Office of Drug & Alcohol Policy & Compliance www.dot.gov/ost/dapc
Pipeline & Hazardous Materials Safety Administration (PHMSA) www.phmsa.dot.gov/regulation/pipeline.html
Federal Motor Carrier Safety Administration (FMCSA) www.fmcsa.dot.gov/safety-security/safety-iniatives/drugs/engtesting.htm
Federal Transit Administration www.fta.dot.gov
The Federal Aviation Administration www.faa.gov/avr/aam
Drug & Alcohol Testing Industry Association (DATIA) www.datia.org
Institute for a Drug-Free Workplace www.drugfreeworkplace.org
The Partnership for a Drug-Free America www.drugfree.org
U.S. Department of Health and Human Services & SAMHSA's National Clearing House for Alcohol & Drug Information
Working Partners foa an Alcohol and Drug-Free Workplace www.dol.gov/asp