Renovation of a civil project in Fairfield, California. Conceptual plans call for the renovation of a water / sewer project.

The Fairfield-Suisun Sewer District (District) is requesting Proposals from qualified, multi-disciplinary engineering firms to provide civil, structural, and mechanical engineering services for the Electrical Replacement Phase 2 (ERP-2) Project. The requested services will support electrical and controls design work which is currently underway (90% design stage) via a separate design firm. The goal of all work is to provide critical standby power system upgrades to one of the Wastewater Treatment Plant's Electrical 12kV-480V Substation power distribution facilities (in Fairfield, CA) and one offsite Suisun Pump Station (in Suisun City, CA). Project Scope: The project scope for power system upgrades to the Wastewater Treatment Plant Electrical Substation "D" (12kV-480V) generally consists of providing civil, structural, and mechanical engineering services to supplement ongoing electrical and controls design work currently at the 90% design stage. The project will remove existing Substation "D" electrical facilities (switchgear, motor control centers, control panels, and other critical electrical equipment) and install a new prefabricated electrical building which will function as the new Electrical Substation "D" facility. The scope also includes preparing the foundation and site design for the new Substation building, two transformer pads, and approximately 800 linear feet of interconnecting duct bank and related above and below ground improvements needed to extend new power feeders to the underside of the new building, and other site work needed to intercept and extend power feeders and controls from the existing substation facility to the underside of the new building. The project scope for standby power system upgrades at the offsite Suisun Pump Station generally consists of providing civil, structural, and mechanical engineering services to support ongoing electrical and controls design work needed to install a new, 1,250kW standby diesel generator and 2,970-gallon belly fuel tank housed inside a weatherproof enclosure with SCR/UREA emissions controls installed on top of the enclosure. The new generator, enclosure, and emissions control system will be installed together on top of an elevated concrete pad meeting local building codes and related requirements for construction within FEMA's designated Special Flood Hazard Area (Zone AE). New power and controls will connect the generator to a new termination switchboard and Automatic Transfer Switch located inside the Pump Station Building. Other requested design services are anticipated to include preparing the site design for removal of an existing aboveground diesel fuel storage tank, including concrete containment bay and related piping and controls, and preparing the site and foundation designs needed to relocate the pump station's odor scrubber facility and related power and controls, and installation of new interconnecting duct bank and other related electrical, mechanical, and civil site improvements. Deadline for submitting questions: February 12, 2025