Artesian Wilmington Airport Water Treatment Plant Renovation

Key Accomplishments

Johnston Construction Company

• Installed the new CUF treatment unit within the Filter Building and completed the required connections between the new treatment equipment and the existing raw-water and filtered-water systems.
• Made a new connection to the existing raw-water line entering the Filter Building and installed new raw-water piping within the existing pipe trench.
• Installed new grating over the existing Filter Building piping trench to provide safe access around the renovated process system.
• Connected the new treatment process to the facility's existing filtered-water discharge line, integrating the new iron-removal equipment into the operating water-treatment system.
• Furnished and installed process piping, valves, fittings, hangers, supports and associated appurtenances serving raw water, finished water, process, drain and instrumentation systems. The process-piping specifications required installation, testing and disinfection of the completed piping systems.
• Installed new hypochlorite storage, venting and chemical-injection systems within the Filter Building.
• Installed a new hypochlorite tank in the Chlorine Room, together with new chemical pumps, chemical-feed piping and a new disinfectant injection connection to the filtered-water system.
• Provided spill containment for the chemical-storage installation and installed new double doors serving the renovated Chlorine Room.
• Installed new fluoride storage, venting and injection systems as part of the facility's upgraded chemical-feed operations.
• Installed new phosphate storage, venting and injection systems within the Pump Building, expanding and modernizing the facility's chemical-treatment capabilities.
• Installed new water-quality analyzers with associated feed and drain piping and integrated analyzer signals into the plant's SCADA system.
• Installed pressure instrumentation including a pressure transducer on the Filter Building discharge piping and an additional pressure transducer downstream of the existing service pumps.

B & R Electrical Contractors

• Served as the electrical subcontractor to Johnston Construction Company for the Wilmington Airport Water Treatment Plant renovation, providing the electrical work associated with installation of new iron-removal treatment equipment and supporting process systems.
• Furnished the labor, materials, tools, equipment and supervision required to execute the electrical portion of the treatment-plant renovation.
• Completed major electrical-service modifications at the Pump Building as part of the facility's power-distribution improvements.
• Furnished and installed a new 600-amp main non-fused disconnect serving the upgraded electrical system.
• Furnished and installed a new 600-amp I-LINE panelboard with transient-voltage-surge-suppression provisions and associated circuit protection.
• Installed an additional lighting/power panelboard for the renovated facility electrical loads.
• Furnished and installed electrical disconnect switches serving the air compressor, existing electric unit heaters and other mechanical/process equipment.
• Rearranged the existing electrical service so that the renovated distribution system could support the existing motor-control center and new electrical equipment required for the water-treatment improvements.
• Furnished and installed new conduit and conductors throughout the project as required for new treatment equipment, instrumentation, lighting, receptacles and control systems.
• Provided electrical connections for the new 75-horsepower treatment-unit motor, integrating the new iron-removal process equipment into the plant electrical system.
• Connected process instrumentation including level transducers/transmitters, chemical-feed pumps, fluorine analyzer, chlorine analyzer and flow meter.
• Furnished and installed the electrical and control wiring necessary for the process analyzers to communicate with the plant's SCADA system.
• Provided electrical connections and control wiring for the new treatment equipment in accordance with the project's Division 16 requirements.
• Installed new lighting, switches and receptacles in the Filter Building as part of the facility renovation.