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2011 purple code Mound Design <br />Wwmr .^tiPn4irR acne ima r I-- I c ->> <br />Property Owner: Gordon James Date: 7/21/2018 <br />Site Address: 225 Old Crystal Bay Road S. PID: 0411723240002 <br />Comments: Connect to the existing system r,mA, f <br />instructions: = = enter data �� = adjust if desired computer calculated - DO NOT CHANGE! <br />I bedroom Type Residential System <br />1� 750 GPD design flow <br />) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks <br />a 2250 Gal Septic tank (code minimum) 2250 Gal Septic tank (design size / LUG req'd) <br />Tank options: none <br />1.2 GPD/ft2 mound sand loading rate contour loading rate of 12 req's a min 62.5 ft. long rockbed <br />61 10.0 ft rockbed width =ft rockbed length <br />7 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) <br />Lend feed manifold connection <br />8; laterals 60.5 feet long 21.0 perfs / lateral 63 perfs total <br />(1 /2 a perf means the first perf starts at the middle feed manifold) <br />Q =inch inch perfs at feet residual head gives 0.74 gpm flow rate per perforation <br />for this perf size & spacing, €t pipe size on line 12, max perfs/lateral = 25 line #8 must be less OK <br />doses per day (4 minimum) <br />e i 188 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 />i;; 85 feet of 2.0 inch supply tine leads to 14 gallons of drainback volume <br />(Tip: "top feed" manifold to control the drainback) <br />1-E) 202 gallons TOTAL pump out volume (treatment + drainback) <br />s 9 feet vertical lift from pump to mound laterals, leads to a: <br />ic„ 47 GPM @ 20 feet of head, Pump requirement (nate: >50gpm may require an extra 3-6' of head) <br />i ri 750 gal Dose tank (code minimum) 7250 gal Dose tank (design size / LUG req'd) at 25.49 gpi <br />leads to a <br />is 7.9 inch swing on Demand float, or timed dosing of4.3 min ON (confirm pump rate with drawdown <br />(this delivers Average flow, =70% of Peak design flow)Mhrs OFF test and adjust as necessary) <br />inches from bottom of tank to "Pump OFF' float <br />20 inches from bottom of tank to "Pump ON" float, orM33 <br />inches to "Timer ON" float if time dosed <br />s 23 inches from bottom of tank to "Hi Level" float, or inches to "Hi Level" float if time dosed <br />-, 664 gallons reserve capacity (after High Level Alarm is activated) <br />