The existence of CO in an auto park suggests that other dangerous fumes (e.g. benzene) may also be present. As a result of this, the German authorities have lowered the boundaries for CO in automobile parking services from 100 ppm to fifty-60 ppm, with regards to the federal condition in https://sethhynbq.blogozz.com/35691340/rumored-buzz-on-car-park-ventilation