What about our health and safety concern of inhaling and ingesting diesel exhaust to hook up the hose?
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This is one of the biggest advantages of the apparatus-mounted system - it direct source captures the toxic diesel exhaust at the tailpipe.  Therefore, it does not require diesel exhaust inhalation by personnel while hooking up a hose as the rig is backed into the station.  This is commonly referred to as the so-called "bend-over for the back-in" problem.