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Trichloroethylene (TCE) concentrations (mg/L) at 10 groundwater monitoring wells before and after remediation.
data(ACE.13.TCE.df)
A data frame with 20 observations on the following 3 variables.
TCE.mg.per.L
TCE concentrations
Well
a factor indicating the well number
Period
a factor indicating the period (before vs. after remediation)