Nine-dwelling development with one (1) 500 gallon pre-treatment tank per unit. Each three tanks feed one 750 gallons per day aerobic treatment unit, for a total of three (3) systems.
 Three 750 gallon-per-day. treatment units, each with a 1600 gallon effluent tank for final distribution.
[2-3] Terrain was grade cut to assure proper drainage away from the dwellings.
[4-5] A 500 gal. pre-treatment septic tank. One for each dwelling.
 One of the three sets described in photo # 1.