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Borehole geophysical logs at Naval Weapons Industrial Reserve Plant, Dallas, Texas

Open-File Report 2000-76

In cooperation with the Southern Division Naval Facilities Engineering Command
By:
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Abstract

A shallow alluvial aquifer at the Naval Weapons Industrial Reserve Plant near Dallas, Texas, has been contaminated by organic solvents used in the fabrication and assembly of aircraft and aircraft parts. Natural gamma-ray and electromagnetic-induction borehole geophysical logs were obtained from 162 poly vinyl-chloride-cased wells at the plant and were integrated with existing lithologic data to improve site characterization of the subsurface alluvium. Software was developed for filtering and classifying the log data and for processing, analyzing, and creating graphical output of the digital data. The alluvium consists of mostly fine-grained low-permeability sediments; however for this study, the alluvium was classified into low, intermediate, and high clay-content sediments on the basis of the gamma-ray logs. The low clay-content sediments were interpreted as being relatively permeable, whereas the high clay-content sediments were interpreted as being relatively impermeable. Simple statistics were used to identify zones of potentially contaminated sediments on the basis of the gamma-ray log classifications and the electromagnetic-induction log conductivity data.

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Borehole geophysical logs at Naval Weapons Industrial Reserve Plant, Dallas, Texas
Series title:
Open-File Report
Series number:
2000-76
Year Published:
2000
Language:
English
Publisher:
U.S. Geological Survey
Description:
Report: iii, 232 p.; Plate: 22 x 28 inches
Country:
United States
State:
Texas
City:
Dallas
Other Geospatial:
Naval Weapons Industrial Reserve Plant