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v <br /> 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 /> IS SYSTEM IS DESIGNED FOR State License #394 <br /> BEDROOMS. ANY INCREASE 1N NUMBER <br /> OF BEDROOMS INVAUDATES THIS DESIGN. <br /> CITY OF ORONO <br /> September 27, 2004 SEPTICSERMi PAN REVIEW <br /> INSPECTOR." " <br /> DATE lo-lc1-O`i PERMIT NO. _ <br /> APPROVED AS SUBMITTED <br /> APPROVED WITH CORRECTIONS AS NOTED <br /> John VanDyck NOT APPROVED-CORRECT&RESUBMIT <br /> 2550 Woodhaven Dr. These comments arc for your information. All work shall be dote <br /> in full compliance with alt applicable septic and zoning code. <br /> Orono, Henn. Co., MN Requirements including items not speciticully noted in thiarevaiw. <br /> KEEP TRIS PLAN SET ON SITE AT ALI.TIMES <br /> This site has an existing on-site sewage treatment system. The system is a <br /> pressurized mound with a 10' x 50' rockbed. A 2 bedroom addition is proposed for the <br /> home. An additional 10' x 32' rockbed will need to be added with 1' of sand below the <br /> rockbed using soil boring #1 with mottled soil (redox features) at 24" below grade. Soil <br /> borings completed found mottled soil at 20" & 24" below grade. Soil borings through <br /> the mound found the original soil at elev. 95.4 east & 95.9 west. With the bottom of the <br /> rock bed at elev.94.5 west & 93.7 east, this leaves 1.4' & 1.7' of sand below the <br /> rockbed. The system meets the required 3' separation from the bottom of the rock bed <br /> & the redox features. The existing toe of the mound was found at 13', 14', 19' & 24' <br /> from the edge of the rock bed which meets code with a slope of less than 1%. A quart <br /> jar test found 1/32" of sediment after 1 hour of settling time. <br /> This on-site sewage treatment system is designed for a Type 1, 6 bedroom home, in <br /> accordance with the Minnesota Pollution Control Agency Chapter 7080 and local <br /> ordinances. <br /> The soils at a depth of 12" have a percolation rate of 6.7 mpi. <br /> The existing tanks are too small & less than 20' from the new addition. The existing <br /> tanks will be abandoned, pumped & filled with soil & add 2 new 1250 gallon tanks. The <br /> City requires an effluent filter be installed at the outlet of the 2nd tank. <br /> The existing pumping chamber may be used if water tight. If not replace with a 1250 <br /> gallon tank. The existing pump may be used if it meets 62 gal/min with 31' of head <br /> pressure. According to City records, the existing perforations are 1/4", 36" apart. <br /> 1 <br />