Measuring Compound Concentrations Using the AGI Universal Sampler, a Time-Integrated, Passive Gas and Liquid Sampler

TL;DRAbstract

Soil gas sampling has been used for decades in environmental site assessment and monitoring programs, with the results used to focus subsequent, more invasive and expensive sampling and remediation (i.e., soil and groundwater), evaluate the performance of a remediation system, or identify new contaminant releases. More recently, soil gas sampling has become the standard approach in evaluating the potential for the intrusion of gas-phase volatile and semi-volatile compounds into confined structures and spaces in concentrations high enough to pose a human health risk to the occupants therein. Conventional soil gas sampling utilizes active or passive methods. Active methods force an extraction of soil gas from the subsurface environment at a point in time or over a relatively short time period. Passive methods rely on natural, concentration-gradient-driven diffusion of compounds in the gas-phase through the soil pore space to the sampler for continuous collection. Passive methods are gene

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