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Sub Surface Sewage Treatment System <br /> Design Summary <br /> Project/Client Name: Kea Hong <br /> Address: 1165 Wyndmere Road, Orono, MN 55391 <br /> PID#:26-118-23-41-0010 <br /> Existing system components: 2-1000+gal septic tank&1266 sf trench. Existing tank may be used if <br /> inspected and found to be compliant <br /> Number of bedrooms in home:4(design fors because of unfinished basement) <br /> Peak Flow: 750 Average flow: 375 Design flow: 750 <br /> Designed septic tank size: 2000 gallon with 2 compartments(city ordinance requires 2250 for <br /> a five bedroom home may be required to add an additional 500 gallon septic tank) <br /> Designed pump tank size: 1250 or 1300 gallon <br /> Type of dispersal system: Pressure Bed <br /> Dra infield sizing, Soil sizing factor: 1.67 ft2/GPD (1260 ft2 Minimum) <br /> Designed drainfield size: 1260ft2(20'x 63') with 6"rock below the pipe <br /> Type of distribution: Pressure <br /> Laterals: size: 1.5"min. <br /> Perforation sizing and spacing: 7/32"spaced Ton center <br /> Total number of perforations per design: 98(12.9 ft2/perf) <br /> Pump requirements: 55 GPM 14 TDH <br /> Dosing: Demand <br /> Gallons per dose: 191 (including drain back) <br /> Reserve Capacity in pump tank: 93%(700 gallons) <br /> Depth and or elevation to periodically saturated soil: 42" (elevation 96.0) <br /> Maximum depth of drainfield: elevation 99.0 <br /> Percolation rates: Perc#1-14.5 MPI, Perc#2-16 MPI <br /> Classification of system designed: Other <br /> Flow Measurement: Required, event counter&run time meter or water meter in house <br /> 11Page <br />