NOTICE DATE: December 18, 2008 NOTICE TYPE: W-A121808-01 Operations SHORT DESCRIPTION: ERCOT Frequency Bias change for 2009 INTENDED AUDIENCE: QSE Operations Personnel DAY AFFECTED: January 5, 2009 until further notice LONG DESCRIPTION: As per the System Operations Procedure, the ERCOT Frequency Bias will be changed to 660 MW/0.1 Hz for the year 2009. The Frequency Bias change to 660 MW/0.1 Hz is effective from January 5, 2009 until further notice. The current ERCOT Frequency Bias of 651 MW/0.1 Hz will remain in effect through January 4, 2009. 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/> . sg