised Sheet No. 58 : Effective

Superseding: Third Revised Sheet No. 58

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

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1. AVAILABILITY

This rate schedule is available to any person, corporation, partnership or any other party

(hereinafter referred to as "Shipper") for the Transportation of gas by Great Lakes Gas

Transmission Limited Partnership (hereinafter referred to as "Transporter"), when:

(a) Transporter has determined that it has sufficient available capacity to perform

interruptible Transportation Service requested by Shipper; and

(b) Shipper and Transporter have executed a Transportation Service Agreement (Agreement) in the

form prescribed under this Rate Schedule IT of Transporter's FERC Gas Tariff, Second

Revised Volume No. 1, for interruptible service under this rate schedule.

2. APPLICABILITY AND CHARACTER OF SERVICE

Transporter shall accept for the account of Shipper at the point(s) of receipt on any Day the

quantity of gas tendered by or for the account of Shipper; provided, however, that Transporter

shall not be obligated to receive on any Day a quantity of gas in excess of the applicable MDQ

specified in the Agreement plus applicable Transporter's Use as determined in Section 27 of the

General Terms & Conditions of this FERC Gas Tariff, Second Revised Volume No. 1. Upon receipt

of such gas for Shipper's account, Transporter shall transport and deliver for the account of

Shipper an Equivalent Quantity of gas at the point(s) of delivery; provided, however,

Transporter shall not be obligated to deliver at any point of delivery on any Day a quantity of

gas in excess of the quantity specified in the Agreement applicable for each delivery point.

Transportation Service rendered under this rate schedule shall be interruptible. The MDQ shall

be specified in the Agreement, and shall be a quantity sufficient to avoid measurement

difficulties relative to small amounts of gas. With respect to commencement of the

Transportation Service, the Transporter may terminate an Agreement for interruptible

Transportation Service, and the Shipper's Request shall be null and void, under the following

circumstances: (1) the Shipper fails to nominate, pursuant to Section 3 of the General Terms

and Conditions of this FERC Gas Tariff, Second Revised Volume No. 1, a quantity of gas for

Transportation, or (2) having nominated a quantity of gas and Transporter having scheduled the

quantity for Transportation pursuant to Section 3 of those General Terms and Conditions, Shipper

fails to tender gas for Transportation on the date it is scheduled. Termination shall be

effective on the later of the date service is projected to commence or (1) fifteen (15) Days

after the Shipper executes the Agreement, (2) the completion of construction of any necessary

facilities, or (3) the issuance of any necessary governmental authorization.

However, the Agreement shall not be terminated, nor shall the Request be null and void, if the

Shipper's inability to nominate or tender is caused by an event of force majeure on

Transporter's system, as defined in Section 10 of the General Terms and Conditions of this FERC

Gas Tariff, Second Revised Volume No. 1.

Delivery of natural gas under this Rate Schedule shall be subject to curtailment or interruption

as provided in Section 11 of the General Terms and Conditions of this FERC Gas Tariff, Second

Revised Volume No. 1.

Commencing on and after the effective date of this tariff provision, abandonment of all service

under this rate schedule and termination of the Agreement occurs upon the expiration of the

primary term of the Agreement. In the event that Shipper does not nominate the Agreement during

any 12 (twelve) consecutive months, Transporter shall have the right to terminate the Agreement.

Transporter shall provide written notice (mail, e-mail, or fax) of such termination. Upon

receipt of Shipper's request, the Agreement will not be terminated.

3. GENERAL TERMS AND CONDITIONS

The General Terms and Conditions of this FERC Gas Tariff, Second Revised Volume No. 1, are

applicable and made a part of this rate schedule.