Greater than 60% THM reduction observed
Topics: clearwell, certified tests, chlorine, trihalomethane reduction, stratification
Water flows in series through Clearwell #1 to # 2, then onto distribution.
Tank / Reservoir Build Information:
- Tank Type: Two (2) Identical, Cylindrical, Steel GST
- Tank Size (Gallons): 300,000
- Height (ft.): 16.75
- Diameter (ft.): 58
- Roof Type: Flat
- Baffles: Tanks are divided into four (4) sections.
Disinfectant Type: Chlorine
Conditions: The community conducted a distribution system evaluation for total trihalomethanes (TTHMs).
Concentrations at several locations exceeded the maximum contaminant level of 80 ppb as required by EPA Stage 2 DBPR.
Objectives: To lower their TTHMs to be in compliance with EPA.
Solution: Clearwell #1 & # 2: One (1) Large Frame SN Series THM Removal System
Results: The community has conducted certified lab tests during the peak THM season. Results show consistent THM reduction of 60% or more. (See chart below for certified lab test results). The community is pleased with the ongoing results in THM reduction, and is happy with Medora Corporation's service and support as well.