EnvStats (version 2.4.0)

EPA.09.Ex.20.1.nickel.df: Nickel Concentrations from Example 20-1 of 2009 USEPA Guidance Document

Description

Nickel concentrations (ppb) at a single well. Eight monthly measures during the background period and eight monthly measures during the compliance period.

Usage

EPA.09.Ex.20.1.nickel.df

Arguments

Format

A data frame with 16 observations on the following 4 variables.

Month

a factor indicating the month of collection

Year

a factor indicating the year of collection

Period

a factor indicating the period (baseline vs. compliance)

Nickel.ppb

a numeric vector of nickel concentrations (ppb)