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Mound Design Troy.Johnson(a�co.Wriqht.mn.us <br /> forguestions or comments <br /> Property Owner: Date: 8/15/2010 <br /> Site Address: ��—� �� � .yy�� P�p: <br /> Comments: �/-�d <br /> instructions: C� = req'd input � =input or default � =calculated field •** =installer info <br /> t> �bedroom Type C� Residential System <br /> 2) 750 GPD design flow <br /> 3) No Garbage disposal or pumped to septic <br /> a> *** 2500 Gallon septic tank (minimum) Multiple tanks or compartment req'd <br /> s� 1.2 GPD/ft� mound sand loading rate <br /> 6> 10 ft rockbed width 62.5 ft rockbed length <br /> �> *_* 3.0 ft lateral spacing 3.0 ft perforation spacing (default 3, range 2-3, for both) <br /> end feed manifold connection <br /> s> *•"�laterals 60.5 feet long 21 perfs / lateral 126 perfs total <br /> 9> *"* 7/32 inch perfs at �feet residual head gives 0.56 gpm flow rate per perforation <br /> (3/16"default) (2'head default) <br /> for this perf size£�spacing, £r pipe size on line 12, max perfs/lateral = 14 , line#8 must be less --> ERROR <br /> �o� �doses per day (5 recommended, 4 minimum) (4 will allow 2"laterals, 5 will allow 1.5") <br /> i i� 150 gallons per dose (treatment volume) <br /> i2> 1.25 inch diameter taterals (or smaller)will meet"5x pipe volume" <br /> *** 1.25 inch diameter laterals (or smaller) must be used to meet"4x pipe volume" requirement <br /> 1.50 inch diameter laterals (or smaller)will meet"3x pipe votume" <br /> is> '�"* 75 feet of 2.0 inch suppty line leads to 13 gallons of drainback volume <br /> ("top feed" manifold to control the drainback) <br /> ta� 163 gallons TOTAL pump out volume (treatment+drainback) <br /> ts� 10 feet vertical lift from pump to dispersal area, leads to a: <br /> �6> *'�" 71 GPM C� 26 feet of head, Pump requirement note: >50gpm may require an extra 3-6'of head <br /> t�� !*• 1500 gal Dose tank (minimum) at approximately 31.00 gpi <br /> teads to a <br /> �s> **• 5.3 inch swing on Demand float, or timed dosing of 2.3 min ON (confirm pump rate with drawdown <br /> 4.8 hrs OFF test and adjust as necessary) <br /> i9� 12 inches of efftuent from bottom of tank to cover pump <br /> 20� "*� 17 inches from bottom of tank to"pump ON"float <br /> 2t� '�*• 20 inches from bottom of tank to "Hi Levet Alarm"float (Add a few more inches if Time Dosed) <br /> 2z> 871 gallons reserve capacity (after High Level Alarm is activated) <br />