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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. • Final Treatment -Effluent is pumped to a new 792 square foot drain field. As the effluent trickles down into the soil biochemical processes remove harmful viruses and bacteria. Description of Treatment System -(See figures, design sheets, and data sheets for additional detail.) • Septic Tank -(2) 1,000 gallon fiberglass septic tanks. Second tank is a combination 1,000 gallon septic and 500 gallon pump chamber. Install septic tank per manufacturer's recommendations. • Pump Tank -500 gallon second compartment of a 1,500 gallon two compartment fiberglass septic tank. Install septic tank per manufacturer's recommendations. • Septic Tank Risers -24" diameter heavy corrugated PVC pipe. A watertight seal must be created between top of tank and the each riser. • Septic Tank Riser Cover -24" diameter fiberglass cover with gasket. Tank riser covers should include insulation. Do not bury riser cover. • Pump -Effluent pump to be selected to deliver a minimum of 20 gallons per minute with 10 feet of head to first drop box through 2" schedule 40 PVC pipe. • Drain Field -Excavate the drain field trenches as depicted on Figure 2 when the soil is less than the plastic limit to prevent smearing and compacting. Installer is responsible for determining if the soil is below the plastic limit prior to excavation. Depth of excavation shall be 1.5 feet on the downhill side of trench, scarified and leveled. Place Quick4 High Capacity Infiltrator® Gravelless Chambers in the trench bottom connected by gravity drop boxes. • Grading -Back fill with native soil, seed for cover, and mulch for erosion control ASAP after installation. Create positive drainage away from the septic tank and drain field, allow for soil settling. Do not allow channeled runoff over the drain field; create drainage swales along the outer edges of the drain field to prevent excess runoff on the drain field. Limitations -Our investigation, layout, design, and recommendations are based on data submitted. If conditions considerably different from those described in this report are encountered, we must be notified. If proposed construction is changed, we must be notified to evaluate the effect of the changes on the wastewater system. Any changes to the design must be approved by the designer and will be assessed additional design costs. If changes are made to the design without the knowledge and approval of the designer the design shall be void. All construction is to be in accordance with the ISTS regulations. Pipe type and size, installation requirements, septic tank construction, and other 2