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.
The president is second in command after the CEO (or first in command if there is no CEO), and also usually fills the role of the Chief Operating Officer (COO). Responsibilities The CEO of a company is responsible for the overall strategy, vision, and financial well-being of a company.