Georgetown Fire Co., Inc. was dispatched to assist Sta. 93 and Medic 108 for possible CO Leak in a buisness with 2 patient overcome with CO. Medic 108 CO meter was receiving a reading between 200 to 300 ppm of CO. The fire company responded with Eng. 77-4 & Rescue 77 with Chief Barrett as the OIC. Crews secured utilities and with assistance from Sharp Gas isolated the leak coming from a boiler. Electric PPV was utilized for ventilation till all CO reading were back to within normal limits. A & C-93 along the Medic 108 transported 2 pts. to Beebe Hospital.