A conventional water treatment process is to provide EPA required Virus inactivation for a water at a temperature of 15 °C and pH of 7. The contact chamber has a hydraulic residence time of 40 minutes...

Extracted text: A conventional water treatment process is to provide EPA required Virus inactivation for a water at a temperature of 15 °C and pH of 7. The contact chamber has a hydraulic residence time of 40 minutes with an average baffling condition. The travel time in the pipe is 10 minutes before the first customer. The required chlorine concentration is most nearly? O 0.32 mg/L O 4 mg/L O 0.16 mg/L O 0.1 mg/L