We collected sediment cores from a lake on the Ardley ... using a 12-cm-diameter PVC pipe. One 67.5-cm core (Y2) spanned almost 3,000 radiocarbon years. This core was sectioned at 1.0-cm intervals ...

A small team of researchers from France and the U.K. has found evidence of lead pipe construction by the ... which included extracting core samples from Ostia and Portus harbors and analyzing ...

Long sediment cores are generally collected by allowing a core pipe with a lead weight on top to fall through the water and into soft sediment that collects on the seafloor over long periods of time.

NEW YORK (Reuters) - Oil major BP Plc knew as early as 2002 of an "appreciable" buildup of potentially corrosive sediment in a segment ... to clean the pipe with a device that scrapes residue ...