Aldicarb concentrations (ppm) at three compliance wells (four monthly samples at each well).
A data frame with 12 observations on the following 3 variables.
Aldicarb concentrations (ppm)
a factor indicating the month of collection
a factor indicating the well number
USEPA. (1989b). Statistical Analysis of Ground-Water Monitoring Data at RCRA Facilities, Interim Final Guidance. EPA/530-SW-89-026. Office of Solid Waste, U.S. Environmental Protection Agency, Washington, D.C. p.6-13.