Toluene concentrations (ppb) at two background and three compliance wells
(five monthly samples at each well). Nondetects reported as <5
.
EPA.92c.toluene.df
A data frame with 25 observations on the following 6 variables.
Toluene.orig
a character vector of original toluene concentrations (ppb)
Toluene
a numeric vector of toluene concentrations with <5
coded as 5
Censored
a logical vector indicating which observations are censored
Month
a factor indicating the month of collection
Well
a factor indicating the well number
Well.type
a factor indicating the well type (background vs. compliance)