MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 38 Original Sheet No. 38

GENERAL TERMS AND CONDITIONS

(Continued)

1.41. “Releasing Shipper” or “Releasor” means a Shipper who holds or acquires firm

capacity rights and who elects to release all or a part of such capacity.

1.42. “Replacement Shipper” means a Shipper who acquires all or part of the rights

to capacity held by a Releasing Shipper under the terms of an effective FT

Agreement, on either a permanent or temporary basis.

1.43. “Reservation Charge” means the reservation charge component of the rate

applicable to service under Rate Schedule FT-1 as specified in Transporter’s

Tariff and the FT-1 Agreement between Shipper and Transporter.

1.44. “Scheduled Quantity” is the quantity of Gas a Shipper nominates for receipt

by Transporter at a Receipt Point and for redelivery by Transporter for

Shipper at a Delivery Point, and that Transporter or Operator schedules for

transportation.

1.45. “Shipper” means a Person who executes an FT Agreement or an IT Agreement

with Transporter for transportation service under any Rate Schedule of

Transporter’s tariff.

1.46. “System” means Transporter’s pipeline, any compression and related

facilities.

1.47. “Tariff” means Transporter’s FERC Gas Tariff, as amended from time to time

by Transporter.

1.48. “Transportation” of Gas means Transporter’s receipt of Gas for Shipper’s

account at the Receipt Point and the delivery, for Shipper’s account, of Gas

at the Delivery Point(s).

1.49. “Transporter” means MarkWest Pioneer, L.L.C.

1.50. “Unauthorized Gas” means volumes of Gas received or delivered for Shipper’s

account that exceeds Shipper’s confirmed nomination.

1.51. “Website” means Transporter’s website located at http: www.markwest.com.

1.52. “Year” means a period of 365 consecutive days, except that any year which

contains the date February 29 shall consist of 366 consecutive days.