MarkWest Pioneer, L.L.C.

Original Volume No. 1

Effective Date: 04/01/2009, Docket: RP09-321-000, Status: Effective

Original Sheet No. 22 Original Sheet No. 22

RATE SCHEDULE IT

(Continued)

2.3. Shipper’s Receipt Point(s) and Delivery Point(s) shall be designated on

Exhibit A to Shipper’s IT Agreement as mutually agreed with Transporter.

Shipper’s total capacity at the Delivery Point(s) and Receipt Point(s) shall

not exceed Shipper’s Maximum Daily Quantity (‘MDQ”). Shipper’s nominations

at these Receipt Point(s) and Delivery Point(s) shall be subject to the

availability of capacity, and subject to the priorities set forth in

Sections 9 and 10 of the GT&C.

2.4. Pursuant to this Rate Schedule IT and the GT&C of this Tariff, Transporter

will receive at the Receipt Point(s) and deliver at the Delivery Point(s)

for Shipper’s account daily quantities of Gas up to Shipper’s MDQ, less Fuel

and Gas Loss, as specified in Shipper’s IT Agreement.

2.5. Transporter shall have no obligation to receive Gas at the Receipt Points(s)

or deliver Gas at the Delivery Point(s) if the Shipper has failed to make

and properly implement all necessary arrangements on upstream and downstream

systems.

2.6. Transporter shall not be obligated to render service if and for so long as

Shipper is in default under its IT Agreement, or the GT&C.

3. RATES AND CHARGES

3.1. The applicable maximum and minimum Recourse Rates for service under this

Rate Schedule IT are set forth on the currently Statement of Rates and

Charges of this Tariff, and are incorporated herein by reference.

3.2. Unless Transporter and Shipper agree in writing upon a Discounted Rate or a

Negotiated Rate, which shall be identified on Exhibit A to the FT-2

Agreement, the rate applicable to Shipper shall be the applicable maximum

Recourse Rate as set forth on the Statement of Rates and Charges of this

Tariff. Any Negotiated Rate shall be pursuant to and subject to Section 15

of the GT&C.

3.3. Effective as of commencement of service, as provided for in the IT

Agreement, Transporter shall charge and Shipper shall pay for Transportation

under this Rate Schedule each Month or part thereof, if applicable, the

following: