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2011 purplecode Mound Design <br />www.SepticResource.com (vers 19.2) <br />Property Owner: Welsh Forsman Assocates <br />Site Address: 1160 Mooney Lake Drive <br />Comments: Primary site <br />Date: 4/14/2021 <br />PID: 2511823410020 <br />instructions: F—I = enter data = = adjust if desired = = computer calculated - DO NOT CHANGE! <br />1) 0 bedroom Type <br />2) 600 GPD design flow <br />3) Yes Garbage disposal or pumped to septic <br />4) 2250 Gal Septic tank (code minimum) <br />1.2 GPD/ftz mound sand Loading rate <br />Residential System <br />50% larger tank with multiple comp/tanks <br />2250 Gal Septic tank (design size / LUG req'd) <br />Tank options: none <br />contour loading rate of12 req's a min 50 ft. long rockbed <br />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 />0laterals 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 />7/32 inch perfs at feet residual head gives 0.56 gpm flow rate per perforation <br />for this perf size Et spacing, Et pipe size on line 12, max perfs/lateral = 30 , line #8 must be less > OK <br />to) 4.0 doses per day (4 minimum) <br />t 1) 150 gallons per dose (treatment volume) <br />12) 2.00 inch diameter laterals must be used to meet 'Ax pipe volume" requirement <br />13) 265 feet of 2.0 inch supply line leads to 45 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />14) 195 gallons TOTAL pump out volume (treatment + drainback) <br />15) 48 feet vertical lift from pump to mound laterals, leads to a: <br />16) 29 GPM C 61 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 25.49 gpi <br />leads to a: Optional Time dosing of: <br />18) 7.7 inch swing on Demand float, (this delivers Average flow, =70% of Peak design flow) <br />6.7 min ON <br />19) 12 inches from bottom of tank to "Pump OFF" float 8.5 hrs OFF <br />20) 1 20 linches from bottom of tank to "Pump ON" float 12 inches to "Timer ON" float <br />21) 1 23 linches from bottom of tank to "Hi Level" float 33 inches to "Hi Level" float <br />22) 664 gallons reserve capacity (after High Level Alarm is activated -demand dosed) <br />