EPA.92c.toluene.df:
Toluene Concentrations from 1992 USEPA Guidance Document
Description
Toluene concentrations (ppb) at two background and three compliance wells
(five monthly samples at each well). Nondetects reported as <5< code="">.
5<>
Format
A data frame with 25 observations on the following 6 variables.
Toluene.orig
- a character vector of original toluene concentrations (ppb)
Toluene
- a numeric vector of toluene concentrations with
<5< code=""> coded as 5
5<>
Censored
- a logical vector indicating which observations are censored
Month
- a factor indicating the month of collection
Well
- a factor indicating the well number
Well.type
- a factor indicating the well type (background vs. compliance)
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.43.