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� !� <br /> �-P TES T/NG INC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> � <br /> . 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> FAX (612)-497-5011 <br /> State License#394 <br /> February 13, 1998 <br /> Mary Stevenson <br /> 205 Hollander Rd. <br /> Orono, Henn. Co., MN <br /> A Compliance Inspection was completed for the existing on-site sewage treatment <br /> system located on this property. The system consists of 2-1000 gallon holding tanks, 1- <br /> 1000 gallon pump chamber and 4-100' long trenches = 1200sq.ft. The system was built <br /> in 1987. Soil borings into the system found the top of the rock at 6" to 14" below the <br /> ground surface with the bottom of the rock at 24" to 32" below the ground surface. Four <br /> soil borings, #4,5,6 & 7 completed in the area of the existing system found mottled soil <br /> (highest known saturated layer of soil) at 30", 36" 8�44" below the ground surface. State <br /> and local code requires a 2" separation (not in shoreland district) from the bottom of the <br /> system and the saturated soil to be in compliance. The existing system is classified as <br /> failed, non-compliance due to not meeting the required separation from the saturated <br /> soil. The City of Orono will require the system to be upgraded in 10 years, unless an <br /> imminent health hazard occurs which is surFace discharging, badcing into the home or <br /> the 1 st tank not being water tight. The tanks must be verified water tight by a licensed <br /> pumper or the City Inspector. <br /> This on-site sewage treatment system is designed for a Type 1, four bedroom home, in <br /> accordance with the Minnesota Pollution Control Agency Chapter 7080 and local <br /> ordinances. <br /> The soils on this site are SCS soils mapped - HbC - Hayden loam. The seasonally <br /> saturated soils were located at 24" to 34" (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 /> Approval will be needed for the upslope toe of the mound to be 10' from the north <br /> property line due to the limited space available. The absorption area will be 20' from the <br /> property line. Also the slope is 7%, the city requires a maximum of 6%. <br /> 1 <br />