Air Sampling Media Cleanliness
Air Sampling Media Cleanliness for Vapor Intrusion
The increase in regulatory oversight at vapor intrusion sites nationwide, as well as recent publication of Federal and local vapor intrusion guidance documents and screening levels has led to a need for reliable air phase (indoor air and sub-slab/soil vapor) data at extremely low concentrations. This paper will explore and discuss the importance of media cleanliness and certification to achieve typical low level data quality objectives.
Several potential pathways of media contamination will be examined, including: canisters, flow controllers/critical orifice assemblies, vacuum gauges, and canister pressurization/fill stations in the laboratory.
Several contamination situations will be explored and quantified. The resulting data will be used to support laboratory and field sampling best practice recommendations.
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