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OSTP Design Summary Worksheet UNIVERSITY <br />Minnesota Pollution <br />OF MTNN1RC0TA <br />&Okk— <br />w111WI nyency <br />4. SOIL TREATMENT AREA DESIGN SUMMARY <br />Dispersal AreaF____1ftz <br />Total Lineal Feetft <br />Contour Loading Rateft <br />Absorption Areaft2 <br />Bed Widthft <br />Absorption Bed Area 300.0 fe <br />Absorption Width 15,0 ft <br />Upslope Berm Width O,g ft <br />Total System Length 3g,3 ft <br />Absorption Bed Widthft <br />Contour Loading Rategal/# <br />Endslope Berm Widthft <br />Trench Design Summary <br />Sidewall Depthin <br />Number of Trenches <br />Min Trench Length �ft— <br />Bed Design Summary <br />Depth of sidewallin <br />Bed Length�ft <br />Mound Design Summary <br />Bed Length 30.4 ft <br />Clean Sand Lift 2,0 ft <br />Downslope Berm Width O,g ft <br />Total System Width 1g,3 ft— <br />At-Grade Design Summary <br />Absorption Bed Lengthft <br />t Upslope Berm WidthIt <br />System Length[:=ft <br />Level ft Equal Pressure Distribution Summary <br />Trench Widthft <br />Code Maximum Trench Depthin <br />Designer's Max Trench Depthin <br />Code Maximum Bed Depthin <br />Designer's Max Bed Depthin <br />Bed Width 10.0 ft <br />Berm Width (0-1%) 4.2 ft <br />Endslope Berm Width p,g it <br />Contour Loading Rate 10.0 gal/ft <br />No. of Perforated Laterals Perforation Spacing 2.5 It <br />Lateral Diameter 1.50 4n Min. Delivered Volume 37 gat <br />Non -Level and Unequal Pressure Distribution Summary <br />Elevation I I Pipe Volume I Pipe Length I Perforation Size <br />Size <br />Lateral 1 <br />Lateral 2 <br />Lateral 3 <br />Lateral 4 <br />Lateral 5 <br />Lateral 6 <br />5, Additional Info for At -Risk, HSW or Type IV Design <br />A. Calculate the organic loading <br />System Finished Height ft <br />Downslope Berm Widthft <br />System Widthft <br />Perforation Diameter 3/16 in <br />Maximum Delivered Volume 56 gat <br />Minimum Delivered Volume <br />gal <br />Maximum Delivered Volume <br />gal <br />1. Organic Loading to Pretreatment Unit = Design Flow X Estimated BOD in mg/L in the effluent X 8.35 _ 1,000,000 <br />I gpd X mg/L X 8.35 : 1,000,000 = E:=tbs. BOD/day <br />2. Type of Pretreatment Unit Being Installed: <br />3. Calculate Soil Treatment System Organic Loading: BOD concentration after pretreatment Bottom Area = lbs./day/ft' <br />I mg/L X 8.35 - 1,000,000 ' ft2 = lbs./day/ft' <br />Considerations: <br />ieptic Tank: Norwesco; 750 w/gaskets Et tees; Length 92", Width 60", Height 51", Manholes 2-20", Compartments Double, Part number <br />43499; Pump Tank: Norwesco; 500 Sphere, Length 64", Width 67", Height 56", Height to outlet 53", Manholes 1-20", Part number 4078.5 Or <br />quivalent. <br />I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. <br />Paul Brandt PSS 40-4-110 5182 08/08/17 <br />(Designer) (Signature) (License #) (Date) <br />