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.
COOs oversee the functions and general operations of the company. Actually, this is also one of the major roles of CEOs but when the company is too large, a COO or several COOs are needed to lessen the burden. The COO reports to the CEO. The COO will often be involved in all facets of the CEOâs responsibilities.