Fume Metal Fever Sec.3

MONITORING AND MEASUREMENT PROCEDURES
• Eight–Hour Exposure Evaluation

Exposure measurements are best taken so the eight–hour exposure is based on a single
eight–hour sample or on two four–hour samples. Several short–time interval samples
(up to 30 minutes) may be used, but are not preferred. The air samples should be
taken by a qualified person using approved collection methods and devices. Take the
samples in the employee’s breathing zone(air that would most nearly represent that
inhaled by the employee).

• Short–Term Exposure Limit (STEL)
Evaluation Take the measurements during periods of maximum expected concentrations of zinc oxide fume. Take a 15–minute sample or a series of consecutive samples totaling 15 minutes. Collect the samples in the employee’s breathing zone (air that would most nearly represent that inhaled by the employee). Take a minimum of three
measurements on one work shift––the highest measurement taken is an estimate of
the person’s exposure.