3. a water distribution system within the cooling tower designed to create as little spray as possible;
4. an effective high efficiency drift eliminator. 5. an enclosure of the area above the cooling tower pond. This will reduce the effects of windage that cause the drift to escape through the sides. It should not be transparent or translucent as sunlight can promote the growth of algae which is conducive for the growth of legionella bacteria.
5. Construction materials shall be non-corrosive, resistant to chemicals (e.g. fibre glass, stainless steel), smooth, non-porous, opaque to sunlight and readily disinfected. Materials used shall not support the growth and proliferation of microorganisms.
6. A drain shall be located at the lowest point of the pond with a drain-down valve so that the entire system can be conveniently and completely drained.
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