2008-00230 - new septic - Laserfiche WebLink

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fill CITY OF ORONO .,..804OOW Affj *VjMft Soil Testing� SEPTIC ER I I AN "�� $ [NSPE A Box 81 DATE PERMIT NO. Lorretto, Minn. 5535 APPROVEDASSUBMITTED APPROVED WITH CORRECTIONS AS NOTED Ronda Wilson NOT APPROVED.COR*rr / $t18Mli Tel ; 61 2- 8 6 0—01 8 9 ORONO COPY These cwnments are for your Mtbrmf�tigl. AA wwk SIN&be do" is full eotnpiiaaoe with sU applicable septic and=gas cede. Requirements including items not specifically noted isihis sv1 KUP TUTS PLAN SBT ON UM AT ALL?WBS Job Site; 3765 Watertown Rd. , Minn. The current drainfield system was determine to be a failing system according to the current City of Orono Codes. * See the City of Orono records for the details. ORONO Copy A site was tested in the front yard area to determine what type of drainfield could be installed and still comply with the current codes. In the arca that was tested the average percolation rate was 39. 1 min/in. and the depth to mottled soil was at 1 . 8-2. 0 ft. ( 21 -24 inches. Wh-- * Mottled soil is consider the high seasonal saturated soil level that exist during the wet seasons (Spring and Fall ) . The current Orono codes state that when mottled soil is encounter between 12-42 inches then an above ground pressurize mound must be installed, therefore with the above information the only system that can be installed in this area is a pressurized mound system, this system is consider to be a standard system. The size of system needed for a 6 bedroom home would be the following size; Sizing Factors; Daily water use; ; --900 gal/day Perc. Rate Range 46-60 min/in. ( LoamB Clay Loam Soil ) Land Slope--4 % Overall Size 64. 5 ft. long by 71 ft. wide ( 4580 sq. ft. Rock Bed Size; ;Two rock beds each are 10 ft. Wide by 37.5 ft. long or a total of 750 sq. ft. of rock bed Amount of materials needed; Sand--300 yds. , 420 tons Ave. Depth--1 . 5 ft. Rock---28 yds . , 40 tons "--1 . 0 ft. ORONO copy Sandy Loam--100 yds. "--1 . 0 ft. Topsoil--175 yds. "--9-12 inches * The above amounts could vary by 10 % plus or minus. Size of Septic tanks needed; 2-1250 sealedfsealed septic tanks This mound must be pressurized therefore a pump and a pump tank is need3ed; Size of pump tank; ; 1 -1250 gallon sealed tank Size of pump; ; 40 g. p.m ( must overcome 19 . 8 ft. of head presss. ) Pumping Rate; ; 170 gal/cycle ( 6 cycles/day ) * Note; The perforated hole size in the rock bed pipes must be 7/32 inch in size on order for a 40 g. p.m. purpp to be used. Abn alarm system must be installed in the house to indicat pump failute, this must be both a sound and a light alarm system.