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�' - <br /> ���" ��'ESTING, INC. Steven B. Schirmers — MPCA Cert. No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> ��� ���� ��� December 10 , 19 9 3 <br /> �� <br /> Coffin Site <br /> Lot l , Block 1 <br /> Orono , Henn. Co. , MN <br /> This On-Site Sewaye Treatmer�t System is Designed for a lype 1 , five <br /> bedroom home in accordance with the Minnesota Pollution Control <br /> Agency Chapter 7080 anc] local ordinances . <br /> The soils on this site are SCS soils mapped - LsC2 - Lester clay <br /> loam. A seasor�aliy t�iyr. water tabl� was located at 16" to 34" <br /> (mottled soil ) . Due to the seasonally high water table, a <br /> Pressurized Mound System will need to be installed. The bottom <br /> of the rock beu musL be located at ieast 3 ' above the seasonally <br /> high water table . <br /> The soils at a depth of 12 " llave d percolation rate av�raging <br /> 14 . 1 min/inch . <br /> A pumping chamber will need to be installed to lift t;ze effluent <br /> to the treatment area . <br /> The manifold and supply line pipe must have back drainage to the pumping <br /> chamber. The distribution pipes shall have their ends capped . Be sure <br /> the rock and sand fill material are clean. The sod layer below the <br /> entire mounded area must be turned over , just break up the sod, be sure <br /> not to over work. <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 witYi a liglit and sound device , this is in case of a pump <br /> failure . Mercury floats are a good method . <br /> All neighboring wells are located greater than 100 ' away from the <br /> proposed treatment area . <br /> CONT ' D <br />