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2011 purple code Mound Design <br />www.SepticResource.com (vers 15.2) <br />Property Owner: Mark Beltrand Date: 11/12/2018 <br />Site Address: 1860 West Farm Road PID: 2711823430018 <br />Comments: Add 1 bedroom to a 3 bedroom mound <br />instructions: E71 = enter data = adjust if desired = computer calculated - DO NOT CHANGE! <br />1)bedroom Type �I Residential System <br />2) 340 GPD design flow <br />3) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks <br />4) 1500 Gal Septic tank (code minimum) 1500 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 F 12 req's a min 38 ft. long rockbed <br />C) 10.0 Ift rockbed width 12.0 ft rockbed length <br />7) 3.0 ft lateral spacing 3.4 ft perforation spacing (maximum of 3 for both) <br />Lend feed manifold connection <br />8) laterals 10.0 feet long 4.0 perfs / lateral 12 perfs total <br />(1 /2 a perf means the first perf starts at the middle feed manifold) <br />9) 1 /4" inch perfs at feet residual head gives 0.74 gpm flow rate per perforation <br />for this perf size Et spacing, Et pipe size on line 12, max perfs/lateral = 25 , line #8 must be less — OK <br />101 4.0 doses per day (4 minimum) <br />11) 75 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) 200 feet of 2.0 inch supply line leads to34 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />14) 184 gallons TOTAL pump out volume (treatment + drainback) <br />15) 18 feet vertical lift from pump to mound laterals, leads to a: <br />16) 38 GPM @ 33 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) <br />17) 500 gal Dose tank (code minimum) 1000 gal Dose tank (design size / LUG req'd) at 25.00 gpi <br />leads to a <br />18) 7.4 inch swing on Demand float, or timed dosing of4.8 min ON (confirm pump rate with drawdown <br />(this delivers Average flow, =70% of Peak design flow)Mhrs OFF test and adjust as necessary) <br />19) 12 inches from bottom of tank to "Pump OFF" float <br />20) 19 inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed <br />21) 22 inches from bottom of tank to "Hi Level" float, or 32 inches to "Hi Level" float if time dosed <br />22) 450 gallons reserve capacity (after High Level Alarm is activated) <br />