True or False: A buried sand filter must have a surface area of 2 gallons per square foot per day and can be dosed up to four times per day following an aerobic treatment plant.

The statement is true because a buried sand filter is designed to provide effective treatment of effluent from an aerobic treatment plant. The requirement for a surface area of 2 gallons per square foot per day is based on the hydraulic loading rates that ensure adequate filtration and treatment of the wastewater. This specification helps to maintain proper moisture levels in the sand filter, promoting the growth of microorganisms essential for breaking down pollutants.

Additionally, the capacity to dose the system up to four times per day allows for better management of effluent distribution and prevents overloading the filter at any one time. This dosing frequency helps maintain aerobic conditions within the filter, improving treatment efficiency. Both of these parameters are crucial in the context of septic systems and illustrate standard practices in wastewater management using aerobic treatment systems followed by sand filtration.