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Pace -6- Medium Lester loam - 6 to 12 percent slope: Green The map symbol for this soil is LrC and the map color is :,odium green. This is a rolling soil occupying areas on hillsides and knolls. The 70 1 is well - drained and therefore never saturated. However, sidehill seepage is not an uncommon occurrence around basement walls during wet seasons. The rolling slopes and views offer attractive building; sites. Shrink -swell (volume change) is low to moderate with changes in moisture content. The soil is moderately permeable. Erosion is a hazard if this soil is left exposed for extended periods. Dark Marsh: B! The map symbol for this soil is Ma and the map color is dark blue. Ti:c upper S to 10 feet of the marsh is peaty muck or muck. This covers other layers formed in what was formerly a glacial lake. The watertable is near or above the surface the entire year. These soils have very lotiti bearing capacity. The development characteristics of these soils are generally unfavorable. These areas are best used for natural water stor- age and as scenic open space :areas of developiments. I1'. POTEN71AL OF SOILS FOR ON -SITE TREATMEN7 OF SEPTIC TNA EFFLtgXr Within the area of proposed development the soils with the most ncten- tial for on -site treatment of septic tank effluent are the Hayden, Heyder and Lester soils with slopes between 2 to 12 percent. These areas are colored medium green on the accompanying soils overlay. The areas of Glencoe and llamel soils as well as Marsh areas are not suitable for the installation of any soil absorption system. These soils are colored medium and dark blue on the soils overlay. Cordova and Dundas soils colored light blue may be suitable for install- ation of a mound system, but they should be avoided if possible. The Hayden and Lester loam areas with steep slopes colored brown should be left undisturbed. Installing a soil absorption system on such steep slopes would be very difficult. The type of system which will probably ftmctiort best on the Hayden, Heyder and Lester soils is a shallow trench system. In this type of system the trenches are no more than 12 inches deep. This allows the system to utilize the more permeable portion of those soils and insures that a 3 foot separation is maintained between the tx)ttom of the seepage trenches and any seasonal groundwater. 1. hT.'TUN) WAS CLk5SIFILD A5 PtIBLIC h'.1TER.S The wet IMid area adjacent to Long I.Ae will he classified as 1'uhlic Watt.-s '► by the Minnesota elvirtment of tiaturA Resour,es. Any alteration of the