Jay ,
I recommend you take a look at EPI Code at http://www.epicode.com. This is an easy to use dispersion modeling soft ware package that rus circles around CAMEO and the other commercial products .
Jim Johnson

I'm interested in doing a survey of chemical plume/dispersion modeling soft wares, which I could then present at a future friday lunch presentation at m y 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 software examples, it may still be interesting to compare.

If anyone has any recommendations, please send them to me on or off list. I 'd appreciate any assistance, pointers, or general user feedback regarding t hese software applications.

Thanks,
Craig