Register for:
 
Advantages of Passive Sampling as a Decision-Making Tool
 
Tuesday, June 22, 2021
This 1 hour webinar starts at:
10:30 am (PT) | 12:30 pm (CT) | 1:30 pm (ET)
 

Passive sampling devices (PSDs) present many advantages over conventional sampling methods for quantifying the availability of hydrophobic organic compounds (HOC) and inorganic compounds in sediment, soil, surface water and storm water in terms of cost and data quality. PSDs provide data to estimate contaminant bioavailability and toxicity to environmental receptors that are more accurate than conventional grab or mechanically extracted samples, as PSDs quantify freely dissolved contaminant concentrations (Cfree) as opposed to total mass including sorbed fractions. Measuring only bioavailable contaminants with PSDs provides a better measure of actual toxicity and mobility for environmental receptors and decreases toxicity overestimation compared to  conventional sampling methods (e.g., core collection, porewater extraction). 

PSDs have been used in the laboratory and the field for decision making in site investigation and remediation, including techniques and advancements that simplify and improve ease of sampling, increase data quality and lower costs. PSDs can be deployed directly in-situ to capture the influence of groundwater flux, changes in field conditions and the heterogeneity of a site on the freely dissolved concentrations of the compounds of interest or ex situ where sample is exposed to a PSD in the laboratory to test remedies and/or speed up sampling kinetics. 

Recent case studies where passive samplers have been used to determine the extent of contamination and/or effectiveness of the remedy, ultimately leading to a “no further action” decision. Finally, recent developments on the “bleeding edge” of passive sampling will be discussed. 

Brent G. Pautler, Ph.D. |  SiREM Chemistry Services Manager 
Michael Healey, B.Sc. | SiREM Treatability and SP3™ Services Supervisor
Davis Wiles | Eurofins Knoxville Technical Director