There was a Carbon Monoxide leak at the stone building in Harrison Park Wednesday while kids were participating in a Forest School program.
Carlin Val, who runs the Forest School, says it happened at about 12:30 in the afternoon in the Stone Building.
He notes children were outside the building, making musical instruments at the time, but with the CO leaking inside and outside, he notes some students were close enough to have breathed some in.
Captain Wayne Flood with the Owen Sound Fire Department says the leak was in a heating unit in the wall that was improperly vented.
Flood says Enbridge/Union Gas arrived and shut down a gas line. He notes there was breeze Wednesday that allowed for cross ventilation to clear the CO out.
According to Flood, CO levels were 45 parts per million inside the building, which he says is elevated, but not far above the threshold that sets off a CO alarm (35 ppm).
Flood says 13 kids three adults taken to hospital most likely as a precautionary measure for most. A Grey County spokesperson says five ambulances were used to transport patients.
Flood says He says Enbridge/Union Gas arrived and shut down a gas line and notes there was breeze yesterday that allowed for cross ventilation to clear the CO out.
Meanwhile, Carlin Val says the heating system for the building was inspected and passed at the end of September, 2019. He adds another inspection will take place.
In an email, Val says "This was definitely a serious incident and we will determine the cause of the gas leak and work to ensure it doesn't happen again."
He also notes, "Staff and volunteers did such an amazing job looking after our students and making it a calm and efficient environment. Our forest school students were so great as well, listening to instructions and supporting one another and maintained a positive attitude the entire time." He also thanks Forest School parents.
Editor's note: This story was updated from a previous version to remove information indicating a bus was used to transport patients to hospital that has since been clarified.