Specifications_For_The_Repair_of_Substation_Transformer_AC_21_(2).pdf

This specification document outlines repair and refurbishment requirements for the City of Palo Alto Utilities Department's Adobe Creek Transformer-21, a 15 MVA Allis Chalmers substation transformer located in Santa Clara County, California. The primary scope involves replacing a 1967 TLH-21 on-load tap changer (OLTC) with a certified remanufactured unit, managing approximately 5,108 gallons of transformer oil (4,348 gallons from the main tank and 760 gallons from the OLTC tank), resealing all interfaces to prevent oil migration, replacing radiator valves and gaskets on six radiators, removing and replacing the 60 kV SMD fuse holder, and performing comprehensive pre- and post-work diagnostic testing. Pre-work testing includes power factor analysis of primary bushings and windings, turns ratio testing (TTR) on all OLTC positions, excitation testing, winding resistance measurement, and dissolved gas analysis (DGA) with oil quality assessment. Post-work testing includes identical diagnostic procedures plus sweep frequency response analysis (SFRA). The contractor must provide all labor, equipment, and materials, while the City assumes responsibility for de-energizing, disconnecting, isolating, and grounding the transformer and disposing of oil not designated for reuse. Bidding closed on April 9, 2026, with work anticipated to commence July 1, 2026, and completion required within eighty calendar days from the Notice to Proceed.

The contract is subject to a $500 per day liquidated damages clause for delays beyond the completion date. Bidders exceeding $25,000 must submit a 10 percent bid bond, and the selected contractor must furnish 100 percent performance and payment surety bonds within ten business days of award. All contractors must register with the California Department of Industrial Relations and comply with prevailing wage requirements under California Labor Code Sections 1720 et seq. The City will award the contract to the lowest responsive and responsible bidder based on demonstrated ability, experience, capacity, equipment, resources, and satisfactory performance record. No specific incumbent vendors, set-asides for disadvantaged enterprises, or disclosed budget amounts are identified in the procurement documents, and the contract is governed by California law with venue in Santa Clara County.