Work consists of heat exchangers and pipe routing; scum beach and hoppers including pipe, valves, heat trace (water jackets), insulation, and related appurtenances; primary scum pumps including core drilling, concrete housekeeping pad modifications pipe, valves, hydronic heat trace, and appurtenances; in-line macerators including pipe and appurtenances; new pipe insulation and appurtenances on pipe upgrades and where insulation was removed for replacement; mechanical chiller unit and associated piping and control, heating system pumps, coil and piping, acid tank site tubes, chlorine gas valves and piping and chemical sensors.