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� � <br /> . ���,g�Nt '�ov1NDS <br /> �J'{'�l�r� Tt� l���� <br /> SYSTEM DESIGN t�' � ` <br /> '�1 �� 5L�I <br /> FOR DENNIS KUMLIN ��i�,� <br /> OF PROPOSED LOT 2 I� �, <br /> �'�� <br /> 1 , Percolation Rate, Type of System. �� ����F'. �� �� <br /> 7.2 minutes per inch on the primary site. Pres � � o iJ�s . �a <br /> 2. Proposed Flow Rate. ��������� <br /> �ED <br /> 3 bedrooms @ 150 G.P.D. = 450 G.P.D. <br /> 3. Mound Rock Bed Area Needed. <br /> 0.83 factor(using 12" of clean sand under the rock) x 450 G.P.D. <br /> = 375 Sq. Ft. = 10 feet wide by 37.5 feet long. <br /> 4. Dike Width Requirements. <br /> 1 .52 basal width factor x l0� wide rock bed = 15.2 feet minus the 10 foot <br /> bed = 5.2 feet on the downslope side. However, for a 3: 1 slope minimum <br /> needed for a 3 foot high mound on an approximate 8� sideslope on the <br /> downstream side, 12 feet is needed so the 3: 1 requirement controls. _ _ <br /> 5. Septic Tanks. � <br /> Two septic tanks, the first of at least 1000 gallons and the second of <br /> at least 750 gallons are needed. In addition, a third pumping tank is <br /> needed to house the pump needed for pressure distribution. An a�rm device <br /> is also needed to warn of pump failure. <br /> 6. Distribution. <br /> Distribution is to be by pressure through 3 perforated laterals spaced . <br /> 40 inches apart in the rock bed. <br /> 7. Additional Information. <br /> All construction and materials should adhere to the provisions of the <br /> City of Orono. The alternate area must remain undisturbed should it ever <br /> be needed for use. The proposed driveway should be kept to the west as <br /> far as possible and runoff should be diverted from the drainfield area. <br /> If any other information is needed, please contact me. <br /> Sincerely, <br /> PERCOR, INC. <br /> i�L���,4..e�'�a�-['.�2,. . <br /> Mark S. Gronberg � <br /> PCA certified <br />