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Groundwater <br /> Groundwater levels from the investigation are artificially low due to site dewatering. Historic <br /> groundwater levels during the due diligence investigation indicate depths of approximately 4 to 6 feet <br /> below the ground surface. The construction of a slope liner will affect groundwater levels with <br /> groundwater mounding anticipated on the upgradient side of the reservoir and a shadow effect(lower <br /> groundwater)anticipated on the downgradient side of the reservoir. The owner should consider the <br /> construction of monitoring wells to monitor groundwater levels. <br /> Lower water levels could potentially affect well owners and other groundwater users. Rising water levels <br /> could affect liner stability and/or basement/subsurface structures. <br /> Limitations <br /> The slope liner design discussed herein is based largely in part on investigations performed by others. <br /> These include widely placed test pits and borings. Conditions will vary between the borings and the test <br /> pits. If at any point the conditions differ from those portrayed herein, Tetra Tech should be contacted to <br /> evaluate the design. <br /> P.\24097\133-24097-14003\Docs\Reports\Design Memorandum\Duckworth Design Memorandum Slope 1-mer.docx <br /> Page 5 of 5 <br />