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Posts Tagged ‘ITRC’

Vapor Intrusion Investigations: Air Sampling Tips for Meeting Data Quality Objectives

Monday, September 26th, 2011

N. Dagnillo1, L. Hill2, A. Fortune3, A. Smith4, and S. Thompson2
1Trihydro Corporation, 3001 E. Pershing Blvd, Suite 115, Cheyenne, WY 82007
2Trihydro Corporation, 1537 Riverside Ave., Suite 101, Fort Collins, CO 80524
3Columbia Analytical Services, Inc., 2655 Park Center Drive, Suite A, Simi Valley, CA 93065
4Trihydro Corporation, 9460 Calle Milano, Atascadero, CA 93422

Vapor intrusion is a fate and transport process characterized by the upward movement of volatile chemicals from subsurface contamination (e.g., buried waste, contaminated groundwater) into overlying buildings. The potential for adverse human health effects from exposure to indoor air vapors has motivated private, state, and federal entities to develop guidance documents and protocols specific to the collection and analysis of soil vapor data.

Read more about Vapor Intrusion Investigations…

Passive Diffusion Devices & Polyethylene Diffusion Bag (PDB) Samplers

Sunday, October 26th, 2003

Passive Diffusion SamplingPassive Diffusion Samplers are generating a lot of interest in the environmental community for four main reasons:

•Water samples are more representative of the area adjacent to the well screen or area of interest than those taken by other conventional means.
•Well purging is not required.
•They are simple to deploy.
•They are inexpensive when compared to other sampling techniques.

The principle behind passive diffusion is that compounds will migrate or diffuse through a semi-permeable membrane until a concentration equilibrium is established on either side of the membrane. The following three passive devices are currently commercially available or will be soon.

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