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MCR ENGINEERING Proposed Septic System B Calculations 1242 Dupont Court JOB : 19-006 New Haven Elementary Manteca, CA 95336 ADDRESS : 14600 Ausin Rd, Manteca, CA 95336 (209) 239-6229 BY: DB/MS FAX (209) 239-8839 DATE: 8/ 12/2020 Total Flowrate Design Calculations Building (H) Proposed Average Daily Flowrates Max Design Volume Per Person = I gal/day # Staff/Room = 2 # of Rooms = 1 # Students/Room = 60 Average/Max Flowrate Per Day = 620 . 0 Building (H) Proposed Event Daily Flowrates Building Design Volume per Hour = I I gal/hour # of Hours Per Event 3 Max Flowrate Per Day = 600.0 # of Events Per Year = 15 events/yr Average Flowrate Per Day = 24.7 Design Flowrate Summary Total Max Design Flowrate Per Day = 1 ,220 . 0 Total Design Average Flowrate Per Day = 644 . 7 Septic System Calculations Septic Tank - DeSi2n Calculations "Per San Joaquin County OWTS Standards Min. Base Tank Capacity = 6jj I I gal Calculated Tank Capacity = 1 , 845 Igal Average Daily Flow — 1 645 gal Design Tank Capacity = 1 2,500 Igal - Leach Line " OWTS STD Calculations "Per San Joaquin County OWTS Standards Max Daily Flowrate = 1 ,220 . 0 gal Min. Base Tank Capacity = gal Req . Percolation Volume = 2 ,420 . 0 gal Soil Type = M1 16 Soil Factor = Pipe Diameter = in Required Length;-? ft Max Segment Length = ft Filter Bed - OWTS STD Calculations "Per San Joaquin County OFVTSStandards Leach Lines Required Length = 484 ft Filter Bed Factor = Minimum Required Area = 11452 sf Design Length = 100 ft Minimum Required Width = 15 ft Minimum Required Leach Lines = 2 Design Leach Lines = 2 Page 3 of 3