NOTICE DATE: May 19, 2008 NOTICE DATE: May 19, 2008 NOTICE TYPE: Informational - Market Participant Default SHORT DESCRIPTION: Market Participant Default and Mass Transition Event INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: May 16, 2008 LONG DESCRIPTION: Pre-Buy Electric, LLC (Pre-Buy), a Qualified Scheduling Entity (QSE) and a Load Serving Entity (LSE) in the ERCOT Region, defaulted under its Agreements with Electric Reliability Council of Texas, Inc. as of 5:00 P.M. on May 16, 2008. Pursuant to Protocol Section 15.1.3, Mass Transition, and Retail Market Guide (RMG) Section 7.11, Mass Customer Transition Process, ERCOT began the Mass Transition of Pre-Buy's customers to the Providers of Last Resort (POLRs) on May 16, 2008. The size of the associated Load is approximately 255 MWhs per day and the total number of ESI IDs involved is approximately 8,400. ERCOT has been working closely with the Public Utility Commission of Texas (PUCT) and affected Market Participants to ensure an efficient and effective transfer of customers. 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] ERCOT's Legal Department is also available should your entity's legal department have any specific questions. You can reach Andrew Gallo ([log in to unmask]) at (512) 225 - 7065 and Chad V. Seely ([log in to unmask]) at (512) 225 - 7035. 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/> . DP/DG Dwight Page Retail Client Services Electric Reliability Council of Texas 512.248.3902 (office) 512.590.5153 (cell) 512.248.6434 (fax) [log in to unmask]