Davis & Floyd worked with SCDHEC to establish discharge limits for the expanded facility and assisted the County in negotiating more favorable phosphorous limits for the WWTP. The project involved evaluating various wastewater treatment systems and configurations and found that installation of a SBR treatment system with continued use of the aerated lagoon for emergency wastewater storage was the most cost-effective alternative. The original WWTP construction included headworks with screening and vortex grit removal, SBR biological treatment with BNR capability, chlorine disinfection, and sludge digestion. Subsequent projects at the facility have included the emergency storage basin, septage receiving station, and lab facility. Additionally, we administered the County’s pretreatment program.