What is the purpose of biological monitoring?
The purpose of biological monitoring is to
identify workers with elevated blood lead
levels. The data from biological monitoring
are objective evidence of a worker's body
burden from lead exposure, and these data can be
used to follow changes in worker exposure.
Blood lead and zinc protoporphyrin (ZPP) or
free erythrocyte protoporphyrin (FEP) must be
monitored for those workers exposed to lead
at or above the action level, as well as for
employees performing high exposure "trigger
tasks" during initial exposure assessment. In
general, workers in high-risk occupations
should be monitored as often as needed to
prevent adverse health effects. The standard
mandates the blood lead monitoring frequency.
Where should analysis of blood samples be
Analysis of blood samples must be conducted
by a laboratory currently approved by OSHA.
Employers should contact their local
OSHA area office for a current list of approved
labs or visit OSHA's Internet site:
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