MarkWest Pioneer, L.L.C.

Original Volume No. 1

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Effective Date: 12/31/9999, Docket: RP09-367-000, Status: Accepted

Substitute Original Sheet No. 166 Substitute Original Sheet No. 166

Superseding: Original Sheet No. 166






Exhibit B(Continued)


2.3 From the obligations in Section 2.1 above, Shipper expressly reserves the following

rights and quantities of production, but only to the extent necessary to satisfy

such rights and obligations:


2.3.1 The right to operate the Committed Production free from any control by

Transporter including, without limitation, the right (but never the

obligation) to drill new wells, to repair and rework old wells, to plug and

abandon any well and to renew, surrender, release or terminate any lease (in

whole or in part) covering the affected lands;


2.3.2 The right to deliver production to lessors of leases on such lands in

quantities sufficient to fulfill lease obligations from time to time,

including the right to take royalty in kind;


2.3.3 The right to use production for development and operations of such lands,

including (but not limited to) the use of gas for fuel, drilling (including

gas drilling), deepening, reworking, compressing, gas lifting, processing,

treating, cycling, repressuring or other supplemental recovery operations;



2.3.4 The right to treat gas for the removal of contaminants and to process gas

for the extraction of any components other than methane contained therein,

except for such methane reasonably removed in such processing.