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.
Chief operating officers are often described as the vice president of a company, with the CEO serving as president. When a chief executive officer steps down, the chief operating officer may step up into the position. In fact, the COO job often serves as training for the chief executive officer's position.he 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. In contrast, the COO monitors how a company's system of creating and delivering products is functioning.