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t " r . ���P TESTING� �NC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> FAX (612)-497-5011 <br /> State License#394 <br /> February 4, 1998 <br /> Alex & Cathy John�n <br /> 940 So. Brown Rd. <br /> Orono, Henn. Co., MN <br /> This site has an existing on-site sewage treatment system which is classified as failed <br /> due to not meeting a 3' separation from the bottom of the system and the saturated soil. <br /> The system was not installed in the area of the original Design completed by S-P <br /> Testing, Inc. dated September 10, 1984. Approximately 75% of the system is out of the <br /> area tested which indicated mottled soil at SB#5 at 34" below the ground surface. An <br /> addition to the house is proposed which will require the system to be upgraded. <br /> Soil borings completed in the area of#1, 2 & 3 found the mottled soil changed & at a <br /> higher elevation than in 1984. This may be caused by the sandy soils in the soil profile <br /> being saturated during a very wet period in the late 1980's. <br /> This on-site sewage treatment system is designed for a Type 1, 5 bedroom home & 1 <br /> bedroom guest house in the bam totaling 6 bedrooms, in accordance with the Minnesota <br /> Pollution Control Agency Chapter 7080 and tocal ordinances. <br /> The soils on this site are SCS soils mapped - HbC - Hayden loam. The seasonally <br /> saturated soils were located at 28" to 60" (mottled soil). Due to the seasonally saturated <br /> soils, a Pressurized Mound System will need to be installed to treat septic effluent. The <br /> bottom of the treatment area must be located at least 3' above the saturated soils. <br /> The soils at a depth of 12" have a percolation rate averaging 12.6 mpi. <br /> 1 <br />