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2011 purple code Mound Design <br />www.SepticResource.com (vers 19.2) <br />Property Owner: <br />Site Address: <br />Comments: <br />Laura Hirschberg <br />2080 Salem Ct. <br />= = enter data = = adjust if desired <br />1) =bedroom Type III Residential <br />21 600 GPD design flow <br />3) =Garbage disposal or pumped to septic <br />Date: 10/2/2019 <br />PID: 2711823310016 <br />= = computer calculated - DO NOT CHANGE! <br />System <br />4) 1500 Gal Septic tank (code minimum) 2650 Gal Septic tank (design size / LUG req'd) <br />Tank options: none <br />1.2 GPD/ftz <br />mound sand loading rate <br />contour loading rate of <br />F12 req's a min <br />50 ft. long rockbed <br />10.0 ft rockbed width 50.0 ft <br />rockbed length <br />3.0 ft lateral spacing =ft perforation spacing (maximum of 3 for both) <br />end feed manifold connection <br />=3 laterals 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 />1 /4" inch perfs at =feet residual head gives 0.74 gpm flow rate per perforation <br />for this perf size 8: spacing, t} pipe size on line 12, max perfs/lateral = ZS line #8 must be less > <br />10) 4.0 doses per day (4 minimum) <br />11 i 150 gallons per dose (treatment volume) <br />2) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement <br />3) 40 feet of 2.0 inch supply line leads to gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />4) 157 gallons TOTAL pump out volume (treatment + drainback) <br />s) 14 feet vertical lift from pump to mound laterals, leads to a: <br />b) 38 GPM @ 21 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) <br />17)500 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 29.06 gpi <br />leads to a: Optional Time dosing of: <br />18) <br />=inch swing on Demand float, (this delivers Average flow, =70% of Peak design flow) <br />4.1 min ON <br />19) 12 inches from bottom of tank to "Pump OFF" float 8.5 hrs OFF <br />20) 17 inches from bottom of tank to "Pump ON" float 12 inches to "Timer ON" float <br />21) 20 inches from bottom of tank to "Hi Level" float 30 inches to "Hi Level" float <br />669 gallons reserve capacity (after High Level Alarm is activated -demand dosed) <br />