of the surface contamination from the fission products decreases by radioactive decay inversely with the time after the detonation. As a further approximation, the intensity of water contamination decreases by radioactive decay and diffusion inversely with the square of the time after the detonation. This appendix has been designed for reduced security classification in order to permit wide dissemination to all personnel of the command and may be downgraded to RESTRICTED - SECURITY INFORMATION provided all references to Joint Task Force SEVEN and its subordinate units are deleted. Original signed by the Assistant Chief of Staff, J-3 for the Commander Joint Task Force 7 464