If the flow is greater than 801 GPD for a non-residence sand filter, what is required?

When the flow exceeds 801 gallons per day (GPD) for a non-residential sand filter, a dosing system is required to manage the increased volume of wastewater effectively. Dosing systems are designed to intermittently pump wastewater through the sand filter at appropriate rates, ensuring that the filter can handle the load without being overwhelmed. This controlled method allows for improved distribution across the sand media, enhancing treatment efficiency and preventing issues like system saturation or bypassing of contaminants.

The necessity for a dosing system stems from the need to maintain the operational integrity of the treatment process, especially in non-residential applications where wastewater volumes may fluctuate significantly. Proper dosing is critical to achieving adequate treatment standards and protecting public health and the environment.