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Data Series 762

Prepared in cooperation with U.S. Environmental Protection Agency
Region 4 Superfund Section

Geophysical Logging and Geologic Mapping Data in the Vicinity of the GMH Electronics Superfund Site near Roxboro, North Carolina

By Melinda J. Chapman, Timothy W. Clark, and John H. Williams

DS 762 Report (6.31 MB)


Geologic mapping, the collection of borehole geophysical logs and images, and passive diffusion bag sampling were conducted by the U.S. Geological Survey North Carolina Water Science Center in the vicinity of the GMH Electronics Superfund site near Roxboro, North Carolina, during March through October 2011. The study purpose was to assist the U.S. Environmental Protection Agency in the development of a conceptual groundwater model for the assessment of current contaminant distribution and future migration of contaminants. Data compilation efforts included geologic mapping of more than 250 features, including rock type and secondary joints, delineation of more than 1,300 subsurface features (primarily fracture orientations) in 15 open borehole wells, and the collection of passive diffusion-bag samples from 42 fracture zones at various depths in the 15 wells.

Revised July 15, 2013

First posted June 26, 2013

For additional information contact:
Director, North Carolina Water Science Center
U.S. Geological Survey
3916 Sunset Ridge Road
Raleigh, NC 27607

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Chapman, M.J., Clark, T.W., and Williams, J.H., 2013, Geophysical logging and geologic mapping data in the vicinity of the GMH Electronics Superfund site near Roxboro, North Carolina: U.S. Geological Survey Data Series 762, 35 p., at




Methods of Data Collection

Geologic Mapping Data

Borehole Geophysical Logging and Imaging Data

Passive Diffusion-Bag Sampling Results

Hydrogeologic and Water-Quality Sections

References Cited


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