Superfund Innovative Technology Evaluation (SITE)
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Soil Gas Sampling Technology - W. L. Gore & Associates, Inc.,
GORE-SORBER Screening Survey
The GORE-SORBER module is a passive soil gas sampler that consists of several separate sorbent collection units called sorbers. Each sorber contains sorbent materials selected for there broad range of volatile organic compounds and semivolatile organic compounds and for their hydrophobic characteristics. The sorbers are sheathed in a vapor permeable insertion and retrieval cord constructed of inert, hydrophobic material that allows vapors to move freely across the membrane and onto the sorbent material and that protects the granular adsorbents from physical contact with soil particulates and water. The GORE-SORBER module was demonstrated in May and June 1997 at two sites: the Small Business Administration (SBA) site in Albert City, Iowa, and the Chemical Sales Company (CSC) site in Denver, Colorado. These sites were chosen because each has a wide range of volatile organic compound (VOC) concentrations and because each has a distinct soil type. The GORE-SORBER Screening Survey was compared to a reference method, active soil gas sampling, in terms of the following parameters:
The demonstration data indicated the following performance characteristics: