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The Barkley Marathons is a 100 Mile Run and a 60 Mile Fun Run held annually in Frozen Head State Park near Wartburg, Tennessee, in late March or early April. Since the race began in 1986, only 9 runners out of about 700 have finished within the 60-hour cutoff. The course itself, which has changed distance, route, and elevation many times since its inaugural run in 1986, currently consists of a 20-mile (32 km) loop with no aid stations except water at two points along the route and the runner's parked car at the beginning of the loop. Runners of the 100 Mile version run this loop five times, with loops three and four being run in the opposite direction and loop five being runner's choice. Runners of the 60 Mile Fun Run (considered to be harder than Hardrock) complete three circuits of the loop. With 54,200 feet (16,500 m) of accumulated vertical climb, the 100 Mile Run is considered to be one of the more challenging ultramarathons held in the United States, if not the world. In addition to running, competitors must find between nine and 11 books (varies per year) and remove a page from each book as proof of completion. --
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Residential Exposure Assessment: A Source Book is the result of a multiyear effort known as the Residential Exposure Assessment Project (REAP) which was initiated by the Society for Risk Analysis and the International Society of Exposure Analysis. This textbook is the primary product of the REAP and it contains contributions from over 30 professionals from a variety of disciplines such as chemistry, biology, physics, engi neering, industrial hygiene, toxicology, pharmacology, and environmental law, reflecting the diverse knowledge and resources necessary to assess and manage potential exposures occurring in and around the home. Expert working groups were organized for each of the 13 chapters...