Magnetic survey technique for determining subsurface environmental contamination
First Claim
1. A method of determining the extent of underground contamination within a test area, the method comprising:
- generating base data related to underground;
selecting a plurality of test sites spaced throughout a ground surface of the test area;
recording a magnetic measurement at each of the plurality of test sites to generate magnetic test data;
grouping the magnetic test data within one of a plurality of selected data ranges each having a variation of less than about 25 gammas;
displaying the grouped magnetic test data as a function of the test area; and
comparing the displayed test data with the base data to determine the extent of underground contamination within the test area.
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Accused Products
Abstract
A technique for determining the extent of underground contamination within a test area involves recording of magnetic measurements at each of a plurality of test sites to generate magnetic test data. The generated magnetic test data is grouped within one of a plurality of selected data ranges, and the grouped data is displayed as a function of the test area. The displayed test data may be compared with base data related to underground contamination to determine the extent of contamination within the test area. Generated data is grouped within the plurality of data ranges each having variation of less than 25 gammas, and multiple groupings of data may be displayed with similarly colored data within one of a plurality of levels. The displayed test data may be compared with the contamination level from one or more contamination locations within the test area, and contamination locations overlayed on a map of the test area with the grouped magnetic test data.
31 Citations
19 Claims
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1. A method of determining the extent of underground contamination within a test area, the method comprising:
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generating base data related to underground; selecting a plurality of test sites spaced throughout a ground surface of the test area; recording a magnetic measurement at each of the plurality of test sites to generate magnetic test data; grouping the magnetic test data within one of a plurality of selected data ranges each having a variation of less than about 25 gammas; displaying the grouped magnetic test data as a function of the test area; and comparing the displayed test data with the base data to determine the extent of underground contamination within the test area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining the extent of underground contamination within a test area including one or more contamination locations each having a contamination level, the method comprising:
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selecting a plurality of test sites spaced throughout a ground surface of the test area; recording a magnetic measurement at each of the plurality of test sites to generate magnetic test data; grouping the magnetic test data within one of a plurality of selected data ranges each having a variation of less than about 25 gammas; displaying the grouped test data as a function of the test area; and comparing the displayed test data with the contamination level from the one or more contamination locations to determine the extent of underground contamination within the test area. - View Dependent Claims (11, 12, 13, 14)
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15. A method of determining the extent of underground contamination within a test area, the method comprising:
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generating base data relating to migration of underground fluids; selecting a plurality of test sites defining a grid-shaped pattern spaced throughout a ground surface of the test area; positioning a magnetometer over each of the plurality of test sites to generate magnetic test data; grouping the magnetic test data within one of a plurality of selected data ranges each having a variation of less than 25 gammas; displaying the grouped test data as a function of the test area; and comparing the displayed test data with the base data to determine the extent of underground contamination within the test area. - View Dependent Claims (16, 17, 18, 19)
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Specification