10-18-2018 Septic Design - Laserfiche WebLink

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instructions: = =enter data 0 = adjust if desired 0 = computer calculated - DO NOT CHANGE! 1) =bedroom Type �I Residential System i 75D GPD design flow ;} Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks Gal Septic tank (code minimum) 2250 Gal Septic tank (design size /LUG req'd) 1) F2250 Tank options: none 5} 1.2 GPD/fe mound sand loading rate contour loading rate of12 req's a min 62.5 ft. long rockbed it 16.0 ft rockbed width 62.5 ft rockbed length i} 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) end feed manifold connection ;} =laterals 60.5 feet long 21.0 perfs / lateral 63 perfs total (1 /2 a perf means the first pert starts at the middle feed manifold) �} 7132 inch perfs at =feet residual head gives 0.56 gpm flow rate per perforation for this pert size 8 spacing, ft pipe size on line 12, max perfs/lateral = 30 line #8 must be less ?I<. In) 4.0 doses per day (4 minimum) 1 I) F 188 gallons per dose (treatment volume) 2.00 5x 12} 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement 2.00 3x 13) 25 feet of 2.0 inch supply line leads to �galions of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 142 gallons TOTAL pump out volume (treatment + drainback) is} P36 feet vertical lift from pump to mound laterals, leads to a: G} GPM Ca 16 feet of head, Pump requirement (note: >50gpm may require an extra 3.6' of head) 17} F750 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at F 25.49 gpi leads to a 18} 7.5 inch swing on Demand float, or timed dosing of5.3 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow) 1 9 1hrs OFF test and adjust as necessary) ig) 12 inches from bottom of tank to "Pump OFF" float N) 20 inches from bottom of tank to "Pump ON" float, or FI 12 inches to "Timer ON" float if time dosed >-i) 23 inches from bottom of tank to "Hi Level" float, or F 33 1 inches to "Hi Level" float if time dosed 22} 664 gallons reserve capacity (after High Level Alarm is activated) 0.45 gpd/ft' Absorption area Soil Loading Rate, which gives a mound ratio of [124] (minimum) (this must match the soil boring log) desired mound ratio =percent site slope (0-20% range) =(% downslope site slope, if different than upstope) 18 inches, or 1.5 ft. to Redox or other limiting condition (need at least 12" to be a Type 1) Treatment zone contains Tinches of 0% soil credit, and =inches of 50% soil credit. Giving a: 18 inch, or 1.5 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONS I I I 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 0.0 ft. upslope and sideslope