https://stnonline.com/news/web-exclusives/item/8604-minutes-to-live-do-
you-measure-carbon-monoxide-levels
This article highlights a death that took place in a bus maintenace shop. But it could have happened in any shop. Maybe even one like at your mine site. It also looks at infiltration of CO gas into aother areas. And the limited time people have to get clear of an area with CO gas build up.
"That was a situation not anticipated by a school bus contractor and it had never happened before," the
