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dc.creatorFryar, Dennis Gene
dc.date.accessioned2012-06-07T22:48:42Z
dc.date.available2012-06-07T22:48:42Z
dc.date.created1997
dc.date.issued1997
dc.identifier.urihttps://hdl.handle.net/1969.1/ETD-TAMU-1997-THESIS-F79
dc.descriptionDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.en
dc.descriptionIncludes bibliographical references.en
dc.descriptionIssued also on microfiche from Lange Micrographics.en
dc.description.abstractChevron Bulk Terminal No. 61324760, located within the Rio Grande Inner Valley in southwest Albuquerque, New Mexico, is underlain by a shallow perched aquifer which has been contaminated with petroleum hydrocarbons. The primary objective of this study was to model groundwater flow in the shallow aquifer in order to determine if the site was affected by multiple contaminant plumes, and if so, the possible source of each plume. Groundwater flow within the shallow aquifer was simulated using a two-dimensional areal model which included the Chevron terminal and the surrounding area. Three steady-state simulations assuming different flow conditions were conducted. Flow path analyses and velocity vector plots were then used to determine potential migration paths of contaminants released in the vicinity of the Chevron property. Transient flow modeling tests, designed to investigate the effects of seasonal recharge from a nearby irrigation ditch, the San Jose Lateral, were conducted with various recharge rates for the ditch. In all of the simulations, a deeper channel in the base of the aquifer directly east of the Chevron property created a converging flow pattern which prevented flow between the northern and southern sections of the property. Additionally, a north/south trending groundwater divide which passes beneath the western edge of the Chevron property produced a flow pattern which prevented movement of contaminants from the east or west toward the Chevron property. This suggests that contamination beneath the northern part of the Chevron property must have originated from on-site releases or from releases north of the property. Likewise, contamination beneath the southern part of the Chevron property must have originated from on-site releases or from releases south of the property. A statistical analysis of groundwater chemical data using cluster analysis was conducted in an attempt to verify the existence of multiple contaminant plumes as suggested by the flow model results. The existence of more than one contaminant plume was supported by cluster analysis results which revealed two identifiable groups of wells in the vicinity of the Chevron property.en
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M University
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en
dc.subjectgeology.en
dc.subjectMajor geology.en
dc.titleHydrogeologic investigation of petrochemical contamination at a bulk storage facilityen
dc.typeThesisen
thesis.degree.disciplinegeologyen
thesis.degree.nameM.S.en
thesis.degree.levelMastersen
dc.type.genrethesisen
dc.type.materialtexten
dc.format.digitalOriginreformatted digitalen


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