Measurement of two-fluid saturations in a fine to medium sand

Gravelle, C F; Knight, M A; Mitchell, Robert J.

doi:10.1139/t96-127

Cited by 6 publications

(1 citation statement)

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“…Chang et al [ 1 ] directly measured gasoline concentrations after a centrifuge test by collecting soil samples for gas chromatograph analysis. Gravelle et al [ 17 ] and Knight and Mitchell [ 7 ] described the influence of two different constant rates of release on the penetration of the LNAPLs into an unsaturated granular medium. They modeled the release of 1,000 L of silicon oil into unsaturated fine sand.…”

Section: Size and Shape Of Contamination Plumementioning

confidence: 99%

A Review of Centrifugal Testing of Gasoline Contamination and Remediation

Meegoda

2011

IJERPH

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Leaking underground storage tanks (USTs) containing gasoline represent a significant public health hazard. Virtually undetectable to the UST owner, gasoline leaks can contaminate groundwater supplies. In order to develop remediation plans one must know the extent of gasoline contamination. Centrifugal simulations showed that in silty and sandy soils gasoline moved due to the physical process of advection and was retained as a pool of free products above the water table. However, in clayey soils there was a limited leak with lateral spreading and without pooling of free products above the water table. Amount leaked depends on both the type of soil underneath the USTs and the amount of corrosion. The soil vapor extraction (SVE) technology seems to be an effective method to remove contaminants from above the water table in contaminated sites. In-situ air sparging (IAS) is a groundwater remediation technology for contamination below the water table, which involves the injection of air under pressure into a well installed into the saturated zone. However, current state of the art is not adequate to develop a design guide for site implementation. New information is being currently generated by both centrifugal tests as well as theoretical models to develop a design guide for IAS. The petroleum contaminated soils excavated from leaking UST sites can be used for construction of highway pavements, specifically as sub-base material or blended and used as hot or cold mix asphalt concrete. Cost analysis shows that 5% petroleum contaminated soils is included in hot or cold mix asphalt concrete can save US$5.00 production cost per ton of asphalt produced.

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Section: Size and Shape Of Contamination Plumementioning

confidence: 99%