3 Chapter 2 ALOHA and ARCHIE: Calculation Methods. Contents Chapter 1 Comparison ALOHA™ and ARCHIE: A 1 System Requirements ALOHA. The discussion presented in this document refers to ALOHA version 5.1 and ARCHIE version 1.0. HAZMAT 93-2 April 1993 Note Areal Locations of Hazardous Atmospheres (ALOHA™) and Automated Resource for Chemical Hazard Evaluation (ARCHIE) are dynamic models that will continue to be refined over time. ALOHA™ and ARCHIE: A Comparison Mary Evans Modeling and Simulation Studies Branch Hazardous Materials Response and Assessment Division Office of Ocean Resources Conservation and Assessment National Oceanic and Atmospheric Administration Seattle, Washington 98115 Report No.