Estimation of effective radius for single-well and multiple-well SVE systems

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:69847

Bass, D H ^[1]

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1. Groundwater Technology, Inc., Norwood, MA (United States)

A design tool has been developed which provides a rough estimate of the effective cleanup radius (defined as ``the maximum distance from a vapor extraction point through which sufficient air is drawn to remove the required fraction of contamination in the desired time``) for both single-well and multiple-well soil vapor extraction (SVE) systems. This provides an understanding of the contaminant recovery rate as a function of distance from each vapor extraction well and allows SVE systems to be designed so that cleanup goals can be achieved within a specified time frame. The design tool is based on a one-dimensional model which uses analytical rather than numerical methods, and so is simpler, faster, more versatile, and more robust then more sophisticated, multi-dimensional models. The organic contaminant removal rate at a given distance from the vapor extraction point is assumed to be a function of the local rate of soil gas flow, the contaminant soil concentration, and the contaminant volatility. Soil gas flow rate as a function of distance from the vapor extraction well is estimated from pilot test data by assuming that the infiltration of atmospheric air through the soil surface is proportional to the vacuum in the soil.

• OSTI ID: 69847
• Report Number(s): CONF-941189--; ISBN 1-56590-016-2
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
DESIGN
ENVIRONMENTAL TRANSPORT
EXTRACTION APPARATUSES
ORGANIC COMPOUNDS
REMEDIAL ACTION
REMOVAL
SOILS
TECHNOLOGY ASSESSMENT