1926.62 (c) PERMISSIBLE EXPOSURE LIMIT
(c)(1) The employer shall assure that no employee
is exposed to lead at concentrations greater than
fifty micrograms per cubic meter of air
(50 ug/m(3)) averaged over an 8-hour period.
(c)(2) If an employee is exposed to lead for more
than 8 hours in any workday the employees'
allowable exposure, as a time weighted
average (TWA) for that day, shall be reduced
according to the following formula: Allowable
employee exposure (in ug/m(3)) =
400 divided by hours worked in the day.
(c)(3) When respirators are used to limit employee
exposure as required under paragraph (c) of
this section and all the requirements of
paragraphs(e)(1) and (f) of this section have
been met, employee exposure may be considered to
be at the level provided by the protection factor
of the respirator for those periods the respirator
is worn. Those periods may be averaged
with exposure levels during periods when
respirators are not worn to determine the
employee's daily TWA exposure.
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