Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Bacterial Movement through Fractured Bedrock.
Author Morriso, S. M. ; Alle, Martin J. ;
CORP Author Colorado State Univ., Fort Collins. Environmental Resources Center.
Year Published 1972
Report Number Completion-32; DI-14-01-0001-1882; OWRR-B-023-COLO; 00943,; B-023-COLO(1)
Stock Number PB-212 713
Additional Subjects ( Ground water ; Water pollution) ; ( Water pollution ; Bacteria) ; ( Bacteria ; Percolation) ; ( Sewage disposal ; Hydrogeology) ; ( Septic tanks ; Water pollution) ; Subsurface drainage ; Mountains ; Water wells ; Public health ; Hydrology ; Bacillus ; Coliform bacteria ; Water quality ; Geological joints ; Bedrock
Library Call Number Additional Info Location Last
NTIS  PB-212 713 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 117p
Movement of bacteria-laden waters percolating through fractured bedrock was examined to determine whether effluent originating from conventional waste disposal systems could contaminate shallow ground water supplies. Inoculated waters were injected into holes and/or wells at two geologically different test sites to evaluate the extent of microbial filtration of leachfield effluent in or along bedrock fractures. Injection waters, inoculation with Bacillus stearothermophilis, were found to be readily transported by the ground water gradient into a downslope well. Continued bacteriological analysis showed the tracer bacterium to be present for at least 6 days after inoculation. At mountain building sites, it is essential that either hydrogeologic data, such as bedrock fracture patterns, depth and movement of ground waters, seasonal fluctuations in ground water levels, be fully ascertained prior to installation of waste disposal systems.