Format
A data frame with 15 observations on the following 8 variables.
Date.Collected- a factor indicating the date of collection
Date- a Date object indicating the date of collection
Arsenic.mg.per.L- a numeric vector of arsenic concentrations (mg/L)
Arsenic.Data.Qualifier- a factor indicating the data qualifier for arsenic
Mercury.mg.per.L- a numeric vector of mercury concentrations (mg/L)
Mercury.Data.Qualifier- a factor indicating the data qualifier for mercury
Strontium.mg.per.L- a numeric vector of strontium concentrations
Strontium.Data.Qualifier- a factor indicating the data qualifier for strontium
Source
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.9-13. 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.