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Wood dust sampling: field evaluation of personal samplers when large particles are present.

Authors
Lee-T; Harper-M; Slaven-JE; Lee-K; Rando-RJ; Maples-EH
Source
Ann Occup Hyg 2011 Mar; 55(2):180-191
NIOSHTIC No.
20037856
Abstract
Recent recommendations for wood dust sampling include sampling according to the inhalable convention of International Organization for Standardization (ISO) 7708 (1995) Air quality-particle size fraction definitions for health-related sampling. However, a specific sampling device is not mandated, and while several samplers have laboratory performance approaching theoretical for an 'inhalable' sampler, the best choice of sampler for wood dust is not clear. A side-by-side field study was considered the most practical test of samplers as laboratory performance tests consider overall performance based on a wider range of particle sizes than are commonly encountered in the wood products industry. Seven companies in the wood products industry of the Southeast USA (MS, KY, AL, and WV) participated in this study. The products included hardwood flooring, engineered hardwood flooring, door skins, shutter blinds, kitchen cabinets, plywood, and veneer. The samplers selected were 37-mm closed-face cassette with ACCU-CAP(tm), Button, CIP10-I, GSP, and Institute of Occupational Medicine. Approximately 30 of each possible pairwise combination of samplers were collected as personal sample sets. Paired samplers of the same type were used to calculate environmental variance that was then used to determine the number of pairs of samples necessary to detect any difference at a specified level of confidence. Total valid sample number was 888 (444 valid pairs). The mass concentration of wood dust ranged from 0.02 to 195 mg m-3. Geometric mean (geometric standard deviation) and arithmetic mean (standard deviation) of wood dust were 0.98 mg m-3 (3.06) and 2.12 mg m-3 (7.74), respectively. One percent of the samples exceeded 15 mg m-3, 6% exceeded 5 mg m-3, and 48% exceeded 1 mg m-3. The number of collected pairs is generally appropriate to detect a 35% difference when outliers (negative mass loadings) are removed. Statistical evaluation of the nonsimilar sampler pair results produced a finding of no significant difference between any pairing of sampler type. A practical consideration for sampling in the USA is that the ACCU-CAP(tm) is similar to the sampler currently used by the Occupational Safety and Health Administration for purposes of demonstrating compliance with its permissible exposure limit for wood dust, which is the same as for Particles Not Otherwise Regulated, also known as inert dust or nuisance dust (Method PV2121).
Keywords
Air-quality-measurement; Analytical-processes; Dust-collection; Dust-counters; Epidemiology; Exposure-assessment; Inhalation-studies; Mathematical-models; Particulate-dust; Particulates; Particulate-sampling-methods; Quantitative-analysis; Samplers; Sampling-equipment; Sampling-methods; Standards; Statistical-analysis; Wood-dusts; Work-environment; Workplace-studies; Work-practices; Author Keywords: ACCU-CAP(tm); Button sampler; CIP10-I sampler; GSP sampler; inhalable sampling; IOM sampler; wood dust
Contact
Taekhee Lee, Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV 26505, USA
CODEN
AOHYA3
Publication Date
20110301
Document Type
Journal Article
Email Address
fwc8@cdc.gov
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0003-4878
NIOSH Division
HELD
Source Name
Annals of Occupational Hygiene
State
WV; KY; LA; AL
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