Oxford Journals
Oxford University Press
From ENVIRON International Corporation, Arlington, VA..
Abbreviations: EPA, US Environmental Protection Agency; FDA, US Food and Drug Administration; NRC, National Research Council; OSHA, Occupational Safety and Health Administration
NOTES
Reprint requests to Dr. Joseph Rodricks, ENVIRON International Corporation, 4350 North Fairfax Drive, Arlington, VA 22203 (e-mail: jrodricks{at}environcorp.com).
Received for publication November 22, 2000. Accepted for publication June 11, 2001.