12VAC5-610-800: Aerobic biological systems

Aerobic biological treatment systems will be considered on a case-by-case basis at the request of the owner. These systems shall meet the applicable criteria contained in 12VAC5-640-360 of the Alternative Discharging Sewage Treatment Regulations for Individual Single Family Dwellings or 12VAC5-580-770 of the Sewerage Regulations (12VAC5-580-10 et seq.) or criteria developed by a testing laboratory or agency approved by the division. Where an activated sludge process is used to produce a secondary effluent, provisions shall be made to protect the drainfield from bulking solids. Use of an aerobic pretreatment system shall not result in the reduction of the absorption area requirements contained in Article 5 (12VAC5-610 900 et seq.) of this chapter.