2003-P06845 - new septic system - Laserfiche WebLink

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� . , The landscape position, soil parent material, elevation above lrnown water table and the results of the soil investigarion dictate that the site can support a standard subsurface drain field. The results of soil structure analysis and soil texture analysis lead to the selection of a soil sizing factor for this type of soil of 2.20 square feet per gallon. 4. Sizin�of Treatment System — The OWS is designed for a two-bedroom home. The estimated daily flow for a two-bedroom home is 300 gallons. Sink and toilet fixtures need to be monitored closely to ensure proper operation. A leaking facet or toilets can more t�an double the daily flow to the OWS and cause hydraulic failure. 5. Description 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 septic tank flows into a lift tank. Inside of the lift tank will be installed an Orenco Systems, Inc. Biotube�pump vault and modified well pump. Suspended particles larger than 1/8"are filter out by the Biotube�pump vault. • Final Treatment—Eftluent is pumped to a new drain field As the ef�luent trickles down into the soil biochemical processes remove harmful viruses and bacteria 6. Description of Treatment System—(See figure,design sheets and data sheets for additional detail.) • Septic/Lift Tank— 1,500 gallon two compartmeat fiberglass septic tank, First compartment, 1,000 gallons, to be used as septic tank. Second compartment, 500 gallons, to be used as lift compartment Proposed tank; Xe�es� Corporation RST II Fiberglass Septic Tank. Tank will be ordered without an outlet and with a compartment bai�le. Inlet of the tank must have cast in place rubber fittings to create watertight seals. Top of risers sha11 be 3" above finished grade to avoid runoff from entering through the top of riser. Sep�ic tanks should be pumped at a minimum of every three years. • Septic/Lift Tank Risers — 24" diameter heavy corrugated PVC pipe. A watertight seal must be created between top of tank and the each riser. Top of riser should be 1"-3"above finished grade. • Septic/Lift Tank R.iser Cover — 24" diameter fiberglass cover with gasket, Orenco Systems, Inc. model#FL24G or equivalent. Lift tank riser cover should include insulation. Do not bury riser cover. • Screened Pump Vault — Orenco Systems, Inc. model #PW57-1819 pump vault in the lift tank through the maintenance hole (see figure in Appendix D). Orenco Systems, Inc. modified well pump model # P200511, 115V, '/= hp, (or equivalent) in the flow inducer of the pump vaul� Connect 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. - 2