Retrieve the Federal Code On line at this site.  http://www.access.gpo.gov/nara/cfr/cfr-retrieve.html

EPA History Timeline.  http://www.epa.gov/history/timeline/index.htm

OSHA Home Web Page.                                         http://www.osha.gov/

Government published hazardous substance fact sheets on common substances.  http://www.state.nj.us/health/eoh/rtkweb/rtkhsfs.htm#T

Published Emission Factors - Factor Information REtrieval (FIRE) http://www.epa.gov/ttn/chief/software/fire/index.html

National Oceanic and Atmospheric Restoration - Interesting history on spills, cleanups.  http://response.restoration.noaa.gov/index.html 

Biodiversity and Human Health - interesting web site! http://www.wms.org/biod/

Emergency Response Guidebook - quick reference from the NAERG book, DOT web site.  http://hazmat.dot.gov/erg2000/psnsort.htm