RFQ Contractor - Difficult Run Pump Station Grit Mitigation and Odor Control Improvements

Fairfax County is soliciting pre-bid qualifications for the construction of the Difficult Run Pump Station Grit Mitigation and Odor Control Improvements Project. Project consist of the installation: Upgrades inside the station shall include installation of two new wastewater pumps, associated piping, valves, and variable frequency drives; replacement of ferrous sulfate storage tanks and chemical addition pumps, installation of new chemical injection port; demolition of existing chemical piping; structural repairs; and associated electrical and instrumentation and controls modifications and upgrades. Exterior improvements include modification of the diversion structure; installation of isolation gate; replacement of an existing isolation gate; and associated electrical and instrumentation and controls modifications and upgrades; and associated site work. . The General Contract for this project is anticipated to be advertised for bid in November 2022 with bid opening in December 2022. The projected Contract Award date is planned for March 2023, with an anticipated construction start of April 2023. The overall construction duration is planned to be 400 calendar days. These are estimated dates and durations and are subject to change. The cost for this project is estimated to be between $2 to $3 million.

Division 03 -	Concrete.
Division 04 -	Masonry.
Division 05 -	Metals.
Division 06 -	Wood, Plastics, and Composites.
Division 07 -	Thermal and Moisture Protection.
Division 08 -	Openings.
Division 09 -	Finishes.
Division 10 -	Specialties, Signage, Toilet, Bath, and Laundry Accessories, Fire Protection Specialties, Fire Extinguishers, Storage Specialties.
Division 11 -	Equipment.
Division 12 -	Furnishings.
Division 14 -	Conveying Equipment, Scaffolding.
Division 21 -	Fire Suppression.
Division 22 -	Plumbing.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC).
Division 26 -	Electrical.
Division 27 -	Communications, Data Communications, Voice Communications, Audio-Video Systems.
Division 28 -	Electronic Safety and Security.
Division 31 -	Earthwork.
Division 32 -	Exterior Improvements, Fences and Gates, Turf and Grasses.
Division 33 -	Utilities, Common Work Results for Utilities, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wastewater Utility Pumping Stations, Sanitary Utility Sewerage Force Mains.
Division 40 -	Process Integration, Water Process Piping.
Division 45 -	Industry-Specific Manufacturing Equipment.
Division 46 -	Water and Wastewater Equipment.