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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Natural Turquoise. Natural Real Turquoise is the most valuable of all Turquoise. This is the hardest type of Turquoise to find, especially natural American Turquoise from the smaller mom and pop Turquoise mines in the Southwest. There is very little Natural Turquoise left in North America.