Dissolved iron (Fe) concentrations (ppm) at six upgradient wells (four quarterly measures at each well).
EPA.09.Ex.13.1.iron.df
A data frame with 24 observations on the following 4 variables.
Month
a numeric vector indicating the month the sample was taken
Year
a numeric vector indicating the year the sample was taken
Well
a factor indicating the well number
Iron.ppm
a numeric vector if iron concentrations (ppm)