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Cover - Hay, a permeable plastic fabric, loamy sand backfill <br />and topsoil shall be used to cover the system as shown in <br />details E3 and E14. <br />Tanks - The capacity of the primary and secondary septic <br />tanks and of the pumping tank are listed in the bill of <br />materials. The grade on the house sewer should be 1 foot <br />per 100 feet. The tank shall be equipped with a pump as <br />specified in the bill of materials. The pump shall be <br />actuated by a mercury float switch, as shown in attached <br />detail F13, that will turn the pump on when 25% of the <br />estimated daily flow plus the drainback quantity of effluent <br />are above the lowest 18 inches in the tank and will turn the <br />pump off when 18 inches of effluent remain in the tank. The <br />pump will be supported on concrete block such that the top <br />of the pump will be just below the lowest 18 inches of <br />effluent in the tank. An alarm will be located at a <br />conspicuous place inside the home and will warn using both <br />light and sound when the effluent reaches 3 inches above the <br />pump turn on level. A reserve capacity as specified, shall <br />be provided in the tank above the alarm actuation level. <br />The details of the pump and pumping tank are illustrated in <br />attached detail F7. <br />If we may be of further assistance in evaluating this data, <br />kindly contact us at your convenience. <br />Sincerely, <br />ADVANCE SURVEYING & ENGINEERING CO. <br />James H. Parker P.E. & L.S. <br />Minn. Lic. No. 9235 <br />PCA No. 208 <br />President <br />Attachments: <br />Design Sheet; Bill of Materials; Details C11, C7, F17, F7, F13, <br />E12, E15, E14, and E3; Boring Logs; Percolation Tests and Site <br />Plan <br />