Evaluation of filter pack dewatering on Voc concentrations in a simulated low-yield monitoring well

A physical model was constructed to investigate the physical process of dewatering the filter-pack of a low-yield ground-water monitoring well and determine if this process effects the concentration of dissolved volatile organic compounds (VOCs). It was hypothesized that losses of VOCs would be observed as a result of an increased air-water interface and possibly turbulent flow through the filter pack during water-level recovery; Little or no measurable losses of 1,1,1-TCA, MCB, or 1,1,2,2-TET were detected during water-level recovery while simulating non-stagnant well conditions. These data imply that losses of VOCs due to volatilization resulting from the physical action of water reinfiltrating a dewatered monitoring well will be minimal; Stagnant well simulations resulted in a trend of increasing concentration with time during water-level recovery, reflecting the mixing of residual stagnant water in the filter pack and incoming fresh water. These results indicate that similar trends observed in field studies may have resulted from mixing stagnant water with incoming formation water.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Geoscience

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1993

Author dc:creator

• Icopini, Gary Allen

Contributors dc:contributor

• Steve Mizell

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/321

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1320