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OLS Field Name OLS Field Data
Main Title Assesing Transboundary Influences in the Lower Rio Grande Valley.
Author Mukerjee, S. ; Shadwick, D. S. ; Dean, K. E. ; Carmichael, L. Y. ;
CORP Author ManTech Environmental Technology, Inc., Research Triangle Park, NC. ;Texas Natural Resource Conservation Commission, Austin.;Environmental Protection Agency, Research Triangle Park, NC.
Publisher 1999
Year Published 1999
Report Number EPA-68-D2-0134 ;EPA-68-D5-0049; EPA/600/A-02/063;
Stock Number PB2002-106743
Additional Subjects United States ; Mexico ; Boundaries ; Air pollution monitoring ; Atmospheric transport ; Rio Grande River ; River basins ; Texas ; Environmental transport ; Air pollutants ; Air pollution sampling ; Plumes ; Particulates ; Hydrocarbons ; Carbon ; Pesticides ; Ecological concentration ; Wind direction ; Meteorological data ; Temporal variations ; Volatile organic compounds ; Urban areas ; Rural areas ;
Library Call Number Additional Info Location Last
NTIS  PB2002-106743 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 10/23/2002
Collation 22p
Abstract The Lower Rio Grande Valley Transboundary Air Pollution Project (TAPP) was a U.S.-Mexico Border XXI Program project to assess transboundary air pollution in and near Brownsville, Texas. The study used a three-site air monitoring network very close to the border to capture the direct impact of local sources and transboundary transport. Ambient data included particulate mass and elemental composition, VOCs, PAHs, pesticides, and meteorology. Also, near real-time PM2.5 mass measurements captured potential pollutant plume events occurring over 1-h periods. Data collected were compared to screening levels and pollutant plume events occurring over 1-h periods. Data collected were compared to screening levels and other monitoring data to assess general air pollution impacts on nearby border communities. Wind sector analyses, chemical tracer analyses, principal component analyses, and other techniques were used to assess the extent of transboundary transport of air pollutants and identify possible transboundary air pollution sources. Overall, ambient levels were comparable to or lower than other urban and rural areas in Texas and elsewhere. Movement of air pollution across the border did not appear to cause noticeable deterioration of air quality on the U.S. side of the Lower Rio Grande Valley. Dominant southwesterly winds from the Gulf of Mexico were largely responsible for the clean air conditions in the Brownsville airshed. Few observations of pollutants exceeded effects screening levels, almost all being VOCs; these appeared to be due to local events and immediate influences, not regional phenomena or persistent transboundary plumes.
Supplementary Notes Prepared in cooperation with Texas Natural Resource Conservation Commission, Austin. Sponsored by Environmental Protection Agency, Research Triangle Park, NC.
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NTIS Title Notes Rept. for Mar 96-Mar 97.
Category Codes 68A
NTIS Prices PC A03/MF A01
Primary Description 200/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 029500240
Origin NTIS
Type CAT