The sheet metal panel covering the NHC/SHC feedthrough port was removed today using a slide-hammer to pull out the concrete anchors (this oversized panel would have interfered with the NHC partition wall).  50cpm was found on the inside of the panel, 100cpm on the NHC side lip of the feedthrough, and 350cpm on the face of the shielding bricks in the feedthrough.  Various dimensional measurements of the feedthrough were taken which will be added to the partition wall Solidworks model (IRH1609).  The panel was bagged for disposal and a temporary 20"x20" panel was put over the feedthrough and secured with duct tape.  A permanent panel with anchored supports that is compatible with the NHC partition wall will be designed and installed at a later date.  A swipe of the NHC walls and floor picked up 30cpm after completion of the job.