2006-P10164 - septic - Laserfiche WebLink

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, The results of the soil analysis and percolation tests indicate that the site can support a standard ' subsurface drain field at the proposed area depicted on Figure 1 and 2. A soil sizing factor of 2.2 square feet per gallon per day has been selected. � Sizin� of Treatment S sy tem — The OWS is designed for a four-bedroom home with a garbage disposal. The estimated daily flow for a four-bedroom home is 600 gallons. Sink and toilet fixtures need to be � monitored closely to ensure proper operation. A leaking facet or toilets can more than double the daily flow to the OWS and cause hydraulic failure. Descrivtion of the Treatment Process— � • Primary Treatment - Sewage is gravity discharged from the house to a septic tank. Natural � biological activities taking place inside of the septic tank will separate solids and suspended particles. Solids are reduced to some extent through this process. • Secondary Treatment— Effluent from the clear zone of the se tic tank flow ' p s to a lift chamber and is filtered prior to discharge. Suspended particles larger than 1/8" are filtered out by the effluent filter. Final Treatment— Effluent is um ed to a new drain fi � � P p eld. As the effluent trickles down into the soil biochemical processes remove harmful viruses and bacteria. Descri tion of Treatment S stem— See fi re and d � � p v ( gu esign sheets for additional detail.) • Septic Tank — 2,000 gallon two compartment Belle Plaine Block and Tile concrete septic tank. � Install septic tank per manufacturer's recommendations. • Lift Tank — 1,000 gallon single compartment Belle Plaine Block and Tile concrete septic tank � (see Appendix B for detail). • Septic/Lift Tank Risers — 24" diameter heavy corrugated PVC pipe. A watertight seal must be � created between top of tank and the each riser. • Septic/Lift Tank Riser Cover — 24" diameter fiberglass cover with gasket. Tank riser covers � should include insulation. Do not bury riser cover. • Pump System — Screened vault effluent pump system to deliver a minimum 20 gallons per � minute with a total head of 20 feet. Install a schedule 40 PVC discharge pipe to pump and extend discharge pipe through riser wall. Install a camlock on the discharge pipe between pump and the riser � for easy disconnect. Drill a 3/16" weep hole at the invert of the 90 degree bend in the discharge pipe to allow drain back. Install all high-pressure fittings. • Drain Field — Excavate the drain field trenches as depicted on Fi re 2. De th of excavation � � P shall be 2 — 2.5 feet on the uphill side and level. Place High Capacity Infiltrator�Gravelless Chambers in the trench bottom connected by gravity drop boxes. The pump will discharge to the first drop box. ' Back fill with native soil and seed for cover. 2 � '