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S-P TESTING, INC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (763) 497-3566 <br /> FAX (763)-497-5011 <br /> State License #394 <br /> CITY OF ORONO <br /> SEPTIC PERM ' .N ,3 V <br /> INSPEC OR , • / . <br /> July 24 2010 DTE '—/�'ERMIT NO. <br /> APPROVED AS SUBMITTED <br /> APPROVED WITH CORRECTIONS AS NOTEu <br /> NOT APPROVED-CORRECT&RESUBMIT <br /> These comments me for your information. All work shall be dues <br /> Dick Krueger is full compliance with all applicable septic and roving cute. <br /> 1 175 Willowbrook Dr. Requirements including items not specifically nuteti is this rtatdr a ORONO COPY <br /> Orono, Henn. Co., MN WITHisPLAN S1iT+Rl~iWIAlALA.TIAM4 <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 tanks &three <br /> trenches 65' long built in 1974. Soil boring #4 found mottled soil (redox features) at 38" <br /> below the ground surface &the bottom of the trenches at 34" & 36" below the ground <br /> surface. Soil boring #5 found mottled soil at 56" & the bottom of the trenches at 36" <br /> below the surface. The system does not meet a 2' separation from the bottom of the <br /> trenches & redox features & is classified as non-compliant, failing to protect the ground <br /> water. Also the lowest trench at the north end effluent is ponding 8" above the rock <br /> with black & gray soils to the surface. The black & gray color indicates that the system <br /> has surface discharged & has the potential to be an imminent threat to public health <br /> which requires an upgrade within 10 months or as determined by the City of Orono. <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 a sandy loam clay loam. The periodically saturated soils were <br /> located at 34", 42" & 68" (redox features). Due to the seasonally saturated soils, a <br /> Pressurized Mound System will need to be installed to treat septic effluent. The bottom <br /> of the rock must be located at least 3' above the saturated soils. <br /> ORONO COPY <br /> The soils at a depth of 12" have a percolation rate of 8.0 mpi. <br /> The existing tanks may be used if water tight. If new tanks are installed, the site is <br /> heavily wooded. Use Norwesco Bruiser tanks. <br /> MOS IS 11$160 POI <br /> ilDNIVAL Mt <br /> ORONO COPY <br /> 1 • ' ' r ,� <br />