Mercury Concentrations from Example 19-5 of 2009 USEPA Guidance Document
Mercury concentrations (ppb) at four background and two compliance wells.
EPA.09.Ex.19.5.mercury.df
A data frame with 36 observations on the following 6 variables.
Eventa factor indicating the time of collection
Wella factor indicating the well number
Well.typea factor indicating the well type (background vs. compliance)
Mercury.ppb.origa character vector of original mercury concentrations (ppb)
Mercury.ppba numeric vector of mercury concentrations (ppb) with nondetects set to their detection limit
Censoreda 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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