Well No. 10 GAC Treatment and System Upgrades

The City of Norwalk is soliciting bids to design, construct, and commission a comprehensive Granular‑Activated‑Carbon (GAC) treatment upgrade at Well No. 10. The contractor must provide all labor, materials, equipment, demolition, civil works, mechanical installation, electrical and instrumentation integration, and start‑up services required to deliver a fully operational treatment system that meets EPA and state drinking‑water standards. Funding includes up to $2 M from the Water Replenishment District (WRD) with additional city funds. The project schedule mandates a 270‑working‑day construction period, with field work commencing 19 Jan 2027 and completing 1 Feb 2028. • Furnish and install new well pump, motor, and re‑configure vault piping, PRV, and pressure‑reducing stations. • Supply and install four steel GAC pressure vessels, pre‑filters, a backwash tank, and associated piping, valves, flow meters, and instrumentation. • Install sodium‑hypochlorite disinfection system, chemical storage shelter, and integrated monitoring/control (SCADA) upgrades. • Provide full civil works: new access drive, equipment pads, storm‑water dry‑well, and site grading. • Deliver complete electrical, conduit, lighting, MCC, VFD panels, and testing/commissioning, plus training and documentation.