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Time variant exposure analysis (TVEA): a measurement tool for characterizing particulate exposure determinants in construction.

Authors
Kalil-AJ; Woskie-SR; Holcroft-C; Ellenbecker-M; Buchholz-B
Source
J Occup Environ Hyg 2004 Dec; 1(12):816-825
NIOSHTIC No.
20040161
Abstract
A work sampling-based approach, time variant exposure analysis (TVEA), was developed for assessment of determinants for particulate air contaminants in dynamic construction environments. To use TVEA, the field researcher records observations at fixed intervals to systematically survey over 30 potential determinants that could affect exposure to three types of particulate matter: quartz-containing dusts, diesel exhaust, and a general grouping of "other particles" that includes welding fume and wood dust. Two field studies were conducted to address questions of inter-rater reliability (n = 20) and coding interval appropriateness (n = 21) for the TVEA method. At least substantial inter-rater agreement (kappa > 0.60) was obtained for the TVEA variables related to tool or machine use, process, material, source intensity, and source orientation. Kappa values for source direction (0.22-0.38) and number of sources (0.38-0.60) showed comparatively lower agreement for all particulate types. Observation interval appropriateness was analyzed using linear regression to compare a 5-min observation interval "gold standard" with alternate intervals. Regression statistics indicated that while 30 min is an acceptable interval for exposure assessment, 15 min optimizes precision and practicality by ensuring that 95% of all observations differ less than ten percentage points from the "true" values. TVEA is a useful exposure assessment tool for the dynamic construction environment. It is flexible in that only those determinants that are of interest need be coded and the coding interval can be adjusted to accommodate the level of precision desired.
Keywords
Construction-industry; Construction-workers; Construction; Exposure-assessment; Work-environment; Sampling; Sampling-methods; Particulate-sampling-methods; Particulates; Air-contamination; Dust-exposure; Dust-sampling; Dusts; Quartz-dust; Diesel-exhausts; Welding; Wood-dusts; Fumes; Metal-fumes; Tools; Machine-operators; Author Keywords: construction; exposure assessment; particulate matter
Contact
Susan Woskie, Department of Work Environment, One University Avenue, University of Massachusetts Lowell, Lowell, MA 01824
CODEN
JOEHA2
CAS No.
14808-60-7
Publication Date
20041201
Document Type
Journal Article
Email Address
Susan Woskie@uml.edu
Funding Type
Cooperative Agreement; Construction
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U60-CCU-317202
Issue of Publication
12
ISSN
1545-9624
Priority Area
Construction
Source Name
Journal of Occupational and Environmental Hygiene
State
MA; DC; MD
Performing Organization
The Center to Protect Workers' Rights
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