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COOPERATIVE EXTENSION PROGRAMS <br /> UNIVERSITY OF WISCONSIN-EXTENSION <br /> 1815 UNIVERSITY AVENUE MADISON, WISCONSIN 53706 AREA CODE 608 262-0020 <br /> ENVIRONMENTAL RESOURCES UNIT <br /> September 13, 1976 <br /> Mr. Gary Davis <br /> Deer Run Hts. <br /> Cross Plains, WI <br /> Gary: <br /> In response to your request, I am herein stating my concerns <br /> relative to the potential for ground-water contamination in <br /> the Deer Run Heights Subdivision and surrounding area. My <br /> observations at this time are qualitative only. I have ob- <br /> served limited data. Yet, those data available indicate to <br /> me a potential health hazard that should be investigated in _ <br /> more detail. I feel that present property owners in Deer <br /> Run Heights may have or may incur water quality problems; <br /> additional development in the area could further degrade <br /> ground-water quality. <br /> The basic physical facts of concern include: <br /> 1. A deep water table; 200— feet below ground <br /> surface to the non-pumping water level. <br /> 2. Bedrock wells with shallow casing. <br /> 3. Bedrock predominantly of carbonates (lime- <br /> stone/dolomite) and sandstone; probably with <br /> vertical discontinuities (joints, fractures) . <br /> 4. Low to moderate permeabilities in the bedrock, <br /> which could result in large cones-of-depression <br /> during pumping. <br /> 5. Thin soils over bedrock; the potential for <br /> adequate alteration of contaminants in septic- <br /> tank effluent as the effluent passes through <br /> soil is questionable. <br /> 6. An unknown water table surface configuration. <br /> Is there a water table divide south of your home <br /> that could effectively block northward movement <br /> of septic-tank effluents from proposed land <br /> developments? <br /> UNIVERSITY OF WISCONSIN • U.S. DEPARTMENT OF AGRICULTURE • WISCONSIN COUNTIES COOPERATING <br />