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<br />. <br /> <br />. <br /> <br />Secondary <br />Environmental <br />Fac tors <br /> <br />A. Surface <br />Ge ology <br /> <br />B. Surface <br />Wa ter <br /> <br />C. Topography <br /> <br />D. Ground wa te r <br /> <br />- 6 - <br /> <br />STEP 2 <br />~SITE SCREENING <br /> <br />Desirable <br /> <br />Soil types with groundwater <br />table at least 25 feet <br />below surface. <br /> <br />Sites with soils primarily <br />composed of silt and clay, <br />silt loam or clay loam. <br /> <br />Soils with pH greater tha~ <br />6.5. <br /> <br />Cation exchange capacity <br />(CEC) of soil is greater <br />than 15 milliequivalents <br />per 100 grams. <br /> <br />At least 100 feet from a <br />protected wetland. Types <br />III, IV, and V as <br />defined by DNR. <br /> <br />Areas with slopes 0 to 12 <br />percent. <br /> <br />Direction of groundwater <br />to wa rds areas 0 f ex tens ive <br />current or future usage. <br /> <br />Less Desirable <br /> <br />Soil types with <br />watertable within 25 feet <br />of surface. <br /> <br />Sites with soils primarily <br />composed of sand or sandy <br />loam. <br /> <br />Soils with pH less than <br />6.5. <br /> <br />Cation exchange capacity <br />(CEC) of soil is less than <br />15 milliequivalents per <br />100 grams. <br /> <br />On or within 100 feet of <br />a protected wetland. <br />Types I~I, IV, and V as <br />defined by DNR. <br /> <br />Areas with slopes greater <br />than 12 percent. <br /> <br />Direction of groundwater <br />flow towards areas of ex- <br />tensive current or futur~ <br />usage. <br />