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. 48 Original Sheet No. 48

GENERAL TERMS AND CONDITIONS

(Continued)

5. PRESSURES AT RECEIPT AND DELIVERY POINTS

5.1. Unless otherwise agreed between Transporter and Shipper, Shipper shall

delivery Gas to Transporter at the pressure required from time to time to

enable the Gas to enter Transporter’s facilities at the Receipt Point.

Unless otherwise agreed between Transporter and Shipper, Transporter shall

deliver Gas to Shipper at Transporter’s line pressure existing at Delivery

Point, subject to Transporter protecting its operational integrity and

pressure requirements, if any, specified in the FT or IT Agreement.

5.2. Atmospheric Pressure – For purposes of measurement, calculations, and meter

calibration, the average absolute atmospheric (barometric) pressure shall be

based on the actual altitude of each point of measurement irrespective of

variations in natural atmospheric pressure from time to time. In the event

electronic computer measurement is used, the absolute Gas pressure will be

measured directly, using an absolute pressure measuring device for

continuous input to the electronic computer.

6. PROCEDURES FOR REQUESTING SERVICE

6.1. Subject to any conditions set forth in the applicable Rate Schedules, this

section shall govern qualifications for receipt of service under Rate

Schedules FT-1, FT-2 and IT.

6.2. Shipper information: All Shippers requesting service from Transporter must

provide the following information in writing to Transporter.

6.2.1. Shipper’s legal name in full and DUNS number.

6.2.2. Shipper’s mailing address for notices and billing.

6.2.3. Shipper’s street address if different from above.