These links range from basic to highly technical. Hope you find one or more helpful.
http://www.iupac.org/...
http://www.epa.gov/...
http://response.restoration.noaa.gov...
http://unearthed.earthjustice.org/...
http://toxtown.nlm.nih.gov/...
http://www.crrc.unh.edu/...
http://www.nature.nps.gov/...
http://www.worldpress.org/...
http://www.sciencecorps.org/...
http://mtmeyer1.newsvine.com/...
http://etd.lsu.edu/...