MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 37 Original Sheet No. 37

GENERAL TERMS AND CONDITIONS

(Continued)

1.31. “Operational Balancing Agreement” or “OBA” is a contract between parties

which specifies the procedures to manage operating balances at an

interconnect as referenced in Section 13.1 of the GT&C.

1.32. “Operational Flow Order” or “OFO” is an order issued pursuant to Section 12

of the GT&C.

1.33. “Person” means a natural person, sole proprietorship, firm, trust, trustee,

executor, administrator or other legal personal representative, partnership,

limited partnership, joint venture, syndicate, company or corporation with

or without share capital, unincorporated association, regulatory body or

agency, government or governmental agency, authority or entity however

designated or constituted.

1.34. “Prepayment”, with respect to requests for capacity or service, means that

amount of money that must be submitted by a Shipper along with a request for

service. With respect to creditworthiness, prepayment means the advance

payment for transportation services rendered by Transporter.

1.35. “Production Commitment Agreement” means an agreement by which Shipper

dedicates production from the Woodford Shale Production Area for

transportation pursuant to Rate Schedule FT-2.

1.36. “Psia” means pounds per square inch absolute.

1.37. “Psig” means pounds per square inch gauge.

1.38. “Receipt Point” means any point at which Gas is tendered by or for Shipper’s

account. The Receipt Point(s) shall be specified in Shipper’s FT Agreement

or IT Agreement.

1.39. “Recourse Rate” means the applicable maximum and minimum rates stated on the

Statement of Rate and Charges in this Tariff, which shall be applicable

unless Transporter and Shipper agree in writing to a Negotiated Rate or a

Discounted Rate.

1.40. “Released Capacity” means capacity reserved under the terms of an effective

FT Agreement that a Releasing Shipper seeks to release, on either a

permanent or temporary basis.