Question

Design the seepage pit for a septic tank using four ft diameter circular concrete pits. Assume groundwater is 20 feet below the surface and with silty soils. The expected design flow is 400 gallons per day. The perc test gave a percolation rate of 12 gallons per day per ft^2. Determine the depth of installation, the length of the concrete pit, and the number of pits.

Answer 1