Abstract
An evaluation of the Chamber Works control program was made relative to the 1967 Threshold Limit Value (ACGIH) for tetraalkyl lead compounds. Results from fixed station samplers throughout the manufacturing areas had not correlated well with routine medical examinations and urinary excretion levels for lead. Similarly, there was no correlation of fixed station results with urinary excretion rates. This suggested that personnel monitoring procedures would be necessary to obtain a valid evaluation of the highly variable ambient work atmosphere. No correlation could be established between personnel and fixed station monitor results; however, the mobile units gave significantly higher values. An approximately linear relationship between breathing zone lead levels and urinary excretion was found when the sum of the weekly average organic and inorganic lead TLV coefficients were related to the corresponding average urine excretion.