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2091 purple code Mound Design <br />www.SepticResource.com (vers 15.2) <br />Property Owner: Swanson Homes <br />Site Address: 455 North Arm Drive <br />Comments: Primary lx Future site <br />Date: 12/14/2020 <br />PID: 0611723310013 <br />instructions: = enter data = adjust if desired = computer calculated - DO NOT CHANGE! <br />1) F4 bedroom Type Residential System <br />2) b00 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 />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 />7) 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) <br />end feed manifold connection <br />8) 0laterals F48.0 feet long 17.0 perfs / lateral 51 perfs total <br />(1/2 a perf means the first pert starts at the middle feed manifold) <br />9) 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 />10) 4.0 doses per day (4 minimum) <br />)1) 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) 80 feet of 2.0 inch supply line leads to =gaLlons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />14) 164 gallons TOTAL pump out volume (treatment + drainback) <br />1s) 20 feet vertical lift from pump to mound laterals, leads to a: <br />16) 29 GPM @ 28 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head') <br />17) 500 gal Dose tank (code minimum) 1DDD gal Dose tank (design size / LUG req'd) at 25.00 gpi <br />Leads to a <br />18) 6.6 inch swing on Demand float, or timed dosing ofMhrs <br />min ON (confirm pump rate with drawdown <br />(this delivers Average flow, =70% of Peak design flow) OFF test and adjust as necessary) <br />1g)12 inches from bottom of tank to "Pump OFF" float <br />20) 19 inches from bottom of tank to "Pump ON" float, orF3q2 <br />inches to "Timer ON" float if time dosed <br />21) 22 inches from bottom of tank to `"Hi Level" float, or inches to "Hi Level" float if time dosed <br />22) 45D gallons reserve capacity (after High Level Alarm is activated) <br />