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. 75 Original Sheet No. 75

GENERAL TERMS AND CONDITIONS

(Continued)

17.2. Applicability - The ACA surcharge shall be applicable to all transportation

transactions performed by Transporter.

17.3. Basis of the ACA Surcharge - The rates for all transactions shall be

adjusted by a unit charge to recover ACA-related costs. Such unit charge

shall be that increment, adjusted to Transporter’s pressure base and Heating

Value, if required, which has been established by the Commission. The ACA

surcharge shall be applied to the commodity component of rates.

17.4. Filing Procedure - The ACA surcharge shall be filed annually by Transporter

at least thirty (30) days prior to the effective date of charge, as defined

in Section 16.5 below. Any such filing shall become effective on the

effective date of charges hereunder without suspension or refund obligation.

17.5. The effective date of adjustment for each annual charge rate adjustment

filed pursuant to this section shall be October 1 of each year. The ACA

surcharge shall become effective on the effective date of adjustment without

suspension or refund obligation.

17.6. Transporter shall retain all revenues collected under this section. Except

as provided by this section, Transporter shall not have the right to seek to

recover in any proceeding under Section 4 of the NGA any annual charges

recorded in its FERC Account No. 928.

17.7. Payment. Transporter shall remit to the Commission, within 45 days of the

issuance of the bill by the Commission, payment of the annual charge

assessed Transporter unless Transporter has filed a petition under 18 C.F.R.

§382.105. Payment must be made to the United States Treasury.