EPA ALLEGES THAT SUNOCO, INC, AS OWNER AND OPERATOR OF THE MARCUS HOOK REFINERY, IN MARCUS HOOK, PA, FAILED TO PROVIDE IMMEDIATE NOTIFICATION TO THE NRC, SERC, AND LEPC FOLLOWING TWO NITROGEN OXIDE RELEASES IN AMOUNTS GREATER THAN THE REPORTABLE QUANTITY. THE RELEASES OCCURRED ON MAY 22, 2010 AND DECEMBER 14-15, 2010.