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2011 purple code Mound Design <br /> www.SepticResource.com (vers 15.2) <br /> Property Owner: Norton Homes Date: 3/22/2018 <br /> Site Address: 4745 Augusta Street PID: 0611723320009 <br /> Comments: <br /> instructions: =enter data = adjust if desired = computer calculated - DO NOT CHANGE! <br /> , 5 bedroom Type I Residential System <br /> 2, 750 GPD design flow <br /> 3) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks <br /> 2250 Gal Septic tank (code minimum) 2250 Gal Septic tank (design size / LUG req'd) <br /> Tank options: none <br /> 1.2 GPD/ft2 mound sand loading rate contour loading rate of 12 req's a min 63 ft. long rockbed <br /> 9.9 ft rockbed width 63.0 ft rockbed length <br /> 7, 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) <br /> end feed manifold connection <br /> 3 laterals 61.0 feet tong 21.0 perfs / lateral 63 perfs total <br /> (1/2 a perf means the first perf starts at the middle feed manifold) <br /> <„ 7/32 inch perfs at 1 feet residual head gives 0.56 gpm flow rate per perforation <br /> for this perf size&spacing, a pipe size on line 12, max perfs/lateral = 30 , line#8 must be less --> OK <br /> iu) 4.0 doses per day (4 minimum) <br /> I i) 188 gallons per dose (treatment volume) <br /> 2.00 5x <br /> 12, 2.00 inch diameter laterals must be used to meet"4x pipe volume" requirement <br /> 2.00 3x <br /> 13, 50 feet of 2.0 inch supply tine leads to 9 gallons of drainback volume <br /> (Tip: "top feed" manifold to control the drainback) <br /> 1-u 197 gallons TOTAL pump out volume (treatment+drainback) <br /> 13, 13 feet vertical lift from pump to mound laterals, leads to a: <br /> 36 GPM 21 feet of head, Pump requirement (note: >50gpm may require an extra 3-6'of head) <br /> 17, 750 gal Dose tank (code minimum) 1300 gal Dose tank (design size / LUG req'd) at 25.49 gpi <br /> leads to a <br /> si 7.7 inch swing on Demand float, or timed dosing of 5.5 min ON (confirm pump rate with drawdown <br /> (this delivers Average flow, =70%of Peak design flow) 9 hrs OFF test and adjust as necessary) <br /> 12 inches from bottom of tank to"Pump OFF"float <br /> 2o, 20 inches from bottom of tank to"Pump ON"float, or 12 inches to"Timer ON"float if time dosed <br /> 21, 23 inches from bottom of tank to"Hi Level"float, or 33 inches to"Hi Level'float if time dosed <br /> __; 714 gallons reserve capacity (after High Level Alarm is activated) <br />