1I civil construction projects: residential buildings, office buildings, hospital wards, old buildings, kindergartens, school classrooms and other construction projects;
Class II civil construction projects: hotels, cultural and entertainment places, bookstores, libraries, exhibition halls, gymnasiums, shopping malls (shops), public transport waiting rooms, hospital waiting rooms, restaurants, barbershops and other public buildings. Building materials and decorative materials selected for civil construction projects must conform to the provisions of this specification. The indoor environmental pollution control of civil construction projects should not only comply with this specification, but also comply with the provisions of the current national mandatory standards. Concentration limit of indoor environmental pollutants in civil construction engineering (GB50325-200 1) Category I of pollutants Radon (Bq/ m3) ≤200≤400 Free formaldehyde (mg/ m3) ≤0.08≤0. 12 benzene (mg/m3) ≤ 0.