Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Lake Tahoe visibility study /
Author Pitchford, M. L. ; Allison, D.
Other Authors
Author Title of a Work
Allison, Daniel.
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher U.S. Environmental Prtection Agency, Environmental Monitoring Systems Laboratory,
Year Published 1983
Report Number EPA 600-J-84-289
Stock Number PB85-198273
OCLC Number 84743168
Subjects Tahoe, Lake, Watershed (Calif. and Nev.) ; Automobiles--Motors--Exhaust gas. ; United States--Lake Tahoe Watershed.
Additional Subjects Visibility ; Particles ; Air pollution ; Sources ; Sampling ; Concentration(Composition) ; Chemical analysis ; Fines ; Residential buildings ; Wood ; Combustion products ; Exhaust emissions ; Reprints ; Air quality ; Air pollution sampling ; Air pollution detection ; Lake Tahoe Basin ; Wood stoves ; Automobile exhaust
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-J-84-289 Headquarters Library/Washington,DC 08/29/2011
ERAD  EPA 600/J-84-289 Region 9 Library/San Francisco,CA 04/11/2011
NTIS  PB85-198273 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 07/22/2019
Collation 12 unnumbered pages : illustrations
Visibility monitoring and airborne particulate sampling in the Lake Tahoe Basin were used to document visual air quality levels and to assess the relative impacts of major contributing emission source categories. Visibility data were obtained by long path contrast and particle scattering techniques. Particles were sampled in two size ranges at three locations and were analyzed for mass concentration and composition of elements greater in atomic weight than Na. Statistical analysis showed fine particle concentration (particle diameter less than 2.5 micrometers) to be related to visibility. A model was developed to apportion all of the fine particle mass to source categories. The results of this effort were then used to determine an optical extinction budget by particle source. This study indicates 70% of the basin-wide visibility impact and 30% of the South Lake Tahoe visibility impact are caused by natural and long range transported emissions. Residential wood smoke emissions are responsible for the majority of the remaining impact; at South Lake Tahoe automotive emissions are also significant.
"EPA/600/J-84/289." TS and 8192, February 1983.