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2011 purple code Multi Flow a Pressure Bed <br /> www.SepticResource.com (vers 15.2) <br /> Property Owner: Thomas Hamilton Date: 10/21/2017 <br /> Site Address: Lot 2,BIk.1, Fox Hill Orono PID: <br /> Comments: digout Et backfill with sand <br /> instructions: =site specific input =adjust if desired =self-calculated (DO NOT ADJUST) <br /> 1) 5 bedroom Type I IV I Residential System <br /> 2) 750 GPD design flow (average flow should be < 70%of design flow) <br /> PRETREATMENT: (Residential strength to level"A") <br /> 3) 1500 Gallon Trash trap/pump tank to Multi-flow split-500 gal trash trap - 1000 dose tank <br /> 4) 750 Gallon Multi-flow unit <br /> 5) 30 gpm 10 ft head TREATMENT pump 48 doses per day 15.6 gal /dose (treatment) <br /> 10 feet of 2.0 inch supply line leads to 2 gallons of drainback volume <br /> 17.6 gallons total pump out volume <br /> Timed dosing of 35 sec ON (confirm pump rate with drawdown <br /> 29.4 min OFF test and adjust as necessary) <br /> 6) 18 inches from bottom of tank to Timer ON float <br /> Hi level Alarm to be set at 75 %of tank capacity <br /> UV light req'd No <br /> DISPERSAL: <br /> 7) 0.78 GPD/ft2 Soil Loading Rate 962 ft2 (code minimum) 1005 ft2(design size / LUG req'd) <br /> Treatment Level A/B (must match soil boring tog) <br /> 8) I 15.0 Ift desired bed width, leads to a 67.0 ft bed length <br /> (25'maximum) <br /> 9) 3.0 ft lateral spacing 3.0 ft perforation spacing ( maximum 3 for both) <br /> end feed manifold connection <br /> 10) 5 laterals 65.0 feet long 22.0 perfs / lateral 110 perfs total <br /> (1/2 perf means the 1st pert starts at the middle feed manifold) <br /> 11) 3/16 inch perfs at 1 feet residual head gives 0.42 gpm flow rate per perforation <br /> ( If bed has > 1'of cover, increase residual head for cleanout req's) <br /> for this pert size 8 spacing, a pipe size on line 14, max perfs/lateral = 22 , line#10 must be less --> OK <br /> 12) 4.0 doses per day (4 minimum) <br /> 13) 188 gallons per dose (treatment volume) <br /> 1.50 5x <br /> 14) 1.50 inch diameter laterals must be used to meet"4x pipe volume" requirement <br /> 2.00 3x <br />