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480 Orchard Park Rd. <br /> Orono <br />• <br /> (2) <br /> The soils on this site are SCS soils mapped - LmB - Lerdal loam. <br /> The proposed At Grade System has an existing trench below the <br /> treatment area . The existing trench must be broken up at the <br /> down slope toe of the system. <br /> The soils at a depth of 12" have a percolation rate averaging <br /> 3 .2 min/inch. <br /> A pumping chamber will need to be installed to lift the effluent <br /> to the treatment area. <br /> The power supply and switches must be located outside the manhole and <br /> pumping chamber in a weather proof enclosure. A warning device must <br /> be installed with a light and sound device, this is in case of a pump <br /> failure. Mercury floats are a good method. <br /> , An existing lift pump in the lower level will need to be replaced <br /> due to to a metal basket being rusted. A pipe outlets the basket <br /> which will need to be capped off. This pipe may flow to the existing . <br /> tanks east of the house . Recommend to varify no water flows from a <br />• sink or toilet before capping off. <br /> All neighboring wells are located greater than 100 ' away from the <br /> • proposed treatment area. <br /> -- Keep all heavy equipment off of the proposed treatment area before and <br /> after construction. The treatment area should be marked off before <br /> construction. This Design is not valid & the System will need to <br /> 'be relocated if failure to protect the.-areas proposed for On-Site ---~ <br /> Sewage Treatment occurs . <br /> ..With proper installation and maintenance, this system should have no <br /> in treating septic effluent effectively. <br />