1-36. RADIATION SAFETY

TM 5-6635-386-12&P as dry, moist, wet, and saturated for each test location. Draw "contour" lines between the values to enclose each given value area. A moisture pattern is immediately apparent. For additional clarity, color the enclosed areas with a specific color pencil to designate the various moisture values. Intelligent action can now be taken as to where repairs should be commenced on the roof and over what area. It may be obvious where the moisture is coming from... flashing, a previously unobserved puncture, crack, or low spot, once the pattern is drawn. 1-36. RADIATION SAFETY Density is not a factor on the roof, therefore the shutter will be kept closed and gamma radiation beneath the tester is negligible. A typical industrial built-up roof will be more than 8’ above head height of occupants of space beneath the roof. Neutron radiation at that distance is less than 0.025 mrem/hr. Since the tester is constantly being moved from test spot to test spot, there is no radiation danger presented to occupants of the building during testing and no special provisions should be taken for safety. The operator will take many readings in a day, however, and good practice dictates stepping back from the tester 5’ or more while the tester is counting. 1-23/(1-24 blank)