Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Comparison of Opacity Measurements by Trained Observer and In-Stack Transmissometer.
Author Conner, William D. ; McElhoe, Harold B. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-600/J-82-282;
Stock Number PB83-169714
Additional Subjects Particles ; Chimneys ; Air pollution ; Opacity ; Comparison ; Sites ; Sampling ; Field tests ; Visibility ; Transmissometers ; Reprints ; Air pollution sampling
Library Call Number Additional Info Location Last
NTIS  PB83-169714 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 6p
Measurements of opacity of particulate emissions by trained observer and by instack transmissometer were compared on 26 different occasions at 17 different stacks and 13 different plants to see how well these two commonly used methods would agree when applied to real plants under field conditions. During the study opacities ranging from 2 percent to 57 percent were measured. In general, agreement of + or - 10 percent opacity may be expected between observer and transmissometer measurements when observer measurements are at the stack exit and ambient conditions permit good visibility of plume.