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].

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sg