Title: Passive Sampling of Groundwater Wells for Determination of Water Chemistry 
Resource Type: document --> technical publication --> report 
Country: USA 
Language(s): English
Year: 2020 
Author 1/Producer: USGS 
Other Authors/Producers: Thomas E. Imbrigiotta and Philip T. Hart 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Report/Document number/description: Techniques and Methods 1-D8 
Publisher Country: USA 
Publisher web link (root): https://doi.org/10.3133/tm1D8
Report / download web link (=direct link): https://pubs.er.usgs.gov/publication/tm1D8  
Format (e.g. PDF): pdf 
EUGRIS Keyword(s): Contaminated land-->Site investigation-->Methods
Contaminated land-->Soil and groundwater processes-->Soil and groundwater processes overview
Groundwater protection-->Groundwater protection overview
Groundwater protection-->Monitoring-->Monitoring overview
Short description: This report describes the differences between purging and passive sampling methods in groundwater and explains how and why passive samplers work. The report points out the advantages and limitations of passive samplers in general and for each particular type of passive sampler. Important considerations to be taken into account prior to the use of passive samplers are discussed, such as defining the data-quality objectives, the water-quality constituents to be sampled, sample volumes required for analysis, well construction of the sampling network, and the geologic formations that will be sampled. Potential applications of passive samplers also are discussed, such as chemical-vertical profiling of wells. A general field protocol for the deployment, recovery, and sample collection using these devices is described, and some overall guidance for the practitioner with application examples is given  
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 05/05/2020

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