Improvements to the PST Scum Collection System at the Patapsco Wastewater Treatment Plant

** As of February 2, 2023 this project has not yet been awarded. A timeline or award has not yet been established.** Principal items of work for this contract include, but are not limited to: 1. Remove and replace existing scum troughs, actuators, isolation valves, and all associated appurtenances typical for all Primary Settling Tanks (PSTs), Drain and clean all PSTs. 2. Remove and Replace Existing Scum Pump, Pump Control Panel, electrical support devices, and all associated appurtenances for north scum pit. Provide new pit isolation valve and davit crane. 3. Remove and provide new pump discharge piping, air mixing piping, and mixing system for north scum pit. Pump discharge piping to be provided to Sludge Blending Tanks (SBTs) and Gravity Sludge Thickener (GST) Distribution Box. 4. Remove and replace existing scum pump, pump control panel, electrical support devices, and all associated appurtenances for Scum Pit No. 2. Provide new pit isolation valves, mixing system, and davit crane. 5. Remove and provide new pump discharge piping, air mixing piping, and mixing system for scum Pit No. 2. Pump discharge piping to be provided to Sludge Blending Tanks (SBTs) and Gravity Sludge Thickener (GST) Distribution Box. 6. Remove and provide new scum discharge piping, valves, sludge blending tank penetrations, and pipe connections. 7. Provide new scum baffles at PST Nos. 1-3. 8. Abandon existing scum well. 9. Provide new scum piping at GST distribution channel. 10. Improvements to process control system. All contractors bidding on this Contract must first be prequalified by the City of Baltimore Contractors Qualification Committee. Interested parties should call (410) 396-6883 or contact OBC at 4 S Frederick St., 4th Floor, Baltimore, MD 21202. If a bid is submitted by a joint venture (JV), then in that event, the document that established the JV shall be submitted with the bid for verification purposes. The Prequalification Category required for bidding on this project is E13003 Water and/or Sewer Treatment Plants and Pumping Stations. The MBE goal is 13% The WBE goal is 5% Cost Qualification Range for this work shall be $5,000,000.01 to $10,000,000.00. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Precast Concrete.
Division 04 -	Masonry, Unit Masonry.
Division 05 -	Metals, Structural Metal Framing, Metal Fabrications.
Division 06 -	Wood, Plastics, and Composites, Rough Carpentry.
Division 07 -	Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.
Division 08 -	Openings, Doors and Frames, Windows, Hardware.
Division 09 -	Finishes, Painting and Coating.
Division 10 -	Specialties, Signage, Compartments and Cubicles, Emergency Aid Specialties, Fire Protection Specialties, Storage Assemblies.
Division 11 -	Equipment, Laboratory Equipment.
Division 14 -	Conveying Equipment.
Division 21 -	Fire Suppression, Fire-Extinguishing Systems.
Division 22 -	Plumbing, Instrumentation and Control for Plumbing, Plumbing Piping, Plumbing Equipment, Plumbing Fixtures.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems, Interior Lighting, Emergency Lighting, Exit Signs, Exterior Lighting.
Division 27 -	Communications, Structured Cabling, Data Communications, Voice Communications, Distributed Audio-Video Communications Systems.
Division 28 -	Electronic Safety and Security, Electronic Access Control and Intrusion Detection, Access Control, Intrusion Detection, Electronic Surveillance, Electronic Detection and Alarm.
Division 31 -	Earthwork, Earthwork Methods.
Division 32 -	Exterior Improvements, Flexible Paving, Rigid Paving, Curbs, Gutters, Sidewalks, and Driveways, Fences and Gates, Turf and Grasses.
Division 33 -	Utilities, Water Utilities, Storm Drainage Utilities, Electrical Utilities, Communications Utilities.
Division 44 -	Pollution and Waste Control Equipment, Common Work Results for Pollution and Waste Control Equipment, Air Pollution Control, Noise Pollution Control, Odor Control, Water Pollution Control Equipment, Solid Waste Control and Reuse, Waste Thermal Processing Equipment, Fluidized Bed Combustion Equipment, Rotary Kiln Incinerators, Pyrolysis Equipment, Hazardous Waste and Medical Waste Incinerators, Heat Recovery Equipment for Waste Thermal Processing, Synthesis Gas Cleanup and Handling Equipment.