—— eee The slag or drogs was separated from the remelt and held for analysis, Thirty pounds of aluminum was melted ina gas~fired furnace at a heat of meit, 1400 degreee. The top inoh of the aluminum ingot contained the slag. In order to obtein the worst possible conditions from a potential dust and fune hazard samples the orerations were performed in arenas where no ventilation existed except for natural draft. Air dust samples were taken directly from the remelt crucibles to obtain the worst operating conditions, After remelt, surface measurements were again taken with alnha metere; smears were taken of the ingots and elag where possible and duplicate samples were taken of the ingots and the slab, duplicate drilling samples, please? Could I have the first slide, In the nickel, we have here the conteminated scrap, the remelt nickel, the slag end the National Bureau of Standards 79