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2011 purple code Mound Design <br />www.SepticResource.com (vers 15.2) <br />Property Owner: John Harris <br />Site Address: 2445 Woodhaven Drive. <br />Date: 212712020 <br />PID: 3311823410010 <br />Comments: Replace rock bed and add sand. <br />instructions: = = enter data = adjust if desired = computer calculated - DO NOT CHANGE! <br />1) bedroom Type 0 Residential System <br />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) 2250 Gal Septic tank (design size / LUG req'd) <br />Tank options: none <br />5) 1.2 GPD/ft2 mound sand loading rate contour loading rate of F12 req's a min 50 ft. long rockbed <br />6) F 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) Olaterals 48.0 feet long 17.0 perfs / lateral 51 1perfs total <br />(1 /2 a perf means the first pert starts at the middle feed manifold) <br />C)) 1 l4" inch perfs at feet residual head gives 0.74 gpm flow rate per perforation <br />for this pert size Et spacing, Ft pipe size on line 12, max perfs/lateral = 25 line #8 must be less > OK <br />lo) 4.0 doses per day ( 4 minimum) <br />11) 150 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) 40 feet of 2.0 inch supply line leads to F7 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />14) 157 gallons TOTAL pump out volume (treatment + drainback) <br />is) 13 feet vertical lift from pump to mound laterals, leads to a: <br />16) 38 GPM @ 20 feet of head, Pump requirement (note: 550gpm 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.QQ gpi <br />Leads to a <br />18) 6.3 inch swing on Demand float, or timed dosing of4.1�hrs <br />min ON (confirm pump rate with drawdown <br />fl <br />(this delivers Average flow, =70% of Peak design ow) 9 OFF test and adjust as necessary) <br />19) 12 inches from bottom of tank to "Pump OFF" float <br />20) 18 inches from bottom of tank to "Pump ON" float, orP31 <br />inches to "Timer ON" float if time dosed <br />21) 21 inches from bottom of tank to "Hi Level" float, or inches to "Hi Level" float if time dosed <br />22) 475 gallons reserve capacity (after High Level Alarm is activated) <br />