Record Display for the EPA National Library Catalog


Main Title Monitoring water filters for asbestos removal
Author Logsdon, Gary S. ; Symons, James M. ; Sorg, Thomas J.
Other Authors
Author Title of a Work
Sorg, Thomas J.
Symons, James M.
CORP Author Municipal Environmental Research Lab., Cincinnati, OH.
Publisher U.S. Environmental Protection Agency,
Year Published 1981
Report Number EPA-600/ J-80-167
Stock Number PB82-205956
OCLC Number 07655378
Additional Subjects Asbestos ; Filtration ; Water treatment ; Fibers ; Monitoring ; Amphiboles ; Diatomaceous earth ; Granular materials ; Turbidity ; Reprints
Library Call Number Additional Info Location Last
ELBD  EPA 600-J-80-167 AWBERC Library/Cincinnati,OH 01/17/2003
NTIS  PB82-205956 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 34 p. : ill. ; 28 cm.
Water filtration processes can reduce the asbestos fiber count in drinking water by 90 to 99.9 percent, or more. Effective fiber removal requires very close control of the treatment process. Monitoring of filtered water turbidity can indicate the efficacy of treatment, even though the asbestos fiber concentration is too low to register as turbidity. Turbidity monitoring works because when water is properly prepared for filtration, passage of asbestos fibers through the filter is indicated by the passage of floc, as shown by higher turbidity. Filtered water turbidity should be 0.10 ntu or below for best fiber removal. Continuous monitoring of each filter module at a treatment plant is recommended. These findings are based on studies at Duluth, Two Harbors, and Silver Bay on Lake Superior; Seattle's Tolt reservoir, and on data obtained from the San Francisco Bay area.