UNIT VIII ESSAY2Unit VIII EssayThe U.S. Environmental Protection Agency’s Environmental Technology Verification Program was established in 1995 “to verify the performance of innovative environmental technologies that can be used to monitor, prevent, control, and clean up pollution” (Ashley, Waits, Hartzell & Harten, 2005). Since then “it has become one of the most comprehensive environmental technology testing programs in the world” (Ashley, Waits, Hartzell & Harten, 2005). One of the technologies that the ETV program has verified is Ambient Ammonia Sensors.This technology is important because it monitors the ammonia that is put into the atmosphere from agricultural activities and waste from livestock, high levels of atmospheric ammonia can result in adverse environmental and human health effects. Another technology that was verified by the ETV program is Mercury Continuous Emission Monitors. “Mercury CEMs provide concentration measurements of mercury, which are necessary to gain a better understanding of mercury emission sources, transport, and fate in the environment” (Ashley, Waits, Hartzell & Harten, 2005) obviously this is important because mercury is extremely harmful to humans and hazardous to the environment.An equation used for computing water flow rate from pipe diameter is the Hazen- Williams equation. ?= 0.28 x 𝐶 x?2.63 x ?0.54 where Q = Flow rate, gpm. (gallons per minute) C= Hazen-Williams Coefficient, D = Pipe inside diameter, inch, S = Slope of hydraulic grade line, dimensionless. This equation can be used to design new water distribution pipelines, sewage force mains, or to analyze existing pipe networks. There are many variables than can change the outcome of the equation, pipe diameter, the slope, and pipe roughness can all effect the equation.