The upgrades included an entirely new treatment process – two new sequencing batch reactor systems including mixers, decanters, pumps, diffusers, controls, instrumentation, post equalization tanks and aerobic digester tanks. A new fine screen and sampler were installed in the Headworks Building. The influent raw wastewater pumps and controls (including sluice gates, flow metering and plant water system) were replaced. A new Vortex Grit Removal System was added as well as a new Chemical Building. The existing chlorine contact tank was renovated, and three new Sludge Drying Beds were constructed.
Construction activities included all sitework, excavation, underground piping, cast in place concrete tanks, treatment equipment, process piping, all architectural trades, instrumentation and controls.
Quandel was the prime contractor with responsibility to coordinate the Electrical Contractor and the HVAC/Plumbing Contractor, in addition to all of its own subcontractors and in-house work force.
The largest challenge was that the existing treatment system had to remain in operation continuously throughout construction.