At 01:08 hours, the WRFD was dispatched to 330 Hackensack St. for an activated carbon monoxide detector. Firefighters investigated and found 30 ppm of CO in the apartment and 100 ppm in the garages located beneath the unit. Companies ventilated both parts of the structure until the levels were at zero. It is believed a vehicle was running inside the garage for a short period of time, trapping the CO inside. There were no injuries. All units were back in service at 02:20 hours. Test your CO and smoke detectors today!