MarkWest Pioneer, L.L.C.

Original Volume No. 1

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Effective Date: 07/01/2010, Docket: RP10-807-000, Status: Effective

Fourth Revised Sheet No. 5 Fourth Revised Sheet No. 5

Superseding: Third Revised Sheet No. 5

STATEMENT OF RATES AND CHARGES

Rates Per MMBtu

Maximum 1/ Minimum

Rate Schedule FT-1

Recourse Rates:

Reservation Rate (Per Month) $3.61 $0.00

Commodity Rate $0.0012 $0.0012

Authorized Overrun Rate $0.1198 $0.0012

ACA Charge

Fuel and Gas Loss Retention Percentage 2/ 0.42%

Rate Schedule FT-2

Recourse Rates:

Firm Quantity Charge (Per MMBtu) $0.1198 $0.0012

Authorized Overrun Rate

ACA Charge $0.1198 $0.0012

Fuel and Gas Loss Retention Percentage 2/ 0.42%

Rate Schedule IT

Recourse Rates:

Commodity Rate (Per MMBtu) $0.1198 $0.0012

ACA Charge

Fuel and Gas Loss Retention Percentage 2/ 0.42%

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1 Pursuant to Section 15 of the GT&C, the effective maximum rate for any negotiated rate

transportation agreement is the rate agreed to by the parties.

2 The Fuel and Gas Loss Retention Percentage is determined pursuant to the provisions of

Section 18 of the GT&C.