Description
Item Description:Title from title screen (viewed on June 12, 2008).
"April 2006."
"U.S. EPA contract number 68-C-00-185, task order number 0012."
"EPA/600/R-06/030."
Electronic resource.
Physical Description:xii, 66 pages : digital, PDF file
Format:Mode of access: Internet from the EPA web site. Address as of 6/12/2008: http://www.epa.gov/nrmrl/pubs/600r06030/600r06030.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references (pages 53-54).