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