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Table 2 Measurements in the work environment

From: High lead exposure in two leaded bronze ingot foundry workers

Measured results (mg/m3) OEL (TWA, mg/m3) Initial measurement December 9, 2013 Follow-up measurement February 4, 2014
   Primary Operator Assistant Operator Primary Operator* Assistant Operator* Area sample of the melting furnace Area sample of the molding frame
Lead 0.05 0.0073 ND 0.0013 0.0394 0.0310 0.0225
Nickel 0.5 0.0003 ND 0.0002 0.0001 0.0001 ND
Tin 2 0.0036 0.0002 ND ND ND ND
Cooper 1 0.0006 0.0003 0.0032 0.0013 0.0009 ND
  1. ND, not detectable; OEL, occupational exposure limit; TWA, time-weighted average.
  2. * New workers were assigned after the primary operator and his assistant were transferred out of the foundry.
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