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• <br /> S-P TESTING, INC. Steven B. Schirmers — MPCA Cert. No. 627 <br /> 951 Katydid Lane NE • St. Michael, 95326-• (612)-4971 566 <br /> August 19 , 1993 <br /> John Fre- a J %1:2-r14. <br /> 4605 Watertown Rd. AUG 2 3 1993 <br /> Orono, Henn . Co. , MN <br /> This site has an existing failing On-Site Sewage Treatment System <br /> with effluent discharging to the surface. Mr. Serena purchased <br /> the property in Jan. 93 and was not informed that the system was <br /> in trouble . After the snow melt, an area north of the house <br /> was discharging effluent to the surface . The area is black with <br /> no grass cover in the center of the lawn. This indicates the <br /> system has been failing for a long period of time, several months <br /> to several years . Surface discharge is not legal and requires <br /> the system to be replaced . <br /> This On-Site Sewage Treatment System is Designed for a Type 1, four <br /> bedroom home in accordance with the Minnesota Pollution Control <br /> Agency Chapter 7080 and local ordinances . <br /> The soils on this site are SCS soils mapped - L+B - LeSueur loam. <br /> A seasonally high water table was located at 22" to 26" , (mottled <br /> soil ) . Due to the seasonally high water table , a Pressurized <br /> Mound System will need to be installed . The bottom of the rock <br /> bed must be located at least 3 ' above the seasonally high water <br /> table. <br /> The soils at a depth of 12" have a percolation rate averaging <br /> 10 . 2 min/inch. <br /> A pumping chamber will need to be installed to lift the 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 /> CONT' D <br />