MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 61 Original Sheet No. 61

GENERAL TERMS AND CONDITIONS

(Continued)

8.5.5 (continued)

have the ability to nominate for several days, months, or years,

provided the nomination begin and end dates are within the terms of

Shipper’s contract. Nominations received after the nomination

deadline shall be scheduled after nominations received before the

nomination deadline. Receiver of nomination initiates confirmation

with the caveat that the receiver of the confirmation may relieve

the obligation of sender to send. The sending party shall adhere to

nomination, confirmation, and scheduling deadlines. The party

receiving the request has the right to waiver the deadline.

8.6. Any change in a daily scheduled quantity implemented during the Day shall

only be recognized pro rata to the fraction of the Day remaining at the time

the change is implemented. Changed daily scheduled quantity shall not

exceed an amount equal to Shipper’s Contracted Capacity multiplied by the

faction of the Day remaining at the time the changes are implemented, nor

less than zero at any point in time. Transporter shall be under no

obligation to accept such revisions for Shipper nominations made under

Transporter’s Interruptible Transportation Service.

8.7. Pursuant to NAESB Standards 1.3.9, 1.3.11, 1.3.13; all nominations,

including Intraday Nominations, shall be based on a daily quantity; thus, an

intra-day nominator need not submit an hourly nomination. Intraday

Nominations shall include an effective date and time. The interconnected

parties shall agree on the hourly flows of the Intraday Nomination, if not

otherwise addressed in the Ft or IT Agreement or Tariff. Intraday

Nominations can be used to request increases or decreases in total flow,

changes to receipt points, or changes to delivery points of scheduled Gas.

Intraday Nominations do not rollover (i.e., Intraday Nominations span one

day only). Intraday Nominations do not replace the remainder of a standing

nomination. There is no need to re-nominate if an Intraday Nomination

modifies an existing nomination.