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l‘ri'1 imiiKiiT Soil ;uKi SiJ^t the <br />* Victoria iTain Co. SuKloTsion in Orono m <br />' ■ •« <br />Medium <br />Green <br />Dark <br />Green <br />b).Dct:th to groi^dwater - The depth to groundwater shall be greater <br />thim 5 to 4 feet if the percolation rate is 60 to 120 minutes <br />per inch and 2 to 3 feet with a percolation rate of 30 to 60 <br />minutes per inch. <br />c). Flood Hazard - There shall be no hazard of flooding within the <br />area considered for installation of the system. <br />d). Slope - Tlie land slope in the area under consideration for in­ <br />stallation of the system shall not be greater than 6%. <br />e).Position on the landscape - The system shall be installed on <br />level areas, on top of rises on convex slopes, on sides of <br />rises or plane. The system shall not be installed in depressions, <br />swales, or drainageways. <br />Information on construction tccliniques and procedures for the <br />mound system may be obtained from the Hennepin Soil and Water <br />Conservation District Office in Wayzata. <br />4. Lester loam - LrB, LrC, LrD: <br />a). Percolation rate - Tlie percolation rate must be faster than 60 <br />minutes per inch. <br />b).E)cpth to groundwater or seasonally saturated horizons - For proper <br />functioning of this system the mihimum depth to groundwater or <br />seasonally saturated conditions shall be more than 3 feet. <br />c). Flooding hazard - There must be no hazard of flooding in the area <br />where these systt'ins are installed. <br />d). Slope - The land slope in the area proposed for the soil absorp <br />tion field shall not be greater than IZi. <br />e). Depth to land rock or otiicr impervious materials - the depth to <br />impervious materials .must be moT'e” than 6 tcct. <br />/Vnother innovative system caii be installed on Lester soils, 'fhis <br />system, the Shallow Subsurface Soil Absorption System, improves the <br />chances of proper functioning. The reciuirenients for this system <br />are as follows: <br />a). Percolation rate - TJic percolation rate must be faster than 60 <br />iiiliiutes per inch. <br />I)e])th to groimdwater - Depth to groundwater or seasonally sat­ <br />urated area must be greater than three feet. <br />This is a well-drained upland soil. Tlie soil is usually never saturated. , <br />In many instances this soil is comjilctely acceptable for the install­ <br />ation of the conventional on-site soil absoi*ption system. 'Hie require­ <br />ments for a system of this type arc as follows: <br />I <br />( ; <br />li