MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 10 Original Sheet No. 10

RATE SCHEDULE FT-1

1. AVAILABILITY

This Rate Schedule FT-1 is available to any Shipper, provided that:

1.1. Shipper has made a valid request for firm transportation service pursuant to

Section 6 of the General Terms and Conditions (GT&C”) of this Tariff.

1.2. Transporter determines it has available capacity to render the firm

transportation service.

1.3. Any construction, acquisition, or expansion of facilities necessary to

commence and provide the firm transportation service has been completed.

Transporter shall not be obligated to add any facilities or to expand the

capacity of its system in order to provide transportation service to Shipper

pursuant to this Rate Schedule.

1.4. Shipper has executed an agreement pursuant to Rate Schedule FT-1 (“FT-1

Agreement”) with Transporter.

1.5. Shipper has satisfied, and continues to satisfy throughout the term of its

FT-1 Agreement, the creditworthiness criteria in Section 7 of the GT&C of

this Tariff.

1.6. There is no limitation on the number of FT-1 Agreements any one Shipper may

have.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1. Transportation service hereunder will be firm, subject to the availability

of capacity, to the provisions of an FT-1 Agreement, and to the GT&C.

2.2. On each Day during the term of the FT-1 Agreement Shipper shall be entitled

to request service hereunder subject to this Rate Schedule and the GT&C.

Nominations for service shall be made pursuant to Section 8 of the GT&C.