In the past, the criteria used for washing cars bas been 7 mr/hr, and at a leter tine 20 er/hr (gamma), inside a vehicle. This resulted in vashing about 75 cars (roughly 1/8 of the total monitored) following the seventh and sinth detonations of Upshot-Knothole. Under the recommendations given in Policy IV, the bus mentioned above, but probably none of the cars, would have been vashed. The date given in table IV.b. indicate that if these radiation levels given had been predicted before the fallout, Highways #91 and 93 would have been closed prior to the fallout from the seventh detonation and possibly © highway #93 for the ninth detonation. ATO ~s o)