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MCR ENGINEERING <br />1242 Dupont Court <br />Manteca, CA 95336 <br />(209)239-6229 <br />FAX (209) 239-8839 <br />Proposed Septic Tank Calculations <br />JOB: 17-074 Nile Garden Elementary <br />ADDRESS: 5700 EAST NILE AVE, MANTECA, CA 95337 <br />BY: DBMS <br />DATE: 7/12/2019 <br />Mine (F) Event Person Max Design Flowrate "Max Flowrates & Volumes Per the California Plumbing Code <br />Quantijy Duration (min) I Uses I Gal/Day <br />Drinking Fountains 1 - - 0.1 0.10 <br />Public Lavatory Faucet 1 0.5 N/A 0.33 2 0.33 <br />Water Closets Flushometer 1 N/A 1.6 1 1.60 <br />Single Person Max Flowrate Per Event (2 -Hour Duration) = 2.0 <br />Single Person Design Flowrate Per Event (2 -Hour Duration) = 2.0 <br />Building (G) Proposed Average Daily Flowrates <br />Design Volume Per Person JUE gal/day # Staff/Room = 2 <br /># of Rooms = 3 # Students/Room = 30 <br />Total Flowrate Per Day = 960.0 <br />Building (F) Proposed Average Daily Flowrates <br />Design Volume Per Person = gal/day <br /># of Rooms = 1 <br />Design Volume Per Person <br />Total Proposed Average Daily Flowrate <br />Septic Tank - Design Calculations <br />Base Tank Capacity = gal <br />Average Daily Flow —1 6,378 Igal <br /># Staff/Room = 375 <br />Total Flowrate Per Day = 3,750.0 <br />Max Occupancy = 834 <br />Total Flowrate Per Day = 1,668.0 <br />Total Design Average Daily Flowrate = 6,378.0 <br />"Per San Joaquin County OWTS Standards <br />Req. Percolation Volume =7,578 gal <br />Calculated Tank Capacity =5,909 gal <br />Design Tank Capacity =1 6,000 gal <br />Page 2 of 2 <br />