NOTICE DATE: August 14, 2008 NOTICE TYPE: W-A081508-01 Outage - Wholesale CLASSIFICATION: Public SHORT DESCRIPTION: Scheduled Maintenance Outage INTENDED AUDIENCE: All Market Participants DAY AFFECTED: Monday, August 18, 2008 LONG DESCRIPTION: ERCOT has scheduled a maintenance outage for Monday, August 18, 2008 from 9:00 AM to 9:15 AM CPT. The affected applications are listed below: MOSTML Outage Scheduler MOS Public MOS Sender MOS Listener During this brief outage ERCOT systems will not be available to accept market and outage schedules. A subsequent notice will be sent when the maintenance is complete. This outage does not impact other Texas Market Link services. 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] <mailto:[log in to unmask]> . If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com <http://lists.ercot.com/> . Yl/ad