ZAP est. 61 The next one, I think is of inter=- This is a series of successive avere= ages of surveys that we have carried out, This 1s for a particular plant and the two carves, one of them is the maximum exposure in the vlant, and the other one is the aver= age exposure. In other words, the maximum average, that is the exposure of the individual who had the maximum average exposure and, as you can see here, this is thirteen thousand integrations per minute per cubic meter of uranium which is on the order of two hundred times the permiase ible level and the average here about 50 times the permissible level when we first went into the pliant. Shown on here are the various things that were dona to correct the conditions, Here we install ventilation and putting in the "“sealing"eystem, At this point “we increased the ventilation because it wasn't quite enough and here we have covered the floor with gratings because this was a rolling mill where the material was being dragced across the floor and a lot of oxide and stuff -why we thought we needed a grating on the floor so that the men wouldn't piok it up and