EnvStats (version 2.4.0)

EPA.09.Ex.14.4.arsenic.df: Arsenic Concentrations from Example 14-4 of 2009 USEPA Guidance Document

Description

Sixteen quarterly measures of arsenic concentrations (ppb).

Usage

EPA.09.Ex.14.4.arsenic.df

Arguments

Format

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

Sample.Date

a factor indicating the month and year of collection

Month

a factor indicating the month of collection

Year

a factor indicating the year of collection

Arsenic.ppb

a numeric vector of arsenic concentrations (ppb)