Use of Magnetics For the Location of Environmental Contamination

Timothy D. J. Pippett; Paul O’Donnell; Stuart I. Hankin; Craig A. Blundell

doi:10.1071/EG995206

ISSN: 0812-3985
E-ISSN: 1834-7533

Use of Magnetics For the Location of Environmental Contamination
Authors Timothy D. J. Pippett^a, Paul O’Donnell^a, Stuart I. Hankin^a and Craig A. Blundell^b
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^a ADI ServicesSub Surface Imaging, Ground Floor, 77 Parramatta Road Silverwater, NSW, 2141 ^b EPA, N.S.W. Citadel Towers (Block B) 799 Pacific Highway Chatswood, N.S.W., 2067
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 26, Issue 2-3, Jun 1995, p. 206 - 208
DOI: https://doi.org/10.1071/EG995206
- Published online: 01 Jun 1995

Abstract

ADI Services, in conjunction with the Geophysical Research Institute of the University of New England, have been utilising the TM-4 Imaging Alkali-Vapour Magnetometer to locate and validate the presence of buried ferrous items in contaminated areas. Unlike many conventional systems, the TM-4 enables the rapid collection of high resolution magnetic data. The data can be displayed as colour images and interpreted semi-automatically and/or manually. Flexibility within the TM-4 system enables irregular blocks to be surveyed without requiring the user to know the exact beginning and end coordinates of the survey lines.

Two case studies are presented which demonstrate the effectiveness of high resolution magnetic surveys for contam-nated site assessment. The first case study shows how the TM-4 system has been used for the detection of unexploded ordnance, associated ammunition components and fragmentation. The objective for the second case study was to locate one edge of a former waste burial pit which was known to contain significant quantities of ferrous waste. The contrast in the total magnetic field between the burial pit and the surrounding bedrock was easily recognised.

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References

Cohen, K. K., Moebs, N. N., and Trevits, M. A., 1992, IVIagnetometry as a tool to map subsurface conditions in an abandoned iron ore mining district in New Jersey: Proc, Symp. Application of Geophysics to Engineering and Environmental Problems, Vol. 1 SAGEEP’92, 91-110.
Emerson, D. W., Ried, J. E., Clark, D. A., Hallett, M. S. C, and Manning, P. B. 1992, The geophysical responses of buried drums - field tests in weathered Hawkesbury Sandstone, Sydney Basin, NSW: Explor. Geophys., 23, 589-617.
Gillekson, R. H., Gorin, S. R., and Laymon, D. E. 1992, Application to magnetic and electromagnetic methods to metal detection, Proc, Symp. Application of Geophysics to Engineering and Environmental Problems, Vol. 1 SAGEEP’92 309-328.
Stanley, J. M. 1991, 100% QAin Explosive Ordnance Disposal, Geophysical Research Institute, University of New England.
Stanley, J. M., Cattach, M. K. and Lee, S. J. 1991, ‘Magnetometer Systems for Explosive Ordnance Detection on Land: Geophysical Technology Pty Ltd, University of New England.
Stanley, J. M., Cattach, M. K., and Lee, S. J. (1992); TM-4 The Image Processing Magnetometer System: Field Operation Manual: Geophysical Technology Pty Ltd, University of New England.

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Article Type: Research Article

Keyword(s): buried waste; environmental contamination; high resolution; magnetics

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Use of Magnetics For the Location of Environmental Contamination

Abstract

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