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�..,��.=,r,�.,�,..�s�., <br /> . Non-Levet Pressure Distribution Design <br /> Minnesota Pollution Worksheet � <br /> Control A enc -"�� <br /> 1. Enter soil treatment area(STA)length in order of the Highest Etevation to the Lowest Elevation: <br /> Lateral t Pipe Elevdtion 67.� ft Length of STA from manifotd 3$ ft Highest <br /> Iateral 2 Pipe Etevation 65.6 fit Length of STA 3$ ft <br /> Laterat 3 Pipe Elevation �ft Length of STA �ft <br /> Lateral 4 Pipe Etevation �ft Length of STA �ft <br /> Lateral 5 Pipe Elevation �ft Length of STA �ft Lowest <br /> 2. Calculate Change in Elevation over the taterals <br /> =Highest Elevation (Lateral 1)-Lowest Elevation(Last Lateral above) 67.� ft _ 65.6 ft = �•5 ft <br /> 3. Select Mi�imum Average Heod: �.� ft <br /> Use 1.0 ft for dwellings using 1/4 inch or 3/16 inch holes. <br /> Use 2.0 ft for dwellings using 1/8 inch holes;or,for MSfS 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 Tota(Head =Minimum Average Head (Line 3)+Change in E(evation (Line 2) <br /> 1.0 ft + 1.5 ft = 2.5 ft <br /> 5. Calculate Pressure Head for Each Lateral <br /> A. Highest trench e(evation (Pipe Elevation 1):Pressure Head equals Minimum Average Head (Line 3) <br /> B.All other trenches:Pressure Head equals Minimum Averoge Heod (Line 3)plus the Change in E(evotion from Lateral 1. <br /> Etevation of Elevation of <br /> Minimum Average Head �terall Lateral Pressure Head <br /> �t, 1.0 fc + [ 67.1 fc - 67.1 ft] = 1.0 ft <br /> �t 2 1.0 ft + t 67.1 ft - 65.6 ft� = 2.5 ft <br /> Lat 3 �ft + [�ft -�ft] _ �ft <br /> Lat 4 �ft + [�ft -�ft] _ �ft <br /> Lat 5 �ft + [�ft -�ft] _ �ft <br /> L�I <br />