Occupational Safety and Health Administration (OSHA):  http://www.osha.gov
Center for Disease Control:  http://www.cdc.gov
Department of Health and Human Services (HHS):  http://www.os.dhhs.gov
Occupational Health & Safety Magazine Online:  http://www.ohsonline.com
410-612-0374
National Institute for Occupational Safety & Health (NIOSH):  
http://www.cdc.gov/niosh/homepage.html
DOT Drug & Alcohol Testing Regulations:  http://www.dot.gov/ost/dapc/
Maryland Worker's Compensation Commission:  http://www.wcc.state.md.us
Maryland Department of Transportation:  http://www.mdot.state.md.us
Cornell Univ. MSDS Search:  http://www.msds.pdc.cornell.edu/msdsssrcg.asp
Workplace Alcohol & Drug Information:  http://www.health.org/workplace
"Medicine the way it should be...friendly and affordable!"
American College of Occupational and Environmental Medicine
http://www.acoem.org