DAVID -2- contributed by three events. The maximum lm gamma exposure rate measured in 1972 was 5 uR/hr. The mean and range values for the prevalent radionuclides in surface soil samples were: Activity (pCi/g) Mean 239py Range C.05 0.004 - 0.23 90+ 0.55 0.08 - 2.6 137o, 0.39 0.03 - 1.0 60a, 0.03 0.009 - 0.14 Radionuclide No zero points, radioactive material burials, or other radiological hazards are known to exist on DAVID. Cleanup activities will include removal of physical hazards and structures as specified in the Engineering Plan. 4