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MCR ENGINEERING Proposed Leach Field A Calculations <br /> 1242 Dupont Court JOB: 19-006 New Haven Elementary <br /> Manteca,CA 95336 ADDRESS: 14600 Ausin Rd,Manteca,CA 95336 <br /> (209)239-6229 BY: DB/MS <br /> FAX(209)239-8839 DATE: 3/6/2020 <br /> Total Flowrate Design Calculations <br /> Proposed Total School Average Daily Flowrates <br /> Design Volume Per Person= gal/day Total#Staff= 40 <br /> Total#Students= 894 <br /> Average Flowrate Per Day= 9,340.0 <br /> Existing Building(D) Average Daily Flowrates (To Separate System) <br /> Design Volume Per Person= t gal/day #Staff/Room= 1 <br /> #of Rooms= 6 #Students/Room= 20 <br /> Average Flowrate Per Day= -1,260.0 <br /> Proposed Building(H) Average Daily Flowrates (To Separate System) <br /> Design Volume Per Person= >r" gal/day #Staff/Room= 2 <br /> #of Rooms= 1 #Students/Room= 60 <br /> Average Flowrate Per Day= -620.0 <br /> Design Flowrate Summary <br /> Total Max Design Flowrate Per Day= 7,460.0 <br /> Total Design Average Flowrate Per Day= 7,460.0 <br /> Engineered System Calculations <br /> Leach Line - Engineer Calculations "Percolation Rates Per Geotechnial Engineering Report <br /> Total Max Daily Flowrate=mm <br /> gal 10 min/in <br /> Min. Base Tank Capacity= gal Soil Percolation Rate(P)= 3.5 gal/sf/day <br /> Req. Percolation Volume= gal Req. Percolation Area= 2,474 sf <br /> Calculated Required Length= ft Trench Width= "-� in <br /> Design Length= ft Trench Depth Below Pipe= in <br /> Tench Area/LF= 4 sf/LF <br /> "Design Requirements Per San Joaquin County OWTS Standards <br /> Page 2 of 3 <br />