The presence of CO in a vehicle park suggests that other harmful fumes (e.g. benzene) will also be present. Because of this, the German authorities have diminished the limits for CO in car parking services from one hundred ppm to 50-sixty ppm, dependant upon the federal point out in query. https://troyzrguj.blogunteer.com/35354493/basement-ventilation-can-be-fun-for-anyone