NACA Wastewater Treatment Plant Improvements

The project is generally described as follows: The improvements generally include increasing the average daily treatment capacity from 3.6 million gallons per day (MGD) to 7.2 MGD (including peak flows of 18 MGD), expanding the influent pump station, new primary clarifier, additional screening and grit removal, new mixing and splitter box, additional process trains, new final clarifier splitter box, additional final clarifiers, expanded return sludge pumping station, additional chemical storage, additional filtration, additional ultraviolet disinfection, Class B solids improvements with new aerobic digesters, additional dewatering within the existing dewatering building, new maintenance facility, and new backup power generation. Pre-Qualification - Yes The completed Work will provide Owner with various wastewater treatment plant improvements. More specifically, the Project includes, but is not limited to, construction of the following: 1. The expansion from 3.6 MGD to 7.2 MGD will require expansions of almost every facility at the NACA WWTP. The 7.2 MGD expansion improvements include: a. Influent Pump Station: 1). Construct a new splitter box structure upstream of the influent pump station. 2). Construct a new add-on wet well to include two additional identical pumps. 3). Install one additional pump in the existing empty bay. b. Screening Facility: 1). Install a new identical mechanical continuous belt screen in the existing manual bar screen channel. 2). Relocate manual bar screen to a fourth channel constructed outside the building. 3). Install a new magnetic flow meter for influent flow measurement in the yard. c. Grit Removal System: 1). Construct two additional 6.8 MGD vortex grit chambers 2). Replace the existing grit classifier with a new four-cyclone grit classifier capable of receiving and classifying grit slurry from 4 grit pumps. The new grit classifier will receive grit flow from four (2 existing + 2 new) grit chambers. d. Primary Treatment: 1). Construct one 96-ft circular primary clarifier. e. Process Train: 1). Construct a new splitter box to distribute flow evenly between four process trains (two existing + two new). 2). Construct two additional process trains with turbine aerators to mirror the existing process trains. f. Alum Storage and Feed: 1). Demolish existing 6,000-gal storage tanks. 2). Construct two new heat-traced outdoor storage tanks. 3). Install new metering feed skids. g. Secondary Clarifiers: 1). Construct a new splitter box to distribute flow evenly between four secondary clarifiers (two existing + two new clarifiers). 2). Construct two new 80-ft diameter circular secondary clarifiers. h. RAS/WAS Pump Station: 1). Add a fourth influent bay to the existing wet well. 2). Add a third 5.4 MGD return activated sludge (RAS) pump. i. Filtration Expansion: 1). Construct a new filtration structure including a. Coagulation/flocculation basins b. Cloth media disk filters 2). Install three new cloth media disk filter systems together with backwash pumps and piping.

Sewage Treatment Plant, Renovation, Lift and Pump Stations, Renovation.

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, Toilet, Bath, and Laundry Accessories, Emergency Aid Specialties, Fire Protection Specialties, Fire Extinguishers, Storage Specialties, Storage Assemblies.
Division 11 -	Equipment, Laboratory Equipment.
Division 12 -	Furnishings.
Division 14 -	Conveying Equipment, Scaffolding.
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, Audio-Video Systems, 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, Common Work Results for Utilities, Water Utilities, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wastewater Utility Pumping Stations, Sanitary Utility Sewerage Force Mains, Storm Drainage Utilities, Electrical Utilities, Communications Utilities.
Division 40 -	Process Integration, Water Process Piping.
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.
Division 45 -	Industry-Specific Manufacturing Equipment.
Division 46 -	Water and Wastewater Equipment.