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The Vulnerability Model (VM) is a computer model which simulates hazardous materials spills and computes the consequences to people and property from resulting fires, explosions, or toxic vapors. This report describes recent work performed to prepare the VM for operational use. Four specific tasks or developments are described: (1) Development of the user Interface Module (UIM), and easy-to-use conversational program which enables inexperienced or occasional users to set up and run VM simulations easily and reliably with little or no training, (2) Development of a series of VM output display routines which display the results of VM simulations on CRT terminals or hard copy plotters, (3) Development of ready-to-use Geographical/Demographic files for Los Angeles and New York Harbors (a file for New Orleans already exists), and (4) Performance of a number of VM spill simulations for selected chemicals in Los Angeles and New York Harbors to operationally test the UIM/VM system and to provide a hazard ranking of the selected chemicals.