New facility expansion to accommodate replacement of end-of-life equipment for a polymerization process. Process consisted of two (2) 12,000 gallon glass-lined reactors and supplementary equipment/instrumentation, spanning three (3) levels of the new building. Due to the critical nature of production, cost analysis was performed in the conceptual phase and determined it was possible to replace the systems in parallel, to reduce risk exposure. A building addition was designed and constructed to house the new installation. New HVAC, drainage, egress, and tepid water was incorporated to dramatically improve the function and safety housing the process. Based on Javan’s suggestion, the opportunity was taken to redesign the reactor temperature control loops. The redesigned closed loops incorporated existing utilities to improve control, response time and longevity of the equipment. Due to the hazardous nature of the continuing process during construction, all piping was shop-fabricated and installed as spools, based on provided isometric drawings from the 3D model. The intent was to provide a seamless changeover for production, without interruption, upon completion.