Toluene concentrations (ppb) at two background and three compliance wells
(five monthly samples at each well). Nondetects reported as
A data frame with 25 observations on the following 6 variables.
a character vector of original toluene concentrations (ppb)
a numeric vector of toluene concentrations with
<5 coded as
a logical vector indicating which observations are censored
a factor indicating the month of collection
a factor indicating the well number
a factor indicating the well type (background vs. compliance)
USEPA. (1992c). Statistical Analysis of Ground-Water Monitoring Data at RCRA Facilities: Addendum to Interim Final Guidance. Office of Solid Waste, U.S. Environmental Protection Agency, Washington, D.C. p.43.
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