VOCs, once in the ground, can be present for a very long time. Even when they reach an aquifer, the speed of flow is often measured in just a few minutes per year.
Contaminationmay be found by chance in springs and wells or when dewatering construction sites. Or it may be surveyed and quantified when pollution, recent or long past, is known to have occurred.
The necessity for remediation is most immediate where a spring or well is needed for use, or where excavation water is too polluted to be disposed of without treatment.
Stripping by packed tower aeration offers an effective and economical approach to many VOC contamination scenarios and Forbes has considerable experience in the design and fabrication of stripping installations.
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