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. <br /> 2011 purplecode Mound Design <br /> www.SepticResource.com (vers 15.2) <br /> Property Owner: Charles Krogness Date: 7/31/2015 <br /> Site Address: 185 South Brown Road, Orono, MN PID: <br /> Comments: <br /> instructions: � =enter data � = adjust if desired � = computer calculated- DO NOT CHANGE! <br /> i� �4 bedroom Type � Residential System <br /> 2� 600 GPD design flow <br /> 3� No Garbage disposal or pumped to septic <br /> a� 2000 Gal Septic tank (code minimum) 1500 Gal Septic tank (design size/ LUG req'd) <br /> Tank options: none <br /> s> 1.2 GPD/ftZ mound sand loading rate contour loading rate of 12 req's a min 50 ft. long rockbed <br /> 6� 10.0 ft rockbed width 50.0 ft rockbed length <br /> �� 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) <br /> end feed manifold connection <br /> g) �3 laterats 48.0 feet long 17.0 perfs / lateral 51 perfs total <br /> (1/2 a perf means the first perf starts at the middle feed manifold) <br /> 9> 7/32 inch perfs at �1 feet residual head gives 0.56 gpm flow rate per perforation <br /> for this perf size tt spacing, £t pipe size on line 12, max perfs/lateral= 30 , line#8 must be less--> OK <br /> �o> 4.0 doses per day (4 minimum) <br /> i l� 150 gallons per dose (treatment volume) <br /> 2.00 5x <br /> i2� 2.00 inch diameter laterals must be used to meet"4x pipe volume" requirement <br /> 2.00 3x <br /> i3� 4fl feet of 2.0 inch supply line teads to �gallons of drainback volume <br /> (Tip: "top feed" manifold to control the drainback) <br /> ia� 157 gallons TOTAL pump out volume (treatment+ drainback) <br /> is� 13 feet vertical lift from pump to mound laterals, leads to a: <br /> i6� 29 GPM C� 20 feet of head, Pump requirement (note: >50gpm may require an extra 3-6'of head) <br /> i�> 1000 gal Dose tank (code minimum) 1000 gal Dose tank (design size / LUG req'd) at 21.00 gpi <br /> leads to a <br /> �s) 7.5 inch swing on Demand float, or timed dosing of 5.4 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 /> i9> 12 inches from bottom of tank to"Pump OFP' float <br /> 20> 20 inches from bottom of tank to"Pump ON"ftoat, or 12 inches to"Timer ON"float if time dosed <br /> zi� 23 inches from bottom of tank to"Hi Level"float, or 33 inches to"Hi Level"float if time dosed <br /> z2� 517 gallons reserve capacity (after High Level Alarm is activated) <br />