Document 5zNzxR42KK9m9X4Qj6e4JjBD

Table 2. Health standards for silica dusts in the work environment and the diagnostic criteria for silicosis in China. Year Regulations Issued by 1956 Temporary health standards for the design of industrial premises (101-56) National Construction Committee Ministry of Health 1979 Temporary health standards for the design of industrial premises (TJ 36-79) Ministry of Health Ministry of Labour National Labour Union Ministry of Finance Ministry of Commerce Ministry of Construction 1985 The measurement methods of dust concentration Ministry of Health in workplaces (GB 5748-85) 1986 National standard of working classification in dust environment (GB 5817-86) The radiological diagnostic criteria and principles of management of pneumoconiosis (GB 5906-86) Ministry of Health Ministry of Labour National Labour Union Ministry of Finance Ministry of Labour 1987 The pathological diagnostic criteria of pneumoconiosis (GB 8783-88) Ministry of Health 19791989 Maximum Allowable Concentrations (MAC) for total dust (mg/m5) Silicon dioxide (SiO,>80%) 1.0 Silicon dioxide (Si02=50-80%) Silicon dioxide (SiO2>10%) (quartz, quartzite etc.) 1.5 2.0 Mixed dusts from fluorspar (SiO,>20%) Mica (SiO2<l0%) * 2.0 4.0 Vermiculite (SiO,<10%) Graphite (SiO><10%) 5.0 6.0 Fur (SiO,<10%) Grinding wheel dust (SiO2<10%) 10.0 10.0 Perlite (SiO,<10%) Silicon Carbide (SiO2<10%) Active carbon 10.0 10.0 10.0 Carbon black 8.0 Titanium dioxide 10.0 Asbestos or dust containing asbestos >10% 2.0 Talc dust containing free silica <10% 4.0 Cement dust containing free silica <10% 6.0 China National Technical Committee of Health Standards (CNTCHS), Ministry of Health, P.R. China Coal dust containing free silica <10% 10.0 Aluminium, aluminium oxide & aluminium alloy dusts 2.0 Tobacco dust & tea dust 3-0 Glass wool & slag wool dusts 5.0 Other dusts 10.0 (refer to mineral or vegetable dusts have a free silica content below 10% and no toxicants)