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2411 purple code Mound design www.SepticResource.com (vers 15.2) Property Owner: Swanson Homes Site Address: 730 Lakeview Parkway Comments: Date: 1/26/2021 PID: 0611723340013 instructions: = = enter data = adjust if desired = = computer calculated - DO NOT CHANGE! 1)bedroom Type �I Residential System 2) 450 GPD design flow 3) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks a) 1500 Gal Septic tank (code minimum) 1500 Gal Septic tank (design size / LUG req'd) Tank options: none 5) 1.2 GPDlft2 mound sand loading rate contour loading rate of F12 req's a min 37.5 ft. long rockbed 5) 10.0 ft rockbed width 37.5 ft rockbed length 7) 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) end feed manifold connection s) laterals 35.5 feet long 12.0 perfs / lateral 36 perfs total (1/2 a perf means the first perf starts at the middle feed manifold) 9) 7132 inch perfs atfeet residual head gives 0.56 gpm flow rate per perforation for this perf size Fr spacing, EL pipe size on line 12, max perfs/lateral = r 30 line #8 must be less > OK 10) 4.0 doses per day (4 minimum) 11) 113 gallons per dose (treatment volume) 2.00 5x 12) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement 2.00 3x 13) 75 feet of 2.0 inch supply line leads to 13 gallons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 126 gallons TOTAL pump out volume (treatment + drainback) 15) 13 feet vertical lift from pump to mound laterals, leads to a: 16) 21 GPM @ 20 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) 17) 500 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 25.49 gpi leads to a is) 4.9 inch swing on Demand float, or timed dosing of 6min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design f(ow)L ' Ihrs OFF test and adjust as necessary) 19) Tinches inches from bottom of tank to "Pump OFF" float 20) inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed 21) from bottom of tank to "Hi Level" float, or 30 inches to "Hi. Level' float if time dosed 22) 740 gallons reserve capacity (after High Level Alarm is activated)