This report examines, by theory and by analysis of real structures, the reductions in intensity inside and outside NFSS buildings that can be brought [ about by decontaminating the accessible surfaces on and around the buildings.Specifically the report presents the theory and applies the theory to nine j different NFSS buildings in order to: 1.Determine the intensity reductions that can be achieved by decontamination methods applied to practical situations involving real physical structures.Determine the intensity reductions that can be achieved when the detector is located inside a structure and when the detector is located outside the I structure. 3.Determine the decontamination costs (equipment, water expended, radiation dose received by the decontamination crews) in achieving the intensity I reductions. 4.Determine the sensitivity of the achieved intensity reduction to the cleaning efficiency of the decontamination operation (ard, therefore, to the type of decontamination method). 5.Determine the relative importance of the various surfaces (roofs, paved f roads, parking lots, etc.) that can be decontaminated to the intensity reduction that can be achieved.

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Operations Research and Economics D:vision .-OCD Review Notic. This report has been reviewed ink the Office of Civil Defense and approved A. " l,'M1TY C•OBES for publication. Approval does not "signify that the contents necessarily .r SP[CIAL reflect the views and policies of the / •Office of Civil Defense.

Recovery Requirements, Structures and Operations Research." Volume I, General Considerations, by Joseph Ryan, Thomas Johnson and Sylvia Walker, reports on the general aspects of the investigations and presents the conclusions and recommendations. Volume II, Development of Analytical. Computer and Systems Mod~ls in Support of Decontamination Analybes, by Joseph Ryan and Thomas Johnson reports on a number of models developed during the course of the contract which can be used to determine the cost and effectiveness of decontaminating municipal areas as well as to study the systems components of a command and control system for municipal decontamination. Volume III, Decontamination Analysis of Selected Sites and Facilities in San Jose, California, by Sylvia Walker, reports the computed cost and effectivenesL of selected strategies of decontamination in San Jose. Volume IV, Decontamination Analysis of Selected Sites and Facilities in Detroit, Michigan, by Joseph Ryan, reports the computed cost and effectiveness of sel2cted strategies of decontamination in Detroit. Volumes II, III, and IV serve to support the general conclusions and recommendations stated in Volume IL