These exposures pose risks to firms' cash flows, competitiveness, market value, and financial reporting.

He said that exposure to 50 parts per million over an extended period of time poses a grave risk.

Prolonged exposure to asbestos, a fire retardant used primarily for insulation, poses a risk of cancer and respiratory ailments, scientists say.

It is important to note that normal occupational exposure is rated at 0.07% and does not pose any serious health risks.

Exemptions from the labeling are allowed only when it can be shown that exposure to the product over a lifetime poses "no significant risk."

Health Effects - Lead exposure can pose a serious health risk for infants and children.

Unprotected exposure to Ca(OH) can pose health risks, so should be limited.

Such exposure is a normal part of the human condition and generally poses no adverse health effects.

Extended exposure to concentrations above 20 picocuries per liter of air poses a far greater risk, the agency says, warranting corrective action within months.

If exposure to terminals posed an increased risk, she said, it would be expected to appear in all jobs.