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OLS Field Name OLS Field Data
Main Title Assessing Chemical Releases and Worker Exposures from a Filter Press.
Author Scott, J. ; Sherban, K. ; Marshall, M. ;
CORP Author Southwest Research Inst., San Antonio, TX.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher Oct 89
Year Published 1989
Report Number EPA-R-813355; SWRI-01-1236; EPA/600/2-89/052;
Stock Number PB90-119587
Additional Subjects Environmental surveys ; Waste treatment ; Waste water ; Copper ; Industrial medicine ; Exposure ; Hazardous materials ; Risk assessment ; Occupational safety and health ; Environmental monitoring
Library Call Number Additional Info Location Last
NTIS  PB90-119587 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
Collation 125p
Abstract Chemical releases and worker exposures associated with the filtration of an industrial wastewater sludge were characterized. The filter was a recessed chamber filter press with an open filtrate discharge system. Chemical releases and worker exposures for a selected chemical were measured over four operational cycles and various aspects of the filtration operation believed to influence the measurement values were documented. Ventilation patterns around the filter press were monitored. The worker's time-weighted average exposures to total copper (low vapor pressure, highly insoluble form) during the 113-minute operational cycle ranged from 3.1 to 25 micro g/cu m. To sludge feed and filter cake copper concentrations were approximately 0.1 and 1.0 weight percent. A noticeable difference in worker techniques was observed which may account for the large range of inhalation exposures during the cake removal stage. During this stage, the inhalation exposures ranged from 11 micro g/cu m to 130 micro g/cu m. The manual removal of filter cake comprised only 15% of the time in an average filtration cycle, but produced 72% of the worker's inhalation exposure.
Supplementary Notes Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Category Codes 57U; 68G; 68C
NTIS Prices PC A06/MF A01
Primary Description 600/14
Document Type NT
Cataloging Source NTIS/MT
Control Number 936218913
Origin NTIS
Type CAT