Sandia National Laboratories, under the direction of the Office of Science and Technology, National Institute of Justice, is conducting the Chemical Facility Vulnerability Assessment (CFVA) project, The primary objective of this project is to develop, test and validate a prototype VAM for assessing the security of chemical facilities and transport activities against terrorist or criminal attacks. Sandia leveraged the experience gained from the use and development of VAs in other areas such as dams and critical assets. Although the project is primarily focused on physical security a top-level look was made of transportation-related activities and the facilities' process control systems. The remainder of Us paper will discuss the prototype VAM.