For flows greater than 1350 gallons per day, what is the proper method for sizing tanks?

When flows exceed 1350 gallons per day, the appropriate method for sizing tanks is to install additional tanks in series or use multiple compartment tanks. This approach is beneficial because it allows for better treatment of wastewater, managing larger volumes more effectively than a single large tank could.

Using multiple tanks can enhance the treatment process by providing stages for sedimentation and biological treatment, which is necessary when dealing with high flow rates. In series, these tanks work together, allowing gravity flow and reducing the risk of overloading any single unit.

Furthermore, multiple compartments within a single tank can help with the separation of different phases of treatment, facilitating enhanced microbial activity and better solids settling. This method also improves overall system efficiency and ensures compliance with regulatory standards, which often specify certain treatment capabilities based on flow rates.

Other strategies, such as converting to a lagoon system, could shift the treatment methodology entirely, while using tank sizes only up to 1000 gallons would not accommodate the increased flow, risking system failure or environmental harm. A single large tank may not provide the necessary treatment capacity and could lead to ineffective waste management. Hence, utilizing additional tanks in series or multiple compartments is the most effective and compliant solution for handling high daily flows in septic systems.