Gravity Thickener Tank Repair

The Work is located in Little Ferry, New Jersey at the Bergen County Utilities Authority Little Ferry Water Pollution Control Facility (BCUA LFWPCF) near the intersection of Empire Blvd. and Mehrhof Road. B. The Work to be performed under Contract No. C218 Gravity Thickener Tank Repair includes, furnishing all labor, materials, equipment and incidentals required to complete the cleaning, repair, and protective coating of the gravity thickener tanks and the mixing tank in their entirety as shown on the Contract Documents and as specified herein.. C. This project consists of the rehabilitation of the four (4) existing gravity thickener tanks and the mixing tank at the Little Ferry Water Pollution Control Facility. The Work includes removal and disposal of accumulated sludge, debris, and residual materials; temporary containment and protection; abatement, handling, transportation, and disposal of hazardous materials; substrate surface preparation; structural repair of steel tank surfaces and effluent launder channels; replacement of effluent weir systems; and application of steel and concrete protective coating systems. D. The Work shall be performed over two (2) construction seasons as established in the Bid Schedule of Prices and described in Section 01 22 13 - Measurement and Payment. The Work included in each construction season is summarized below. 1. 2026 Construction Season Gravity Thickener Tanks No. 3 and No. 4: a. Cleaning, temporary protection and containment, hazardous material abatement, substrate surface preparation, and inspection support. b. Demolition and disposal of the existing influent pipe wall penetrations, and furnishing and installation of new influent pipe wall sleeves. c. Repair and restoration of the effluent launder channels utilizing the specified Carbon Fiber Reinforced Polymer (CFRP) Restoration System. d. Demolition and disposal of the existing effluent weir systems, and furnishing, installation, and adjustment of new fiberglass-reinforced plastic (FRP) effluent weir systems. e. Furnishing and application of the protective coating systems, including treatment of steel surfaces exhibiting Corrosion Type A. 2. 2027 Construction Season Gravity Thickener Tanks No. 1 and No. 2: a. Cleaning, temporary protection and containment, hazardous material abatement, surface preparation, and inspection support. b. Repair and restoration of the effluent launder channels utilizing the specified Carbon Fiber Reinforced Polymer (CFRP) Restoration System. c. Demolition and disposal of the existing effluent weir systems, and furnishing, installation, and adjustment of new fiberglass-reinforced plastic (FRP) effluent weir systems. d. Furnishing and application of the protective coating systems, including treatment of steel surfaces exhibiting Corrosion Type A. 3. 2027 Construction Season Mixing Tank: a. Cleaning, temporary protection and containment, hazardous material abatement, surface preparation, steel repair and restoration utilizing the specified Carbon Fiber Reinforced Polymer (CFRP) Restoration System, and application of the protective coating system. E. Repair of existing steel tank surfaces exhibiting Corrosion Type B and Corrosion Type C is provided as Unit Price Work. Quantities will be established following completion of tank cleaning and surface preparation, as specified in Section 01 22 13 - Measurement and Payment. F. An allowance has been established for the remediation of unforeseen hazardous materials that may be encountered during the Work and that were not identified in the Contract Documents, as specified in Section 01 22 13 - Measurement and Payment G. Contracting Method: The Project shall be constructed under one prime Contract. H. Hazardous Environmental Conditions: 1. The site has been a Water Pollution Control Facility since 1951. Today, the Water Pollution Control system serves a population of about 536,000 in 47 municipalities and its present peak monthly design capacity of 109 million gallons per day (mgd). 2. Division 02 describes environmental materials and conditions that may be encountered during the execution of the Work. I. Datum Plane 1. All elevations indicated or specified are in feet and refer to the datum plane of NAVD 88. 2. All horizontal locations indicated or specified refer to datum plane of NAD 83.