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Koch Soil Testing <br /> Box 81 <br /> Loretto, MN 55357 <br /> (612) 479-2637 <br /> Name; Date:5/28/98 <br /> Tim Sweezo <br /> 4480 Watertown Rd. <br /> Orono,Minn.. <br /> JOB SITE: <br /> The Above Address... <br /> The present drainfield was determine not to in working order and did not comply to the current <br /> City of Orono On-Site Sewage Codes. This determination was made by Mr. Steve Wickman the <br /> On-Site Sewage Inspector from the City of Orono. <br /> Two sites were tested to determine what type of drainfield could be installed and still comply <br /> with the Minnesota Rules 7080 and the City of Orono Codes. . <br /> The average percolation rate in the primary site ( Site-1) was 38.7 min/in. and the depth to <br /> mottled soil was at 16 inches. While in the alternate site ( Site-2 )the average percolation rate <br /> was 39.8 min/in. and the depth to mottled soil was at 17,20, &24 inches. <br /> Mottled soil is consider the high seasonal saturated soil levels that exist during the wet seasons <br /> (SPRING and FALL). The Minn Rules 7080 and the City of Orono codes require that the <br /> minimum depth to mottled soil be at 48 inches or deeper before a standard trench system can be <br /> installed. <br /> Therefore with the above information the only type of system that can be installed is a pressurized <br /> mound system and still comply with the local and the Minnesota State current codes. <br /> The size of the mound system needed for a 3 bedroom home would be the following size; <br /> * Sizing Factors: 1)Daily Water Usage 450 gal/day <br /> 2)Pere. Rate Range 46-60 min/in.. (CLAY Loam Soil Sizing Factor) <br /> Site# 1 Area Overall Size --- 3053 sq.ft <br /> Upslope Length-- 67 it <br /> Down Slope Length--- 75 ft <br /> Width---- 43 I ( Upslope With-13 ft Rock Width- 10 ft'. <br /> Downslope Sand Width-20 ft) * Total Absorption Width-27 ft <br /> Rock Bed Size Length---41 ft. Width--- 101 (410 sq.ft) <br />