MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 12 Original Sheet No. 12

RATE SCHEDULE FT-1

(Continued)

3.2. (continued)

Rate shall be pursuant to and subject to Section 15 of the GT&C.

3.3. Effective as of the commencement of service, as provided for in the FT-1

Agreement, Transporter shall charge and Shipper shall pay for Transportation

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

following:

a) The applicable Recourse or Negotiated Reservation Charge;

b) The applicable Recourse or Negotiated Commodity Charge;

c) The Annual Charge Adjustment (“ACA”) set forth on the Statement of

Statement of Rates and Charges;

d) The applicable Authorized Overrun Charge set forth in the Statement

of Rates and Charges;

e) The Fuel and Gas Loss Retention Percentage set forth in the

Statement of Rates and Charges; and

f) Any other charge or surcharge mutually agreed by Transporter and

Shipper or allowed by the Commission as set forth in the Statement

of Rates and Charges.

4. MONTHLY BILL

The Monthly Bill for FT-1 service shall be equal to:

4.1. Reservation Charge: The applicable reservation rate determined under

Section 3 of this Rate Schedule multiplied by the Shipper’s MDQ established

in the FT-1 Agreement (subject to the credit in Section 4.7);

4.2. Commodity Charge: The applicable commodity rate determined under Section 3

of this Rate Schedule multiplied by the MMBtu’s of Gas scheduled for receipt

pursuant to Shipper’s FT-1 Agreement during the billing month;