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2011 purpte code Mound Design <br />vwww.SepticResource.eom (vers 19.2) <br />Property Owner: Mary Dunn Trust <br />Site Address: 15 Stubbs Bay Road N. <br />Comments: <br />Date: 5/1/2021 <br />PID: 3211823340006 <br />instructions: u = enter data = adjust if desired = = computer calculated - DO NOT CHANGE! <br />1) bedroom Type �I Residential System <br />2) 600 GPD design flow <br />3) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks <br />4) 2250 Gal Septic tank (code minimum) 225p Gal Septic tank (design size / LUG req'd) <br />Tank options: none <br />s) 1,2 GPD/ft2 mound sand loading rate contour loading rate of =req's a min 50 ft. long rockbed <br />b) 10.0 ft rockbed width 50.0 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 />8) laterals 48.0 feet long 17.0 perfs / lateral 51 perfs total <br />(1 /2 a perf means the first pert starts at the middle feed manifold) <br />9) 7f 32 inch perfs at feet residual head gives 0.56 gpm flow rate per perforation <br />for this perf size Ft spacing, Ft pipe size on line 12, max perfs/lateral = 30 > line #8 must be less > OK <br />10) 4A doses per day (4 minimum) <br />1 i) E 1707 gallons per dose (treatment volume) <br />12) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement <br />13) 15 feet of 2.0 inch supply line leads to ®gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />14) 153 gallons TOTAL pump out volume (treatment + drainback) <br />)s) 8 feet vertical lift from pump to mound laterals, leads to a: <br />16) 29 GPM @ 14 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) <br />17) 500 gal Dose tank (code minimum) 9250 gal Dose tank (design size / LUG req'd) at 25.49 19pi <br />leads to a: I Optional Time dosing of: <br />18) 6.0 inch swing on Demand float, (this delivers Average flow, =70% of Peak design flow) <br />5.3 min ON <br />19) 12 inches from bottom of tank to "Pump OFF" float 8.5 hrs OFF <br />24) 18 1 inches from bottom of tank to "Pump ON" float 12 inches to "Timer ON" float <br />21) 1 21 linches from bottom of tank to "Hi Level" float 31 inches to "Hi Level" float <br />22) 715 gallons reserve capacity (after High Level Alarm is activated -demand dosed) <br />