The unit mg/dscm is used to express the concentration of which in emissions?

The unit mg/dscm is used to express the concentration of which in emissions?

• A. Gaseous pollutants
• B. Water pollutants
• C. Particulate emissions
• D. Soil contaminants

Answer: (C)

mg/dscm expresses how much solid or liquid particles are present in a volume of dry stack gas, making it a mass-per-volume measure that’s normalized to dry conditions. This drying removes the variable influence of moisture, so the concentration truly reflects the amount of particulate matter in the gas, regardless of humidity or moisture content. That’s why this unit is used for particulate emissions: particulates are measured as mass per volume of gas, and drying ensures consistent, comparable values. Gaseous pollutants are typically reported in other forms (such as ppm or mg per volume of gas under reference conditions), while water and soil pollutants use units like mg/L or mg/kg, so mg/dscm is specifically suited for particulates in emissions.

mg/dscm expresses how much solid or liquid particles are present in a volume of dry stack gas, making it a mass-per-volume measure that’s normalized to dry conditions. This drying removes the variable influence of moisture, so the concentration truly reflects the amount of particulate matter in the gas, regardless of humidity or moisture content. That’s why this unit is used for particulate emissions: particulates are measured as mass per volume of gas, and drying ensures consistent, comparable values. Gaseous pollutants are typically reported in other forms (such as ppm or mg per volume of gas under reference conditions), while water and soil pollutants use units like mg/L or mg/kg, so mg/dscm is specifically suited for particulates in emissions.