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.
Job Description for Chief Operating Officer (COO) A chief operating officer (COO) is usually the second-highest ranking executive in a corporation. The chief operating officer is in charge of executing daily operations for the company, and is second in responsibility only to the chief executive officer (CEO).