EPA.92c.benzene1.df:
Benzene Concentrations from 1992 USEPA Guidance Document
Description
Benzene concentrations (ppb) at six background wells
(six monthly samples for each well). Nondetects reported as <2< code="">.
2<>Format
A data frame with 36 observations on the following 5 variables.
Benzene.orig- a character vector of original benzene concentrations (ppb)
Benzene- a numeric vector of benzene concentrations with
<2< code=""> coded as 22<> Censored- a logical vector indicating which observations are censored
Month- a factor indicating the month of collection
Well- a factor indicating the well number
Source
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.36.