NOTICE DATE: July 6, 2009

NOTICE TYPE: M-A070609-01 Outage – Mospublic.ercot.com

SHORT DESCRIPTION: MOS Public outage Saturday, July 4, 2009.

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: July 4, 2009, from 6:07 AM to 8:25 AM

LONG DESCRIPTION: The MOS Public functionality of the ERCOT Website experienced an outage in service from 6:07 AM to 8:25 AM on Saturday, July 4, 2009. The root cause is being investigated.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via e-mail at [log in to unmask].

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