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Septic design/Proposed Lot 2
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Septic design/Proposed Lot 2
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Last modified
8/22/2023 4:36:13 PM
Creation date
2/4/2016 12:50:57 PM
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x Address Old
House Number
445
Street Name
Brown
Street Type
Road
Street Direction
South
Address
445 Brown Rd S
Document Type
Septic
PIN
0311723310001
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. ^`�`- � <br /> J <br /> OSTP Non-Levet Pressure Distribution <br /> tTNIVERSITY � <br /> Minnesota Pollution Design Worksheet OF MINNESOTA '1„ <br /> Control A enc ��\ , <br /> 1. Enter soil treatment area(STA)length in order of the Highest Elevation to the lowest Elevation: <br /> Laterdl 1 Pipe Elevation 946.3 ft Length of STA from manifold 32 ft Highest <br /> Lateral 2 Pipe Elevation 943.0 ft Length of STA 32 ft <br /> Lateral 3 Pipe Elevation �ft Length of STA �ft <br /> Lateral 4 Pipe Elevation �ft Length of STA �2 ft <br /> Lateral 5 Pipe Elevation �ft Length of STA Qft Lowest <br /> 2. Calculate Change in Elevation over the laterals <br /> =Highest Elevation(Lateral 1)-Lowest Elevation(Last Late�at above) 946.3 ft _ 943.0 ft = 3•3 ft <br /> 3. Select Minimum Average Head: 1.0 ft <br /> Use 1.0 ft for dwetlings using 1/4 inch or 3/16 inch holes. <br /> Use 2.0 ft for dweltings using 1/8 inch holes;or,for MSTS or other estabtishments using 1/4 inch or 3/16 inch holes. <br /> This worksheet cannot be used for a Minimum Average Head of 5.0 feet. Design must be modified or valving must be used to <br /> equalize flow. <br /> 4. Calculate the Totn!Head =Minimum Average Head (Line 3)+Change in Elevation (Line 2) <br /> 1.0 ft + 3.3 ft = 4.3 ft <br /> 5. Calwlate Pressure Heod for Each Latero( <br /> A. Highest trench etevation(Pipe Elevation 1):Preswre Head equals Minimum Average Head (Line 3) <br /> B.All other trenches:Preswre Head equals Minimum Averoge Head (Line 3)plus the Change in Elevation from Lateral 1. <br /> Minimum Average Head t�evation or tievanon or Pressure Head <br /> I ataral 1 I atPral <br /> �at t 1.0 ft + [ 946.3 ft - 946.3 ft) = 1.0 ft <br /> �at 2 1.0 ft + [ 946.3 ft - 943.0 ft] = 4.3 ft <br /> Lat 3 �ft + [�ft -�ft] = Qft <br /> Lat 4 �ft + (�ft -�ft] _ �ft <br /> Lat 5 �ft + [�ft -�ft� _ �ft <br /> 6. Determine the Flow Rote per Hole � = 1 9 . 65 cd 2 � <br /> Setect a Perforation Diameter and the corresponding gatlons per minute <br /> from the Perforation Discharge tabte below,adjusting as needed. c=0.60;d=perforation diameter;h=pressure head <br /> or Calculate Perforation Discharge(�in GPM: <br /> Lat 1 Pressure Head 1.0 ft Perforation Diameter 7/32 = 0.56 GPM 0.2187:Highest <br /> Lat 2 Pressure Head 4.3 ft Perforation Diameter 7/32 - 1.17 GPM 0.21875 <br /> Lat 3 Pressure Head � ft Pertoration Diameter� - � GPM FALSE <br /> Lat 4 Pressure Head � ft Perforation Diameter� - � GPM FALSE <br /> Lat 5 Pressure Head � ft Perforation Diameter� - � GPM FALSE Lowest <br />
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