Time series of trichloroethene (TCE) concentrations (mg/L) taken at 2 separate
wells. Some observations are annotated with a data qualifier of
J (estimated detected concentration).
A data frame with 30 observations on the following 5 variables.
a factor indicating the date of collection
a Date object indicating the date of collection
a factor indicating the well number
a numeric vector indicating the TCE concnetrations (mg/L)
a factor indicating the data qualifier
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.9-3.
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.