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ITRC position paper for passive diffusion sampling, 2002


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This document is intended to facilitate the use of polyethylene diffusion bag (PDB) samplers for long-term monitoring (LTM). The guidelines presented in Sections 2 and 3 relate to appropriate implementation, data interpretation, and regulatory issues of concern.

Although diffusion samplers can be useful for many different activities and have membranes composed of various materials, this discussion primarily concerns the use of low density polyethylene LDPE) bags filled with deionized water and used in LTM for specific volatile organic compounds (VOCs).

The technical basis for use of PDB samplers is presented in the U.S. Geological Survey (USGS) Water Resources Investigations Report 01-4060, “User’s Guide for Polyethylene-Based Passive Diffusion Bag Samplers to Obtain Volatile Organic Compound Concentrations in Wells” (Vroblesky 2001a; 2001b). This document should be used in conjunction with the technical guidance in the PDB User’s Guide.

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