EPA.09.Ex.20.1.nickel.df {EnvStats}

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

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)

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.20-4.

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.