NOTICE DATE: June 19, 2008 NOTICE TYPE: M-B061908-01 Operations CLASSIFICATION: Public SHORT DESCRIPTION: All Congestion, including Zonal Congestion, will be managed by Local Congestion management techniques during the System-wide 2-Hour LFC Test INTENDED AUDIENCE: All Market Participants DAY AFFECTED: June 25, 26 and 27, 2008 LONG DESCRIPTION: Local Congestion management techniques will be used to manage all Congestion, including Zonal Congestion, on the day of the System-wide 2-Hour LFC Test. ERCOT will alter the handling of system constraints in Zonal beginning two hours before the start of the System-wide 2-Hour LFC Test continuing until one hour beyond the end of the test, For example, if the 2 Hour test were to run from 9:00 AM to 11:00 AM, Local Congestion management techniques would be used beginning at 7:00 AM through 12:00 PM. ACTION REQUIRED: Please advise operators and other personnel performing Zonal market activities of the change. A notice will be sent each day (June 25, 26 and 27) to inform the market if a test will or will not take place that day. The notice will be sent 3 hours prior to the start of the test. 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] 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