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Z zo Carr aLvt, lavu <br /> ' Westwood Professional Services,Inc. <br /> 104 Marty Drive,Suite 3 <br /> Buffalo,MN 55313 <br /> Phone:612-682-2587 <br /> Fax:612-682-2639 <br /> Toll Free: 1-888-682-2587 <br /> April 21, 1 999 Email:wps@westwoodps.com <br /> Steve Bohl <br /> Bohland Development <br /> 420 Upland Lane <br /> Plymouth, MN 55447 <br /> RE: Septic System Site Plan for Lot 5, Carriage Hill, Orono, Minnesota. <br /> Dear Steve: <br /> This proposed on-site septic system was designed for a 5 bedroom home, with an estimated flow of 750 <br /> gallons per day. Due to mottled soils at a depth of 24" in the primary site, the primary will need to be a <br /> mound system with 12"of sand under the rockbed at the upslope side. The site in which this system is <br /> proposed has a existing ground slope of 6%, and percolation rates ranging from 11-20 MPI. The rock <br /> bed size will be 10 feet wide and 63 feet long with the overall dimensions of the primary mound being <br /> 101.0 feet long and 38.6 feet wide. <br /> An alternate septic system has been shown on the plan to show that there is enough undisturbed area on <br /> the lot to support another septic system. This system will also need to be a mound system. Mottled <br /> soils were found at a depth of 24 inches and the average slope of the area is 4%. This system will not <br /> need to be constructed unless the primary mound fails. <br /> Certain precautions will need to be made to protect the areas in which the above referenced septic <br /> systems are proposed. Both primary and alternate septic areas have been or will be staked off. It is <br /> recommended that safety fence be placed around both of the sites for protection during construction of <br /> this project. It is critical that the soil is not disturbed before, during, and after construction of the <br /> system. <br /> These system should treat the septic effluent effectively if the systems are installed properly and are <br /> maintained properly. It is recommenced that the septic tanks be pumped once every two years. This <br /> will reduce the chance of solids reaching the system. It is also recommended not to use excessive <br /> amounts of chlorine, soaps,and chlorine products which can kill bacteria in the septic tanks. This <br /> bacteria is needed to treat the septic effluent <br /> Designing the Future Today.since 1972 <br />