The new ducting section connecting the existing duct termination in the TCS space to the NHC partition wall has been installed by Smith Sheet Metal contractors.  The installation drawing is IRH1618.  There was not enough clearance between the duct pipe and the TCS vessel to butt weld the new ductwork as originally intended.  Instead a flange was welded to the existing pipe and also to the new section and the two were bolted together.  Drawings of the modifications have been provided by the contractor, and as-built drawings will be completed at a later date.  There was not time for the contractor to fabricate a gasket for the flanged joint, so one will be installed by TRIUMF at a later date and included in the as-built drawing package.