EPA.09.Ex.21.6.nitrate.df {EnvStats}

Nitrate Concentrations from Example 21-6 of 2009 USEPA Guidance Document

Description

Nitrate concentrations (mg/L) at a well used for drinking water.

Usage

EPA.09.Ex.21.6.nitrate.df

Format

A data frame with 12 observations on the following 5 variables.

Sampling.Date

a character vector indicating the sampling date

Date

a Date object indicating the sampling date

Nitrate.mg.per.l.orig

a character vector of original nitrate concentrations (mg/L)

Nitrate.mg.per.l

a numeric vector of nitrate concentrations (mg/L) with nondetects set to their detection limit

Censored

a logical vector indicating which observations are censored

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.21-22.

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.