Construction of Class 1, 1C, 2, 2C, 3, 3C and 4 Vessels; Class 1, 2 and 3 Piping Systems and Shop Assembly; Class 1, 2, 3 and 4 Welded and Non-Welded Supports; for which overall responsibility is retained and for which all fabrication and installation is subcontracted to other appropriate Certificate of Authorization Holders; At the above location and at CNSC Licensed Field Sites controlled by the above location only with additional Code activities as described in the Quality Program Manual at 110 Scotia Ct-Unit 27, Whitby, Ontario, L1N 8Y7 controlled by above location only. In accordance with CSA Standard N285.0, General Requirements for Pressure Retaining Systems and Components in CANDU Nuclear Power Plants.