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. 85 Original Sheet No. 85

GENERAL TERMS AND CONDITIONS

(Continued)

22.3.3. Timing of Capacity Releases Exempt from Bidding – For non-biddable

releases, the posting of the Shipper Notice for prearranged deals

not subject to bid are due (Central Time):

a) Timely Cycle – by 10:30 am on a Business Day

b) Evening Cycle – by 5:00 pm on a Business Day

c) Intra-day 1 Cycle – by 9:00 am on a Business Day

d) Intra-day 2 Cycle – by 4:00 pm on a Business Day

The capacity release addendum number will be issued within one hour

of the award posting. Nomination is possible beginning at the next

available nomination cycle for the effective date of the capacity

release addendum.

22.4. Bidding Process

22.4.1. In order to submit a valid bid under this capacity release program,

any party, including a PRS, must be on the approved bidders list.

To be on the approved bidders list, a party must meet the provisions

of this section and have executed a Capacity Release Transportation

Service Agreement with Transporter in the form as set forth in this

Tariff. A party shall remain on the approved bidders list until

such party notified Transporter to the contrary, no longer meets the

credit qualifications in this section, or is suspended from the

approved bidders list in the event and for such time as such party

fails to pay part or all of the amount of any bill for service.