Record Display for the EPA National Library Catalog

RECORD NUMBER: 15 OF 52

OLS Field Name OLS Field Data
Main Title Detection and mapping of insoluble sinking pollutants {Microfiche}
Author Meyer, Raymond A. ; Kirsch, Milton ; Marx, Larry F.
Other Authors
Author Title of a Work
Kirsch, Milton.
Marx, Larry F.
CORP Author Rockwell International, Newbury Park, CA. Environmental Monitoring and Services Center.;Municipal Environmental Research Lab., Cincinnati, OH.
Publisher Municipal Environmental Research Laboratory,
Year Published 1981
Report Number EPA-68-03-2648; EPA-600/2-81-198
Stock Number PB82-105586
Subjects Hazardous substances--Accidents ; Water--Pollution
Additional Subjects Hazardous materials ; Water pollution ; Acoustic detection ; Underwater sound equipment ; Underwater acoustics ; Electrical resistivity
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB82-105586 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 92 p. : ill.
Abstract
A continuous submersible monitor using a cyclically purged electrical conductivity probe capable of long-term deployment even when buried in sand or silt has been conceived, designed, and tested. The submersible unit, which is battery-powered and has no connection to the shore-based receiver, will transmit the conductivity data via ultrasonic transmission. The unattended design life of the monitor will be 1 year. Based upon the reflection principles of high-frequency underwater acoustics, a commercial 200-kHz depth-finder system has been extensively modified and tested. Laboratory tests have indicated that the system is capable of resolving the echoes from the surface of a 1-cm-deep layer of carbon tetrachloride (CCl4) from those returning from a hard, sandy or muddy bottom. Field testing indicated that few precursors to the bottom echo return are present that might mask or interfere with the detection of an echo from a pollutant pool. Return echoes were evaluated by 16-mm motion picture photography and a computer-based comparator-counter technique has been developed for data management. Recommendations for further development and rapid deployment of the pollutant mapping system are also presented.
Notes
Bibliography: p. 47. Microfiche