EPA.92c.copper1.df:
Copper Concentrations from 1992 USEPA Guidance Document
Description
Copper concentrations (ppb) at two background and one compliance wells (six monthly samples for each well).
Format
A data frame with 18 observations on the following 4 variables.
Copper- a numeric vector of copper concentrations (ppb)
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.47.