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. 96 Original Sheet No. 96





25.3. Except as otherwise provided herein, any notice, request, or demand

concerning service under any FT or IT Agreement will be posted on

Transporter’s Website. System-wide notices should have a separate category

for notices that are not critical.


25.4. Except as provided otherwise in this Tariff or the FT or IT Agreement,

operational communications may be made by telephone or other mutually

agreeable means without subsequent written confirmation, unless written

confirmation is requested by either party hereto.


25.5. All notices concerning the limitation or interruption or the transportation

of Gas supplies or other similar matters concerning the dispatching of Gas,

which would be effective within 72 hours of the notice shall be provided via

Transporter’s Website. Confirmations shall be given via Internet E-Mail or

direct notification to the party’s Internet URL address, to be chosen by the

affected party and posted on Transporter’s Website.


25.6. Except as otherwise specifically provided in this Tariff, any notice to be

given by Shipper shall be in writing and shall be sufficient if personally

delivered or sent by mail or facsimile transmission (with confirmation of

receipt) to the following address:


MarkWest Pioneer, L.L.C.

1515 Arapahoe Street

Tower 2, Suite 700

Denver, CO 80202-2126


Any notice shall be deemed received on the date delivered if transmitted via

facsimile, telecopied, or personally delivered, or five (5) Days following

deposit in the mail if mailed in the manner set out above. The designation

or address of the party to be notified may be changed at any time by

delivery of written notice of that change to the other party.