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201 purple code Mound Design "" <br />Property Owner: Nora SiLLerud <br />Site Address: 415 Deborah Dr. Orono <br />Comments: <br />Date: 8/4/2019 <br />PID: <br />:tions: O =enter data O = adjust if desired = = computer calculated - DO NOT CHANGE! <br />=bedroom Type �I Residential System <br />750 JGPD design flow <br />No Garbage disposal or pumped to septic <br />2250 Gal Septic tank (code minimum) <br />2250 Gal Septic tank (design size / LUG read) <br />Tank options: none <br />s) 1.2 GPD/ft2 mound sand loading rate contour loading rate of 12 req's a min 62.5 ft. long rockbed <br />10.0 ft rockbed width F62.5 ft rockbed length <br />3.0 ft perforation spacing (maximum of 3 for both) <br />7) =ft lateral spacing <br />end feed manifold connection <br />a) =laterals 60.5 feet long 21.0 perfs / lateral 63 perfs total <br />(1/2 a pert means the first perf starts at the middle feed manifold) <br />9) i/4" inch perfs at =feet residual head gives 0.74 gpm flow rate per perforation <br />for this perf size Et spacing, Ft pipe size on line 12, max perfs/lateral = 25 , line #8 must be less - OK <br />107 4.0 doses per day (4 minimum) <br />11) 188 gallons per dose (treatment volume) <br />2.00 5x <br />e) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement <br />2.00 3x <br />l;1 40 feet of 2.0 inch supply line leads to =7 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />w) F 195 gallons TOTAL pump out volume (treatment+ drainback) <br />117 10 feet vertical lift from pump to mound laterals, leads to a: <br />16) 47 GPM @ =feet of head, Pump requirement (note: >50gpm may require an extra 3-6of head) <br />gal Dose tank (design size /LUG req d) at F26.00gpi <br />17) F12570gaL Dose tank (code minimum) F1250 <br />Leads to a <br />18) =inch swing on Demand float, or timed dosing of 4.1 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 />19) 12 inches from bottom of tank to "Pump OFF' float <br />20) 20 inches from bottom of tank to "Pump ON" float, or12 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 />22) 652 gallons reserve capacity (after High Level Alarm is activated) <br />