Design, performance, and analysis of a multi-level air permeability test

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dc.contributor.authorHaney, Orrick Rowlanden
dc.contributor.committeechairWiddowson, Mark A.en
dc.contributor.committeememberFilz, George M.en
dc.contributor.committeememberDiplas, Panayiotisen
dc.contributor.departmentCivil Engineeringen
dc.date.accessioned2014-03-14T21:27:24Zen
dc.date.adate2009-01-17en
dc.date.available2014-03-14T21:27:24Zen
dc.date.issued1994-02-05en
dc.date.rdate2009-01-17en
dc.date.sdate2009-01-17en
dc.description.abstractThe design, performance, and analysis of a soil vapor extraction system to identify zones most conductive to air transport and quantify kair in sequential soil layers is presented. A multi-level extraction well, with alternating solid and screened sections, was utilized to characterize multi-layered media. The field site, located in the Carolina Slate Belt within the physiographic region known as the Piedmont, is comprised of alternating layers of different soil types of varying kair, including thin bands of clay, silt, and sand. The pneumatic test consisted of one multi-level extraction well and four multi-level pressure monitoring wells. Screen locations were based on previous site characterization. Vapors were extracted at one screen while pressure, temperature, and volumetric flow rate were monitored using a computer data acquisition system. Data was analyzed by both steady-state and transient solution techniques using pressure drawdown versus time data collected at various locations. Results from vapor extraction tests indicate that the multi-level approach is advantageous when dealing with heterogenous media, since the most permeable layer was identified. Transient and steady-state solutions indicate that a k<sub>air</sub>= 2.0 X 10⁻⁷ cm² is representative of the located permeable layer within the subsurface. Vacuum system, formation, and extraction well characteristics are evaluated to determine pressure as a function of volumetric flow rate.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 227 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-01172009-063603en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01172009-063603/en
dc.identifier.urihttp://hdl.handle.net/10919/40664en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.H365.pdfen
dc.relation.isformatofOCLC# 30505998en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.H365en
dc.subject.lcshSoil permeabilityen
dc.titleDesign, performance, and analysis of a multi-level air permeability testen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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