The maximum admissible concentration of selenium in sewage sludge in the UK is 25 mg kg−1 and that in soil after application is 3 mg kg−1 in the UK and 10 mg kg−1 in France and Germany (ICRCL, 1987; From:
Perceived air quality (limit the odor level in the space perceived by the occupants); • Limiting the concentration of specific contaminants; • Predefined ventilation flow rates based on occupation or floor area. Some methods are applicable either for only residential or non-residential buildings...
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Ammonia is one of the most common contaminants in an animal room, particularly for rodents housed in unventilated caging. The odor threshold, where the chemical is barely detectable to 50 percent of people, is around 5 parts per million (ppm), and the Permissible Exposure Limit (PEL) for am...