EPA.09.Ex.6.3.sulfate.df {EnvStats}

Sulfate Concentrations from Example 6-3 of 2009 USEPA Guidance Document

Description

Sulfate concentrations (ppm) at two background wells (five quarterly measures at each well).

Usage

EPA.09.Ex.6.3.sulfate.df

Format

A data frame with 10 observations on the following 4 variables.

Month

a numeric vector indicating the month the observations was taken

Year

a numeric vector indicating the year the observation was taken

Well

a factor indicating the well number

Sulfate.ppm

a numeric vector of sulfate concentrations (ppm)

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.6-20.

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.