TCE concentrations (ug/L) in ground waters of Long Island, New York. Categorized by two of the three land use types (medium and high density residential) surrounding the wells and measured in the study.
Objective -- determine if TCE concentrations differ in ground water under two land use types. There are four detection limits, at 1,2,4 and 5 ug/L.
data(TCE2)An object of class data.frame with 222 rows and 6 columns.
Eckhardt et al., 1989, USGS Water Resources Investigations Report 86-4142.
The full dataset with three land use types is used in Chapter 10 of Statistics for Censored Environmental Data using Minitab and R, by D.R.Helsel; Wiley (2012).