EnvStats (version 2.4.0)

EPA.09.Ex.10.1.nickel.df: Nickel Concentrations from Example 10-1 of 2009 USEPA Guidance Document

Description

Nickel concentrations (ppb) from four wells (five observations per year for each well). The Guidance Document has the label “Year” instead of “Well”; corrected in Errata.

Usage

EPA.09.Ex.10.1.nickel.df

Arguments

Format

A data frame with 20 observations on the following 3 variables.

Month

a numeric vector indicating the month the sample was taken

Well

a factor indicating the well number

Nickel.ppb

a numeric vector of nickel concentrations (ppb)