To safely and efficiently reclaim the community’s used water for the protection of human health and preservation of aquatic life.
|Major Construction Milestones||Completed||Cost|
|8.2 MGD Pure Oxygen AWT facility (to meet requirements of Clean Water Act)||July, 1986||$22 million|
|Upgrade & Expansion to 12.5 MGD||1992 - 1994||$27.1 million|
The Long Cane Plant provides advanced wastewater treatment. It has influent coarse and fine screening; grit removal; primary clarification with ferric chloride addition for phosphorus removal. Flow is then split between two biological treatment plants - a 7.5 MGD Pure Oxygen and a 5.0 MGD Carrousel each with its own secondary clarifiers, effluent filters, and chlorination. The total discharge is then de chlorinated and pumped 11 miles to the Chattahoochee River at the confluence of Long Cane Creek. There it is aerated and diffused under the river. Sludge handling consists of thickening, belt filter presses, and lime stabilization.
|Parameter||Monthly Avg||Weekly Avg|
|NH3 - N (mg/l)||2||3|
|FECAL COLIF (#/100 ml)||200||400|
|D.O. (mg/l)||6.0 (daily minimum)|
|pH (pHU)||6.0 (daily minimum)|
|TRC (mg/l)||0.39 (daily maximum)|
Two daily violations in the last sixty-eight months.
The local program was approved by GA EPD in 1982 and implemented in 1984. The City of LaGrange WPC is the Control Authority with oversight by EPD and EPA. 21 Significant Industrial Users are issued Discharge Permits with effluent limits, monitoring, and reporting requirements.
The annual operating budget for the WPC division is $2.83 million with 22 employees. Energy conservation features include peak-shaving generators; treated water reuse; and interruptible gas capabilities.