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Koch Soil Testing <br /> Box 81 <br /> Loretto, MN 55357 <br /> (612) 479-2637 <br /> Date 8/28/99 <br /> Name <br /> Ned Butterfield <br /> 3745 Watertown Rd. <br /> Orono,Minn.. <br /> Job Site;Above Address <br /> The present drainfield is bleeding out onto the surface therefore another site was tested to <br /> determine what type of system could be install and still comply with the local codes and <br /> with the Minn. Rules 7080. <br /> The area that was tested is located South of the present house. <br /> The average percolation rate in this area was 38.4 min/in. the depth to mottled soil was at <br /> 18 inches.. <br /> * See the enclosed percolation tests and soil borings for the details. <br /> *Mottled soil is consider the highsS� yrls that exist methe le <br /> t seasons <br /> (Fall and Spring).The Minn. RuleO80 state thatthe minimum depth to d soil must beat <br /> 48 inches or deeper before a trench drainfield can be installed. <br /> 'Therefore with the above information the only type of drainfield that can be installed in this area is <br /> a pressurized mound system and still comply with the current codes. <br /> The size of 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) Perc. Rate Range --46-60 min/in. ( CLay Loam Soil Factor) <br /> 3)Land Slope--4% <br /> Overall Size--2870 sq.$.. <br /> Upslope Length--65 ft. <br /> Downslope Length---75 ft <br /> Width---41 $ .(Upslope-12$Rock-10 ft Downslope--19 ft). <br /> * Absorption Width-- 271 <br /> Rock Bed Size--410 sq. ft Length--41 $ Width--10$ <br /> Amount of materials needed; <br /> Sand--165 yds. 230 tons Ave. Depth--1.7$ <br /> Rock-- 16 yds 23 tons -- 1.0$ <br /> Sandy Loam-- 30 yds. --- 1.0$ <br /> Topsoil -- 85 yds. --- 9 -- 12 inches <br /> *The above amounts could vary by plus or minus 10%. <br />