Protecting Your Water

Seismologists Devise New Technique to Measure Pollution

January 1, 2008

Seismologists have tested a new way to measure the concentration of the dangerous groundwater contaminant Trichloroethylene (TCE). Ultrasonic waves called P-waves are sent through ground containing water that may be laced with TCE. The presence of TCE can be detected by measuring reductions in P-wave velocities. Seismic detection can be combined with ground penetrating radar to reveal the location of dense liquid pollutants where remediation is needed.

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WHAT IS HAZARDOUS WASTE? In the U.S., hazardous waste is defined as any discarded solid or liquid that is highly corrosive, toxic, reactive enough to release toxic fumes, or easily ignited. It can include solvents, pesticides, and spilled chemicals -- including acids, ammonia, chlorine bleach and other industrial cleaning agents -- as well as most heavy metals.
Long-term exposure to hazardous waste can lead to chronic respiratory diseases such as asthma, damaged liver and kidneys, or cancer. Poisoning and chemical burns can result from contact with even small amounts of toxic chemical waste. Even brief exposure can cause headaches, dizziness, and nausea.
Even non-hazardous, organic human waste that is not properly managed can be a serious health hazard, since it ferments and creates a good environment to let bacteria and other germs grow. The waste also attracts flies, rats, and other creatures that become infected and can spread infectious diseases, including malaria and plague.

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TO GO INSIDE THIS SCIENCE:

Jil T. Geller
Lawrence Berkeley National Laboratory
Berkeley, CAý 94720
jtgeller@lbl.gov
510-486-7313
510-486-5686

To Go Inside This Science:
American Geophysical Union
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Washington, DC 20009-1277
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American Water Works Association
Denver, CO

Incorporated Research Institutions for Seismology
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Tel: 202-682-2220

AGU is a worldwide scientific community that advances, through unselfish cooperation in research, the understanding of Earth and space for the benefit of humanity.