Title from PDF title screen (viewed on July 25, 2008).
At head of title: Toxic Substances Hydrology Program.
At head of title on HTML title screen: Massachusetts and Rhode Island Water Science Center.
"June 2006."
Mode of access: Internet from the USGS web site. Address as of 7/25/08: http://pubs.usgs.gov/fs/2006/3096/pdf/fs2006%5F3096.pdf; current access available via PURL.