Environmental conditions at Morrison Busty Colliery, March 1966 to August 1968 (Gravimetric dust concentrations)

The report tabulates the dust concentrations in mg/m3 for the period March 1966 to August 1968 covering the 18th Environmental Survey and the Gravimetric Sampling Trial at Morrison Busty Colliery. The method of converting concentrations previously quoted in particles/cm3 to mg/m3.is described.The concentrations of the total respirable fraction of the airborne dust, and of various mineral constituents, are given for each occupational group. Where estimates have been required to fill gaps in the data, sources are stated.Morrison Busty Colliery had a coalface (all shifts) mean dust concentrationof 4.2 mg/m3 containing 31 per cent ash. The mean quartz concentration was 0.2 mg/m3. “”