Description
Item Description:Title from title screen (viewed July 21, 2009).
"February, 2009."
"EPA/600/R-09/026."
"Cooperative agreement number 83124401."
Electronic resource.
Physical Description:81 unnumbered pages : digital, PDF file.
Format:Mode of access: Internet from the EPA web site. Address as of 7/21/09: http://www.epa.gov/nrmrl/pubs/600r09026/600r09026.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references (pages 6-1 - 6-3).