Title: Guidance for Obtaining Representative Laboratory Analytical Subsamples from Particulate Laboratory Samples. 
Resource Type: document --> guidance / decision support 
Country: USA 
Year: 2003 
Availability: US Environmental Protection Agency (2003) Guidance for Obtaining Representative Laboratory Analytical Subsamples from Particulate Laboratory Samples. Robert W. Gerlach Lockheed Martin Environmental Services and John M. Nocerino U.S. Environmental Protection Agency. US EPA Report: EPA/600/R-03/027. http://clu-in.org/techpubs.htm 
Author 1/Producer: US Environmental Protection Agency 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Report / download web link (=direct link): http:///clu-in.org/techpubs.htm  
Format (e.g. PDF): PDF 
EUGRIS Keyword(s): Contaminated land-->Site investigation-->Sampling and analysis
Contaminated land-->Site investigation-->Sampling strategy
 
Long description: Guidance for Obtaining Representative Laboratory Analytical Subsamples from Particulate Laboratory Samples (EPA 600-R-03-027). This guidance was published by the EPA National Risk Management Research Laboratory. It provides education and instruction for managing a potential weakness in environmental data quality for solid materials. Representative data are the foundation of correct decisions and effective remedial designs. This document shows how analytical subsampling is a crucial link for representative samples. It defines sample representativeness in terms of the population of interest to the decision, which may or may not be based on a bulk average. Examples show how careless subsampling can severely bias analytical results (November 2003, 156 pages). 
Submitted By: Paul Bardos WhoDoesWhat?      Last update: 16/09/2004