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2011 purple code At -grade Design <br />Property Owner: Erik Schutz <br />Site Address; 250 Wakefield Road <br />www.SepticResource.com (vers 15.2) <br />Date: 7/9/2021 <br />PID: 3611823310012 <br />Comments: Two rock beds split in half <br />structions: = = enter data = = adjust if desired = computer calculated - DO NOT CHANGE! <br />bedroom Type Residential System <br />375 GPD design flow <br />1 Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks <br />> 2250 Gallon septic tank (code minimum) Gallon Septic tank (design size / LUG req'd) <br />Tank options: none <br />7.00 GPD/ft2 Soil Loading Rate (this must match the soil boring log) <br />375 ft absorption area (code minimum) 375 ft absorption area (design size / LUG req'd) <br />7) gpd/ft Contour Loading Rate (from table: 8 gal/ft maximum, 12 gal/ft "stacked" sytem total) <br />a) 54 ft rockbed absorption length (minimum) <br />�) 6.9 ft rockbed absorption width (15' maximum) <br />10) 2.0 ft perforation spacing (maximum of 3) <br />end feed imanifold connection <br />11) lateral 52.0 feet long 27.0 perfs i lateral 27 perfs total <br />(1 /2 a pert means your first perf starts at the middle fed manifold) <br />12) 7/32 inch perfs at feet residual head gives 0.56 gpm flow rate per perforation <br />for this perf size Ft spacing, Ft pipe size on line 15, max perfs/lateral = =, line #11 must be less > OK <br />13) 4.0 doses per day (4 minimum) <br />14) 94 gallons per dose (treatment volume) <br />2.00 5x <br />15) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement <br />2.00 3x <br />16) 107 feet of 2.0 inch supply line leads to 18 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />17) 112 gallons TOTAL pump out volume (treatment + drainback) <br />18) 12 feet vertical lift from pump to drainfield laterals, leads to a <br />19) 31 GPM C 21 feet of head Pump requirement <br />(note: >50 gpm may require an additional 3-6' of head for discharge assembly) <br />375 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 25.49 gpi <br />leads to a <br />