TM 5-6635-386-12&Pas dry, moist, wet, and saturated for each test location.Draw "contour" lines between the values to enclose eachgiven value area. A moisture pattern is immediatelyapparent.For additional clarity, color the enclosed areas with aspecific color pencil to designate the various moisturevalues.Intelligent action can now be taken as to where repairsshould 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 lowspot, once the pattern is drawn.1-36. RADIATION SAFETYDensity is not a factor on the roof, therefore the shutterwill be kept closed and gamma radiation beneath thetester is negligible.A typical industrial built-up roof will be more than 8’above head height of occupants of space beneath theroof. Neutron radiation at that distance is less than0.025 mrem/hr. Since the tester is constantly beingmoved from test spot to test spot, there is no radiationdanger presented to occupants of the building duringtesting and no special provisions should be taken forsafety.The operator will take many readings in a day, however,and good practice dictates stepping back from the tester5’ or more while the tester is counting.1-23/(1-24 blank)
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