Benzene concentrations (ppb) collected at a landfill that previously handled smelter waste and is now undergoing remediation efforts.
A data frame with 8 observations on the following 4 variables.
a numeric vector indicating the month of collection
a character vector of original benzene concentrations (ppb)
a numeric vector of benzene 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.21-7.
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.