From the National Library of Medicine (National INstitutes of Health) website:
TOXMAP - Maps of facilities which manufacture, process, use, or transport significant amounts of toxic chemicals
Alabama
Florida
Louisiana
New Orleans
Mississippi
Biloxi
Gulfport
Tennessee
GUESS WHAT... ALL OF THIS STUFF IS NOW IN THE WATER in New orleans.
Link: http://sis.nlm.nih.gov/enviro/hurricane.html
Unless it is in sealed containers.