Log-transformed Lead Concentrations from Example 17-1 of 2009 USEPA Guidance Document

Log-transformed lead concentrations (ppb) at two background and four compliance wells (four quarterly measures at each well).

EPA.09.Ex.17.1.loglead.df

Format

A data frame with 24 observations on the following 4 variables.

Month

a factor indicating the month of collection; 1 = Jan, 2 = Apr, 3 = Jul, 4 = Oct

Well

a factor indicating the well number

Well.type

a factor indicating the well type (background vs. compliance)

LogLead

a numeric vector of log-transformed lead concentrations (ppb)

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.17-7.

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.