MarkWest Pioneer, L.L.C.

Original Volume No. 1

Effective Date: 12/31/9999, Docket: RP09-367-000, Status: Accepted

Substitute Original Sheet No. 175 Substitute Original Sheet No. 175

Superseding: Original Sheet No. 175

MARKWEST PIONEER, L.L.C.

FORM OF CAPACITY RELEASE TRANSPORTATION SERVICE AGREEMENT

This Capacity Release Transportation Service Agreement (“Agreement”) is applicable

to firm transportation rights released pursuant to Section 22 of the General Terms and

Conditions (“GT&C”)of Transporter’s FERC Gas Tariff.

This Agreement is made and entered into this _____ day of ____________, ____ by and

between MarkWest Pioneer, L.L.C., hereinafter called “Transporter” and

_____________________, hereinafter variously called “Bidder” or “Replacement Shipper.”

Transporter and Bidder shall be referred to herein individually as “Party” and collectively

as “Parties.”

WHEREAS, Transporter owns and operates an interstate natural Gas transmission system

and provides transportation services for third party shippers on such system;

WHEREAS, Transporter’s Tariff permits shippers under Transporter’s Rate Schedule

FT-1 to release some or all of their transportation rights under the terms and conditions

prescribed in Transporter’s Tariff;

WHEREAS, Bidder desires to enter into prearranged release agreements and/or submit

bidding to acquire transportation rights released by one or more firm shippers and

Transporter’s Tariff requires Bidder to enter into this Agreement as a pre-condition to

prearranged releases or to the submission of any such Bids; and

WHEREAS, Transporter is willing to enter into this Agreement with Bidder and provide

transportation service to Bidder as a Replacement Shipper to the extent it obtains released

transportation rights.

NOW THEREFORE, in consideration of the mutual covenants and agreements as herein set

forth, the Parties agree as follows:

ARTICLE I – PROVISIONS

The definitions found in Section 1 of Transporter’s GT&C are incorporated herein by

reference.