Pneumoconiosis Field Research: Environmental Conditions at Fryston Colliery,1970

This report tabulates respirable dust concentrations and compositions at Fryston Colliery for the period 5th April, 1970 to 3rd April, 1971.The colliery had a coalface mean respirable dust concentration of 5.6 mg/m3. The mean ash content of the respirable dust was 42.1 per cent and the mean quartz content 4.5 per cent (concentration 0.25 mg/m3).Total dust concentrations are tabulated and, on average, were seven times as high as respirable dust concentrations.Information regarding methods of working, outputs and manpower is given and the change in sampling method from ‘random collier1 to volunteers carrying their own instruments, which took place during this period is described.