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Field Monitoring and Performance Evaluation of an in Situ Air Sparging System at a Gasoline-contaminated Site by Barbara L. Hall; Thomas E. Lachmar; R.Ryan Dupont is a Environmental Science article available to read on EtoBox.

What is Field Monitoring and Performance Evaluation of an in Situ Air Sparging System at a Gasoline-contaminated Site about?

In situ air sparging (IAS) has been used since the mid-1980s, but few carefully designed field studies have been performed to evaluate its effectiveness. In this study, 27 discrete monitoring points (MPs) were installed at a gasoline-contaminated site to investigate the efficacy of IAS. Each MP was instrumented with a pressure transducer and a Technalithics dissolved oxygen (DO) probe, and located so they could be used to characterize subsurface changes in total head and DO with depth, distance and orientation around a central injection well. Because the blower over-heated and automatically shut down after approximately 30 min and short-circuiting of air into two MPs occurred within 2 min, the study was designed as three sets of three 30-min trials. Longer trials would not have yielded different nor more insightful results. A volume of soil was not oxygenated during any injection. Instead, air traveled directly to at least four of seven different MPs during eight of the nine trials, probably as a result of an air bubble forming beneath a confining layer. The order of air arrival at the MPs varied during the first few trials, but once a preferential pathway was established, it did n

Who reads Field Monitoring and Performance Evaluation of an in Situ Air Sparging System at a Gasoline-contaminated Site?

Author

Barbara L. Hall; Thomas E. Lachmar; R.Ryan Dupont

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-3894)

Published

2000

Language

EN

Field

Environmental Science (Physical Sciences)