||Subsurface Biological Activity in Relation to Ground Water Pollution.
Dunla, William J. ;
McNab, James F. ;
||Robert S. Kerr Environmental Research Lab., Ada, Okla. National Ground Water Research Program.
Ground water ;
Water pollution ;
Subsurface investigations ;
Anaerobic bacteria ;
Hydrostatic pressure ;
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Biological activity occurring in subsurface regions below the soil zone may be of considerable importance in determining the fate and effect of pollutants in ground water. This paper comprises a discussion of subsurface biological activity in regard to ground-water pollution as reflected by available literature references. The subsurface environment is discussed in terms of factors likely to be of greatest significance in regard to the development of biological systems, and previous investigations of subsurface microbial activity are reviewed. Previous investigations of subsurface microbial activity clearly show the presence of diverse microbial populations in many subsurface regions below the soil zone. Hence, microbial activity appears both possible and probable in most subsurface regions of importance in regard to ground water. (Modified author abstract)