City of Norwalk PlanetBids #IFB No. 27-880

Well No. 10 GAC Water-Treatment System Construction and Equipment Upgrade

The City of Norwalk is seeking a lump-sum construction bid to upgrade its Well No. 10 drinking-water treatment system. - Government buyer: City of Norwalk, Public Services Department; project plans identify the Norwalk Municipal Water System. The U.S. Army Corps of Engineers, South Pacific Division, Los Angeles District, is named in an attached background groundwater study, not as the buyer for this solicitation. - Scope: Construct and install a granular activated carbon (GAC) treatment system rated at 2,000 gallons per minute, with four 12-foot-diameter vessels, chemical treatment, process piping, pumps, instrumentation, electrical upgrades, and site and civil improvements. Work also includes demolition and salvage, PRV station and vault piping work, equipment pads, an access drive, yard lighting, and a stormwater drywell. - Products and quantities: Four GAC vessels; one GAC treatment system; one cartridge filter system; one backwash-water reclaim tank; one 1,550-gallon sodium hypochlorite tank; one 200-gallon orthophosphate tank; two sodium hypochlorite metering pumps; two orthophosphate metering pumps; one analyzer panel; one static mixer; one remote I/O cabinet; one well-pump VFD; one replacement well-pump motor; two flowmeters; three exhaust fans; one emergency shower/eye-wash unit; and one well pump. An area light fixture and GAC prefilters are also specified, but quantities are not stated. See line-item details for specifications and part numbers. - Named OEMs and manufacturers: Poly Processing, Albin, Hach, Westfall, Allen-Bradley, McCrometer, Lithonia, and Haws. Several items permit an approved equal; the flowmeters are specified as McCrometer Ultramag or approved equal. - Other named vendors/prospective bidders: Canyon Springs Enterprises; Mehta Mechanical Company Inc; Metro Builders & Engineers Group, Ltd.; MINAKO AMERICA CORPORATION; and Pacific Hydrotech Corporation. - Notable requirements: Integrate with the existing PLC/SCADA system and provide a new remote I/O panel. The treatment system must address VOCs, including benzene, and meet applicable USEPA and SWRCB water-quality standards; the project also supports a groundwater production requirement of 473 acre-feet per year. Construction cannot begin before written WRD design approval. WRD funding is up to $2,000,000 for allowable costs. Funding-related requirements include prevailing wages, records, audits, inspections, and reporting. A separate agreement would be needed if the contractor is responsible for the project's 20-year operation and maintenance obligations.

Description

The City of Norwalk is seeking bids for upgrades to its Well No. 10 treatment system. Work includes site clearing, demolition and salvage, installation of a new well pump and motor, vault piping and pressure reducing valve work, and a granular activated carbon system with four steel pressure vessels, prefilters, and a backwash tank. The scope also includes a sodium hypochlorite disinfection system, electrical and instrumentation integration with the onsite SCADA system, yard lighting, and civil improvements such as an access drive, equipment pads, and stormwater drywell system. A mandatory pre-bid meeting is scheduled for October 22, 2026, and electronic bid responses are due November 5, 2026.

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