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Measurement of volatile organic chemicals at selected sites in CaliforniaUrban air concentrations of 24 selected volatile organic chemicals that may be potentially hazardous to human health and environment were measured during field experiments conducted at two California locations, at Houston, and at Denver. Chemicals measured included chlorofluorocarbons, halomethanes, haloethanes, halopropanes, chloroethylenes, and aromatic hydrocarbons. With emphasis on California sites, data from these studies are analyzed and interpreted with respect to variabilities in ambient air concentrations, diurnal changes, relation to prevailing meteorology, sources and trends. Except in a few instances, mean concentrations are typically between 0 and 5 ppb. Significant variabilities in atmospheric concentrations associated with intense sources and adverse meteorological conditions are shown to exist. In addition to short-term variability, there is evidence of systematic diurnal and seasonal trends. In some instances it is possible to detect declining trends resulting from the effectiveness of control strategies.
Document ID
19930051701
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Singh, Hanwant B.
(NASA Ames Research Center Moffett Field, CA, United States)
Salas, L.
(NASA Ames Research Center Moffett Field, CA, United States)
Viezee, W.
(SRI International Menlo Park, CA, United States)
Sitton, B.
(Synernet Corp. Moffett Field, CA, United States)
Ferek, R.
(Washington Univ. Seattle, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Atmospheric Environment
Volume: 26A
Issue: 16
ISSN: 0004-6981
Subject Category
Environment Pollution
Accession Number
93A35698
Funding Number(s)
CONTRACT_GRANT: EPA-CR809282
Distribution Limits
Public
Copyright
Other

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