This evening the Department responded to the Bridgewater Apartments in the 1100 Block of Albert Rd in the Toby Farms section of Chester Township for the CO Alarm. Squad 17 arrived and investigated the source finding 100ppm of CO in a basement laundry room. Squad 17 Officer (Joyce) assumed the Command, PECO was notified and the building was evacuated by additional crews from @brookhavenfire52 and additional EMS from 17 and 52 were called to assist Crozer EMS. The source was found, isolated, the building ventilated and then turned over to Building Maintenance and PECO.