A bund consists of: an impervious bund wall or embankment surrounding the facility or tanks. an impervious floor within the bunded area. any joints in the floor or the wall, or between the floor and the wall.
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The Federal Trade Commission guidelines suggest that buyers get a receipt from the seller that includes vital information about their purchase such as the condition of the turquoise they are buying, the mine it came from and whether or not the color is natural or dyed.