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SYSTEM DESIGN <br />FOR FRITZ GULLICKSON <br />OF LOT 2, BLOCK 2, RINGERSWOOD <br />ORONO, MINNESOTA <br />1. Percolation Rate, Type of System. <br />5.4 minutes per inch, Pressure Mound System. <br />2. Proposed Flow Rate. <br />4 bedrooms @ 150 G.P.D. = 600 G.P.D. <br />3. Proposed Rock Bed Area Needed. <br />600 G.P.D. x 0.83 factor for using a minimum of 12" of clean sand under the <br />rock bed = 500 Sq. Ft. or a 10' x 50' rock bed. <br />4. Dike Measurements based on Basal Width. <br />Basal Width ratio = 1.52 x 10' wide bed = 15.2 feet-10 feet for the bed = <br />only 5.2 feet out. However, use minimum sideslope of 4:1 so the mound will <br />have to extend out about 15 feet on each side and about 12 feet at the ends. <br />Since there is over 2 feet o; good black loam soils some minor grading <br />could be done to level the area under the rock bed. <br />5. Septic Tanks. <br />Two septic tanks, of at least 1000 and 750 gallons respectively, are needed <br />in addition to a third pumping tank to house the pump. Also, an alarm system <br />is needed to warn of pump failure. <br />6. Distribution. <br />Distribution is to be by pressure to 3 perforated laterals in the rock bed. <br />These are to be spaced 40" apart. <br />7. Additional Information_ <br />All construction and materials must adhere to the provisions of the City of <br />Orono. All construction traffic must be kept off both the primary and alter- <br />nate sites, and these areas should be marked off to ensure thin. <br />If there are any other questions, please contact me. <br />Sincerely, <br />PERCOR, INC. <br />AMa�r&Se'eo_n5eorg','� PCA certifie <br />