The existence of CO in a car park implies that other dangerous fumes (e.g. benzene) may also be current. As a result of this, the German authorities have lessened the limits for CO in vehicle parking amenities from one hundred ppm to 50-sixty ppm, depending on the federal condition in https://caidenstkzn.shoutmyblog.com/35541301/a-review-of-car-park-ventilation