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ABSTRACT An instrumentation system consisting of driven well-points, instrumentation bundles, and discrete sampling has been developed for monitoring subsurface conditions during the operation of air injection remediation systems. The driven well points provide intimate contact reducing the impact on the remediation process. The instrumentation bundles afford continuous monitoring of subsurface conditions. The saturated zone bundle provides information on dissolved oxygen, temperature, and ground water displacement for use in defining the volume of influence of air injection systems in the saturated zone. The vadose zone bundle provides data on changes in oxygen concentrations and temperature. Both bundles allow discrete sampling for laboratory analysis. Criteria for sensor evaluation and laboratory testing protocols used for sensor evaluation are discussed. Also included are a description of the bundle housing and well-point layout at a field site.
KEYWORDS: air sparging, monitoring, remediation, in-well aeration, dissolved oxygen
This paper is from the Proceedings of the HSRC/WERC Joint Conference on the Environment, May 1996, published in hard copy and on the Web by the Great Plains/Rocky Mountain Hazardous Substance Research Center.
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