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A task-based approach to assessing lead exposure among iron workers engaged in bridge rehabilitation.

Authors
Goldberg-M; Levin-SM; Doucette-JT; Griffin-G
Source
Am J Ind Med 1997 Mar; 31(3):310-318
NIOSHTIC No.
00235220
Abstract
A task based approach was used to assess lead (7439-92-1) exposure among structural steel iron workers engaged in a large, complex bridge rehabilitation project. Task specific and multitask airborne samples were collected using personal monitors, and operation specific and 8 hour time weighted averages were calculated. Of the 279 individual personal breathing zone samples collected, with sampling periods ranging from 10 to 424 minutes, 105 were task specific. Bulk paint samples were also analyzed and found to have lead content ranging from 26.5% to 61.5%, with a mean of 39.1%. Significant differences were seen in exposure levels among the different tasks. Arithmetic mean exposures varied from 1,357 microgram/cubic meter (microg/m3) lead for torch cutting and 989 microg/m3 for scaling to 31 microg/m3 for reaming and 4 microg/m3 for drilling. The specific task data was very different from mean exposure levels. The task based results were compared to the task based exposure levels presented by OSHA in its Lead Exposure in Construction Interim Final Rule, and good general agreement was seen between the two sets of data. The authors conclude that task based data is very useful in exposure assessment and much more precise than full shift and operation based measurements in guiding strategies for worker protection. The findings support the collection of task based data routinely in the evaluation of lead exposure in construction work.
Keywords
NIOSH-Publication; NIOSH-Grant; Neurotoxic-effects; Inorganic-lead; Lead-dust; Occupational-exposure; Task-performance; Time-weighted-average-exposure; Breathing-zone; Exposure-levels; Construction-workers;
CODEN
AJIMD8
CAS No.
7439-92-1
Publication Date
19970301
Document Type
Journal Article
Funding Amount
2937066
Funding Type
Cooperative Agreement; Construction
Fiscal Year
1997
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U60-CCU-306169
Issue of Publication
3
ISSN
0271-3586
Priority Area
Neurotoxic Disorders; Neurotoxic-effects
Source Name
American Journal of Industrial Medicine
State
DC; NY
Performing Organization
Center to Protect Workers' Rights, Washington, DC
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