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SYSTEM DESIGN <br />FOR GAPY RODERICK <br />OF LOT 5, BLOCK I, RINGERSWOOD <br />1 . Percolation Rate, Type of System <br />35.0 minutes per inch on the primiry site(holes 3-4) and <br />50.0 MPI on the alternate site(hol,�s 1-2). Mound systems. <br />2. Propos'(. Flow Rate. <br />4 bedroims @ 150 G.P.D. = 600 G.P.D. <br />3. Soil T-eatment Area Needed. <br />600 G.P.D. x 0.83 factor = 500 Sq. Ft. of rock bed area, or <br />a bed 10 feet wide by 50 feet long. <br />4. Septic Tanks & Distribution System. <br />Two septic tanks of at least 1000 and 750 gallons, respectively, <br />are needed. In add?tion, a third pumping tank and pump are need- <br />ed for pressure distribution to the mound system. Distribution <br />to the rock bed is to be through 3 perforated laterals 40" apart. <br />All materilas and construction should adhere to the applicable <br />provisions of the city of Orono. <br />5. Mound Dimensions. <br />Since the ground slope is just a little over 3% only the down - <br />slope area can be used for absorption. The required basal width <br />is 2.4 x 10 or 24 feet which means 10 feet for the rock bed and <br />14 feet on the downslope side. With a 4:1 sideslope and a 3 <br />foot high mound, the downslope distance would be 13.2 feet so <br />the use of 14 feet is sufficient. Use 4:1 sideslopes on all <br />other sides. <br />If any other information is needed, please contact me. <br />Sincerely, <br />PERCOR, /INC. <br />Mark S. Gronberg, E. <br />PCA certified <br />