The amount of lead in the blood and tissues, as well as the time course of exposure, determine toxicity. Lead poisoning may be acute (from intense exposure of short duration) or chronic (from repeat low-level exposure over a prolonged period), but the latter is much more common.
The COO is responsible for the daily operation of the company, and routinely reports to the highest ranking executive, usually the chief executive officer (CEO). The COO is usually the second in command at the firm, especially if the highest ranking executive is the Chairman and CEO.
COO vs. CEO. The chief operating officer is typically second in command to the chief executive officer. The chief executive officer's role varies from industry to industry; however, his role generally involves big picture responsibilities such as improving the company's systems of creating and delivering products.ecessity of COOs. Not every company has a chief operating officer -- the position may not be necessary, depending on a company's structure. Some companies have a COO who also serves as chairman who heads the board of directors in establishing a company's mission and goals.