External Quality-Assurance Results for the National Atmospheric Deposition Program/ National Trends Network and Mercury Deposition Network, 2004

by Gregory A. Wetherbee

Overview

The U.S. Geological Survey (USGS) used five programs to provide external quality-assurance monitoring for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) and two programs to provide external quality-assurance monitoring for the NADP/Mercury Deposition Network (NADP/MDN) during 2004. An intersite-comparison program was used to estimate accuracy and precision of field-measured pH and specific-conductance. The variability and bias of NADP/NTN data attributed to field exposure, sample handling and shipping, and laboratory chemical analysis were estimated using the sample-handling evaluation (SHE), field-audit, and interlaboratory-comparison programs. Overall variability of NADP/NTN data was estimated using a collocated-sampler program. Variability and bias of NADP/MDN data attributed to field exposure, sample handling and shipping, and laboratory chemical analysis were estimated using a system-blank program and an interlaboratory-comparison program.

Product Details

BN ID:	2940014367622
Publisher:	The Delano Max Wealth Institute, LLC.
Publication date:	05/18/2012
Sold by:	Barnes & Noble
Format:	eBook
File size:	8 MB