Sussex Shores WTP No. 1 Pretreatment Improvements

Key Accomplishments

• Removed the existing flocculation tank and hydropneumatic tank, including associated equipment, concrete bases and supports, and repaired affected building wall openings and surrounding areas.
• JCC coordinated the temporary removal and storage of the existing slat-tray aerators to permit installation of the new aerator discharge piping and pretreatment equipment.
• Replaced the aerator inlet piping and installed the new aerator discharge piping system, including fittings, supports, insulation and heat tracing.
• Installed a new 10-inch in-line mechanical flash mixer and the associated mechanical, electrical and instrumentation components required to integrate the mixer into the treatment process.
• The in-line mixer was designed around an ANCO Series 5000 or approved equal, with Type 316 stainless-steel submerged components, dual counter-acting axial impellers and a minimum ¾ HP drive motor.
• JCC integrated the new in-line mixer with the aeration process controls, with the mixer interlocked to operate whenever the slat-tray aeration blowers were operating.
• Installed new chemical-feed piping for sodium hypochlorite, hydrated lime and polyaluminum-blend treatment chemicals, together with associated support systems and pipe insulation.
• Coordinated chemical piping using corrosion-resistant PVC/CPVC systems, valves and accessories suitable for the applicable chemical service.
• JCC performed the High Service Pump upgrades, including removal of existing pump piping, valves and fittings and reconfiguration of the existing pumping arrangement.
• Removed High Service Pump No. 1 and its existing direct drive, including demolition of the associated pump base and repair of the existing concrete floor.
• Relocated High Service Pump No. 4 to the former Pump No. 1 position and constructed the required new concrete pump pad.
• Removed the existing Pump No. 3 installation and installed a new High Service Pump No. 3, complete with a new concrete equipment foundation and associated piping connections.