Georgia Septic Installer Practice Test

In the absence of actual flow data, how many gallons will be set aside per room per day for an ATU unit?

1. 100 gallons

2. 125 gallons

3. 150 gallons

4. 200 gallons

The correct answer is: 150 gallons

For an Aerobic Treatment Unit (ATU), the design and sizing typically consider the average wastewater produced per person or room. In the absence of actual flow data, the standard estimation for daily wastewater flow per room is crucial for ensuring the ATU can effectively handle and treat the waste. Setting aside 150 gallons per day per room accounts for a variety of factors, including typical household usage patterns, peak flow periods, and the necessary buffering capacity for the system. This volume is designed to ensure the ATU can function properly without being overwhelmed, effectively treating wastewater while maintaining adequate treatment times and aerobic conditions in the unit. Choosing 150 gallons accurately reflects an industry-recognized approximation that balances efficiency with potential variances in usage, helping to ensure compliance with health and environmental standards regarding wastewater management.