Arsenic concentrations (μg/L) at a single well, consisting of: 8 historical observations, 4 future observations for Case 1, and 4 future observations for Case 2.
A data frame with 16 observations on the following 2 variables.
a factor with levels
a numeric vector of arsenic concentrations (μg/L)
USEPA. (2009). Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities, Unified Guidance. EPA 530/R-09-007, March 2009. Office of Resource Conservation and Recovery Program Implementation and Information Division. U.S. Environmental Protection Agency, Washington, D.C. p.7-26.
USEPA. (2010). Errata Sheet - March 2009 Unified Guidance. EPA 530/R-09-007a, August 9, 2010. Office of Resource Conservation and Recovery, Program Information and Implementation Division. U.S. Environmental Protection Agency, Washington, D.C.