TABLE 6 PERCENTAGE OF TOTAL EXPOSURE RATE DUE TO SKYSHINEEXPONENTIALLY DISTRIBUTED SOURCES Source .364 MeV a= .33 .662 MeV a 1 meter h = 17.6% 100 meters 23.1% 13.9% 18. 6% Mev 10.1% 13.3% .364 Mev 11. 8% 1.25 Plane Source h = .662 Mev 1.25 Mev 9.5% 8.0% *a-° corresponds to an infinite plane source. - 34 - 23.1% 18. 0% 12.9%