Mercury concentrations (ppb) at four background and two compliance wells.
A data frame with 36 observations on the following 6 variables.
a factor indicating the time of collection
a factor indicating the well number
a factor indicating the well type (background vs. compliance)
a character vector of original mercury concentrations (ppb)
a numeric vector of mercury concentrations (ppb) with nondetects set to their detection limit
a logical vector indicating which observations are censored
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.19-33.
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.
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