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-J- <br />The area designated for the soil treatment system must consist <br />of a large enough a -ea of a suitable soil to accomodate the entire <br />system. <br />The minimum setback and sizing requirements proposed in IVPC-40 <br />should be observed. <br />Since most of the soils found in this area have a high clay con- <br />tent in the subsoil with accompanying slow permeability all resi- <br />dences constructed should be provided with foundation drains. <br />---------) llayden clay loam - 2 to 6 percent slope, eroded: <br />The map symbol for this soil is HcB2 and the map color is medium <br />green. ]'his is a gently sloping soil occupying irregularly shaped <br />areas on knolls and hillsides. Because this soil is eroded the <br />surface layer is clay loam. The rolling slopes offer attractive <br />building sites. The soil is well -drained and therefore never sat- <br />urated. Sidehill seepage is not uncommon however, are nd basement <br />walls during rainy seasons or spring thaws. Soil strength is ade- <br />quate for residential development. Shrink -swell (volume change) <br />is moderate with changes in moisture content. The soil is moder- <br />ately permeable. Erosion is a hazard when the land is graded and <br />left exposed for extended periods. <br />