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instructions: = =enter data = adjust if desired = = computer calculated - DO NOT CHANGE! <br />)) =bedroom Type Residential System <br />21 450 GPD design flow <br />3) Na Garbage disposal or pumped to septic <br />4) -1000 Gal Septic tank (code minimum) F20001Gat Septic tank (design size / LUG regd) <br />Tank options: none <br />s) GPD/ft2 mound sand loading rate contour loading rate of712-1req's a min 37.5 ft. long rockbed <br />1.2 <br />e) 10.0 ft rockbed width 38.0 ft rockbed length <br />z) 3.0 ft lateral spacing 3,0 ft perforation spacing (maximum of 3 for both) <br />Fended manifold connection <br />fe <br />8) ! 3 ]laterals 13.0 36.0 feet long perfs / lateral 39 perfs total <br />(1 /2 a perf means the first perf 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 it spacing, Er 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 />) f 1 113 gallons per dose (treatment volume) <br />2.00 5x <br />)2) 2.00 inch diameter Laterals must be used to meet "4x pipe volume" requirement <br />2.00 3x <br />)3) =feet of 2.0 Inch supply line leads to12 gallons ofdrainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />)4) 125 gallons TOTAL pump out volume (treatment + drainback) <br />)s) 16 feet vertical lift from pump to mound laterals, leads to a: <br />6,) 22 GPM C 23 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) <br />17) 500 gal Dose tank (code minimum) 1000 gal Dose tank (design size / LUG req'd) at aEgpi <br />leads to a <br />18) =inch swing on Demand float, or timed dosing of5.7 min ON (confirm pump rate with drawdown <br />(this delivers Average flow, =70% of Peak design flow)Bhrs OFF test and adjust as necessary) <br />ie) F 12 Inches from bottom of tank to "Pump OFF" float <br />10) 17 inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed <br />sit 20 linches from bottom of tank to "Hi Level' float, or 30 inches to "Hi Level" float if time dosed <br />22) 500 gallons reserve capacity (after High Level Alarm is activated) <br />23) 0.45 gpd/ft2 Absorption area Soil Loading Rate, which gives a mound ratio of2.7 (minimum) <br />(this must match the soil boring log) desired mound ratio 2.7 <br />24) =percent site slope (0-20% range) =(% downslope site slope, if different than upslope) <br />25) F12 inches, or 1.0 ft. to Redox or other limiting condition (need at least 12" to be a Type f) <br />Treatment zone contains inches of 0% soil credit, and ®inches of 50% soil credit. Giving a: <br />26) 24 inch, or 2.0 ft. Sand Lift Mound CRITICAL FOR FUTURE C€RTIFICATIONS!II <br />27) 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) <br />281 0.0 ft. upslope and sideslope <br />