Statistical analysis of asbestos fibre counts

Oehlert, Gary W.; Lee, Richard J.; Orden, Drew Van

doi:10.1002/env.3170060203

Cited by 24 publications

(17 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since all but one of the samples reported values lower than the limits of detection, it was necessary to assume some Wnite number Table 1 Engine disassembly tasks * Asbestos-containing gasket (see Table 2). (a) that sample concentrations were at the limit of detection for each sample, (b) that sample concentrations were one-half of the detection limit for each sample (Oehlert et al, 1995).…”

Section: Time Weighted Average Exposuresmentioning

confidence: 99%

Asbestos exposure from gaskets during disassembly of a medium duty diesel engine

Liukonen¹,

Weir²

2005

Regulatory Toxicology and Pharmacology

View full text Add to dashboard Cite

Section: Time Weighted Average Exposuresmentioning

confidence: 99%

Asbestos exposure from gaskets during disassembly of a medium duty diesel engine

Liukonen¹,

Weir²

2005

Regulatory Toxicology and Pharmacology

View full text Add to dashboard Cite

“…Some investigators [50,86] have suggested that one half of the detection limit value should be used for statistical calculations. Use of the detection limit value provides the highest numerical exposure and may be more applicable for some studies as a method of incorporating a safety factor and in determining exposure and hazard assessment criteria.…”

Section: Discussionmentioning

confidence: 99%

A Study of Area and Personal Airborne Asbestos Samples during Abatement in a Crawl Space

Lange

Kuhn

Thomulka

et al. 2000

Indoor Built Environ

View full text Add to dashboard Cite

Air sample data were collected during asbestos abatement of two buildings using area and personal sampling methods. Abatement involved removal of pipe insulation from crawl spaces. The two sampling methods were compared to determine if there was a relationship between them. A relationship was observed between area and personal airborne samples in building 2 as determined by correlation and regression but is most likely due to chance. One major outlier was detected for both area and personal measurement sample data sets in building 2. It was concluded that any relationship between area and personal sample measurements must be viewed with caution. Concentrations measured from personal sampling were statistically higher than those from area sampling. Also, the distributions of concentrations in the samples were calculated to be nonnormal (logarithmic form). It is proposed that area sampling under-estimates worker exposure compared to personal measurements and is not applicable for exposure and hazard assessment. It is suggested that area and personal samples measure two different population concentrations of airborne fibers. Use of area samples in lieu of personal measurements should only be employed with caution.

show abstract

“…Some investigators [81,82] have suggested that one half of the detection limit value should be used for statistical calculations. Others have suggested using values at the numerical number reported [73,83].…”

Section: Methodsmentioning

confidence: 99%

A Statistical Evaluation of Asbestos Air Concentrations

Lange¹

1999

Indoor Built Environ

View full text Add to dashboard Cite

Both area and personal air samples collected during an asbestos abatement project were matched and statistically analysed. Among the many parameters studied were fibre concentrations and their variability. Mean values for area and personal samples were 0.005 and 0.024 f·cm^–3 of air, respectively. Summary values for area and personal samples suggest that exposures are low with no single exposure value exceeding the current OSHA TWA value of 0.1 f·cm^–3 of air. Within- and between-worker analysis suggests that these data are homogeneous. Comparison of within- and between-worker values suggests that the exposure source and variability for abatement are more related to the process than individual practices. This supports the importance of control measures for abatement. Study results also suggest that area and personal samples are not statistically related, that is, there is no association observed for these two sampling methods when data are analysed by correlation or regression analysis. Personal samples were statistically higher in concentration than area samples. Area sampling cannot be used as a surrogate exposure index for asbestos abatement workers.

show abstract

Statistical analysis of asbestos fibre counts

Cited by 24 publications

References 3 publications

Asbestos exposure from gaskets during disassembly of a medium duty diesel engine

Asbestos exposure from gaskets during disassembly of a medium duty diesel engine

A Study of Area and Personal Airborne Asbestos Samples during Abatement in a Crawl Space

A Statistical Evaluation of Asbestos Air Concentrations

Contact Info

Product

Resources

About