Sun Plaza Waterproofing Project Sun Plaza Medan Jl. Haji Zainul Arifin No.7 Medan 20152, Indonesia Completion Date Product Volume 2003 HPI System 3,519 m3 Area Completed : Basement Slab as -6,-4 & Retaining Wall as -6,-4 (2 level), STP & GWT Architect PT. Arkipuri International Engineer PT. Gistama Inti Semesta Contractor PT. UE Sentosa Developer/Owner PT. Manunggal Wiratama