Atch-01 PWS Attachment 8.3. Short Stay Wastewater Treatment Plant Site Layout Drawings and Photos.pdf

This document is a technical overview and site documentation for the Joint Base Charleston Short Stay (JB CHS-SS) Wastewater Treatment Plant (WWTP) located at Joint Base Charleston in South Carolina. The facility treats sanitary sewer influent from base operations and discharges treated effluent to Lake Moultrie. The WWTP employs a multi-stage treatment process consisting of preliminary treatment (barscreen), primary treatment (clarifiers), secondary biological treatment (two aeration basins with surge tank), tertiary filtration, and chlorination/dechlorination disinfection. Raw sanitary sewer enters through a 10-inch pipe to a wetwell and valve vault, then flows through two clarifiers and two aeration basins where blowers provide oxygen for microbial treatment. The treated wastewater then passes through an equalization weir, tertiary filter, and chlorination/dechlorination contact chamber before final discharge through an outlet pipe to Lake Moultrie.

The documentation includes site layout maps, process flow diagrams with color-coded flow lines (green for raw influent, purple for process wastewater, blue for treated effluent), and multiple site photographs showing the treatment basins, clarifiers, aeration equipment, chlorination and dechlorination chambers, and effluent sampling and holding infrastructure. Key components visible at the facility include a surge tank/aeration basin number one, aeration basin number two, two clarifiers, an equalization weir, a tertiary filter, a chlorination and dechlorination contact chamber, and supporting infrastructure including an office/storage building, wetwell, valve vault, and temporary effluent holding tank. The facility demonstrates active operations with water quality monitoring and sample collection procedures in place.