The Meson Hall RH Lab Warm Cell was used by Beamlines Group for hydrostatic testing of the TNF heat exchanger.  The location was chosen because of access to a water supply, active drain, and the heat exchanger has removable contamination.  The work took place on April 30th and May 1, 2015.  New plastic sheet was placed over the 6 foot block in the center of the warm cell which was used as a work area.  The plastic was removed after completion of the job.  The floor around the block was swiped and 100cpm contamination was found.

See attached photos.