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. 159 Original Sheet No. 159

MARKWEST PIONEER, L.L.C.

FORM OF SERVICE AGREEMENT

RATE SCHEDULE FT-2

ARTICLE III

RATES AND CHARGES, RATE SCHEDULE AND GENERAL TERMS AND CONDITIONS

3.1. Shipper agrees to and will pay Transporter all applicable rates and charges as

specified in Exhibit A hereto, and agrees to the Production Commitment set forth in

Exhibit B hereto.

3.2. All of the GT&C and provisions of Rate Schedule FT-2 shall be applicable to service

hereunder and shall be made a part hereof.

3.3. Unless otherwise agreed, Shipper agrees that Transporter shall have the unilateral

right to file with the appropriate regulatory authority and make changes effective

in: (i) the rates and charges applicable to Transporter’s Rate Schedule FT-2; (ii)

the terms and conditions of service pursuant to which service hereunder is rendered;

(iii) any provision of the GT&C applicable to service hereunder; and/or (iv) any

other provision related to Shipper’s service that Transporter by law or regulation

is permitted to change. Transporter agrees that Shipper may protest or contest any

such filings or may seek authorization from duly constituted regulatory authorities

for such adjustments of Transporter’s Tariff as may be necessary to ensure that

service hereunder is consistent with applicable law.

3.4. Unless otherwise agreed, Shipper will be assessed the applicable percentages in

Transporter’s Tariff for Fuel and Gas Losses.

ARTICLE IV

RESERVATIONS

Transporter shall have the right to take actions as may be required to preserve the

integrity of Transporter’s pipeline facilities, including maintenance of service to other

firm Shippers.