Description

Sixteen quarterly measures of arsenic concentrations (ppb).

Usage

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)

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.14-18.

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.