60 ? ibn ‘ a e a be interesting 1s to visualize the extent .; of an atmospheric survey ina plent, This” 4s one of tha feed production plants, Each one of these represents a separate exposure evaluation. These are the individual people; these numbers re= present the number of people involved in each one of these and several bars repre= sent several successive surveys so that the plant management, when they see this can tell how they are doing with respect to time as well as how they are doing with reo epect to exposure, — Would you run the three of thes through in quick succession, Al, please? This is the :major production people in the plant, The other two are similar people but this is one plant, as a matter of fact, one building in a plant come plex, Ag you can see here, (indicating), they are getting down toward people who are less involved with production, down to the managerial personnel and you can see the way the exposures follow as you get to more ad= ministrative type people as it falla off,