If you ha ve time & support, EPA offers CAMEO , MARPLOT, and ALOHA, free software - which is intended for the following: (Taken from EPA’s website)
-Stefan Wawzyniecki, CIH, CHMM  ; UConn
CAMEO Chemicals has an extensive chemical database with cr itical response information for thousands of chemicals. There are two prima ry types of datasheets in the database: chemical datasheets and UN/NA datas heets. Chemical datasheets provide physical properties, health hazards, inf ormation about air and water hazards, and recommendations for firefighting, first aid, and spill response. UN/NA datasheets provide response informati on from the Emergency Response Guidebook and shipping information from the Hazardous Materials Table (49 CFR 172.101). In addition to the information on the datasheets, you can also add chemicals to the MyChemicals collection to see what hazards might occur if the chemicals in the collection were mi xed together. CAMEO Chemicals is available online (http://cameochemicals.noaa.gov) and as a downloadab le version.
MARPLOT is the mapping application. It allows users to &q uot;see" their data (e.g., roads, facilities, schools, response assets ), display this information on computer maps, and print the information on area maps. The areas contaminated by potential or actual chemical release s cenarios also can be overlaid on the maps to determine potential impacts. T he maps are created from the U.S. Bureau of Census TIGER/Line files and can be manipulated quickly to show possible hazard areas.
ALOHA is an atmospheric dispersion model used for evaluat ing releases of hazardous chemical vapors. ALOHA allows the user to estimat e the downwind dispersion of a chemical cloud based on the toxicological/ph ysical characteristics of the released chemical, atmospheric conditions, an d specific circumstances of the release. ALOHA can estimate threat zo nes associated with several types of hazardous chemical releases, including toxic gas clouds, fires, and explosions. Threat zones can be plotted on ma ps with MARPLOT to display the location of other facilities storing hazardo us materials and vulnerable locations, such as hospitals and schools. Speci fic information about these locations can be extracted from CAMEO informati on modules to help make decisions about the degree of hazard posed.
I'm interested in doing a survey of chemica l plume/dispersion modeling softwares, which I could then present at a futu re friday lunch presentation at my company.
Specifically, I'm interested in acute atmospheric release, accounting for t opological and urban barriers, of industrial chemicals.
Though, if all we can find are 2 dimensional open plane softwa re examples, it may still be interesting to compare.div>
If anyone has any recommendations, please send them to me on or off list. I'd appreciate any assistance, pointers, or general user feedback re garding these software applications.