beTWA: TWA Beryllium Exposure Data
In STAND: Statistical Analysis of Non-Detects

Description Usage Format Details References Examples

As part of a chronic disease prevention program the DOE adopted an 8-hour time-weighted average (TWA) occupational exposure limit (OEL) value of 0.2 μ g/m^3 proposed by the American Conference of Government Industrial Hygienists (DOE 10 CRF Part 850 and ACGIH 2004).

1	data(beTWA)

A data frame with 280 observations on the following 2 variables:

twa: 8-hour TWA Beryllium exposure μ g/m^3
det: 0 if non-detect; 1 if detect

The beTWA data set is the results of 280 personal 8-hour TWA beryllium exposure readings at a DOE facility. This data contains 175 non-detects that range in value from 0.005 to 0.1 μ g/m^3. A detailed description and analysis of this data is given as Example 2 in Section 4 of Frome and Wambach (2005).

Frome, E. L. and Wambach, P. F. (2005), "Statistical Methods and Software for the Analysis of Occupational Exposure Data with Non-Detectable Values," ORNL/TM-2005/52,Oak Ridge National Laboratory, Oak Ridge , TN 37830 Available at: http://www.csm.ornl.gov/esh/aoed/ORNLTM2005-52.pdf

data(beTWA)
##  calculate all of the summary statistics described in
##  Example 2 in Section 4 of Frome and Wambach (2005)
round( IH.summary(beTWA,L=0.2), 3)