Which method of discharge is NOT allowed for Class II effluent from aerobic systems?

The method of discharge that is not allowed for Class II effluent from aerobic systems is surface discharge. Class II effluent typically refers to wastewater that has been treated to a level that allows it to be used for certain non-potable applications, but still requires specific handling to ensure public health and environmental safety.

Surface discharge involves releasing effluent directly onto the surface of the ground or into bodies of water, which poses significant risks of contamination to groundwater and natural water bodies. This method can lead to pollution and health hazards, especially in areas where water sources are in close proximity to human activity.

In contrast, subsurface seepage systems and sand filters are designed to further treat or manage effluent below the surface, reducing the risk of contamination and allowing for safer absorption into the soil. These methods utilize natural filtration processes, making them compliant with regulations and suitable for the discharge of Class II effluent.