Abingdon Water Treatment Plant pH Control System Upgrade

Harford County, Maryland is requesting bids for removal and replacement of the existing Soda Ash System processing equipment and associated loop piping at the Abingdon Water Treatment Plant pH Control System, with bids due September 16, 2026.

The scope encompasses six lump-sum base bid items: mobilization (not to exceed 5% of total bid price), Soda Ash Feed System Silo Feed System replacement, Soda Ash Mixing and Feed System addition, Caustic Soda Chemical Feed Equipment and Containment Area, Caustic Soda Chemical Bulk Storage Tanks, and Caustic Soda Chemical Day Tanks. Three contingent unit-price items are included: Additional SCADA Programming (80 hours), Additional Electrical Conduit (400 linear feet), and Roofing Repair (40 hours). Electrical work must comply with the National Electrical Code (NFPA 70) and applicable local codes; specifications include minimum 3/4-inch conduit and #12 AWG wire, NEMA 4X rated disconnect switches and controllers, and THHN/THWN-2 interior wiring. The contractor must provide a construction schedule allowing daily facility operation without interruption, conduct a pre-construction site visit to evaluate existing conditions, and obtain owner approval for any equipment de-energization. All electrical equipment must be installed with 1/4-inch spacing from mounting surfaces using stainless steel spacers.

Bidders must submit an Affidavit of Qualification to Bid certifying no convictions or admissions of bribery-related offenses under Maryland law; an Affidavit of Non-Collusion; bid security; evidence of authority to do business in Maryland; and a contractor's license number. Required insurance includes Commercial General Liability, Employers Liability, and Contractors Pollution Liability with specified minimum limits and endorsements (CG 20 10 and CG 20 37 with 11-85 edition dates or later). Bid security and all bid documents must accompany sealed bid submissions. The bid remains subject to acceptance for 120 days after bid opening. Bidders must acknowledge that estimated quantities are not guaranteed and are solely for bid comparison purposes.