MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 60 Original Sheet No. 60

GENERAL TERMS AND CONDITIONS

(Continued)

8.5.3. The Intraday 1 Nomination Cycle - 10:00 am for nominations leaving

control of the nominating party; 10:15 am for receipt of nominations

by Transporter; 10:30 am to send Quick Response; 1:00 pm for receipt

of completed confirmations by Transporter from upstream and

downstream connected parties; 2:00 pm for Transporter to provide

scheduled quantities to affected Shippers and point operators, and

to provide scheduled quantities to bumped parties (notice to bumped

parties), (Central Clock Time on the Gas day). Scheduled quantities

resulting from Intraday 1 Nominations should be effective at 5:00 pm

on Gas day.

8.5.4. The Intraday 2 Nomination Cycle - 5:00 pm for nominations leaving

control of the nominating party; 5:15 pm for receipt of nominations

by Transporter; 5:30 pm to send Quick Response: 8:00 pm for receipt

of completed confirmations by Transporter from upstream and

downstream connected parties; 9:00 pm for Transporter to provide

scheduled quantities to affected Shippers and point operators

(Central Clock Time on the Gas day). Scheduled quantities resulting

from Intraday 2 Nominations should be effective at 9:00 pm on Gas

day. Bumping is not allowed during the Intraday 2 Nomination Cycle.

8.5.5. In addition to making scheduled quantities information available by

4:30 pm, at the end of each day Transporter shall make available to

Shippers information containing scheduled quantities, including

scheduled intra-day nominations and any other scheduling changes.

All nominations shall include Shipper defined begin dates and end

dates. All nominations excluding Intraday Nominations shall have

rollover options. Specifically, Shippers shall