ITRC defines passive sampling as using a device that acquires a sample from a discrete location without inducing active media transport. The passive technologies considered in this guidance rely on exposure of the sampling device to media in ambient equilibrium during the deployment period. The guidance classifies them into three types of technology based on the sampler mechanism and nature of the collected sample. Depending on the type of sampler, it may capture a single snapshot, measure conditions after reaching equilibrium, or accumulate contaminants throughout the deployment period. This approach can provide reliable data while minimizing disruption to the site.
The Passive Sampling Technology Update (PSU-1, 2024) guidance combines ITRC’s previous passive sampling guidance documents (DSP-1, DSP-3, DSP-4, and DSP-5) into one comprehensive resource that also includes updates to current technologies. It evaluates 24 passive sampling technologies and explains their uses during all phases of environmental site investigation, remediation, and long-term monitoring. The document assists regulators, consultants, and other stakeholders choose the most appropriate sampling technology based on the environmental media and contaminants of concern, with detailed technology descriptions, analyte selection tables, instructional videos, and real-world case studies to support confident decision-making.
Topic(s): Passive Sampling, Remediation Technologies
