For additional information regarding heavy metals, please click on the following links.
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9992 http://www.osha.gov/web/dep/chemicaldata/#target http://www.epa.gov/lawsregs/laws/caa.html http://www.epa.gov/lawsregs/laws/cwa.html