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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />p. ,'-' ... 'H' !) <br />~.... .. ...J...J. <br /> <br />4. RSI systems offer simplicity of operation, low cost to renovate water, reliability, <br />and minimal land requirements. <br /> <br />5. RSI systems also offer an opportunity for underground storage of water by <br />allowing groundwater levels to rise during the winter when irrigation demands are <br />low and pumping the groundwater levels down in the summer when irrigation <br />demands are high. <br /> <br />6. RSI systems attract a variety of birds and other wildlife and offer a unique <br />opportunity (when designed properly, such as with free form lagoons) to combine <br />wastewater management with the goals of a wildlife sanctuary. <br /> <br />7. Forty acres of infiltration basins will handle a city of 100,000 persons with a <br />sewage flow of80 gal/person/day, assuming a hydraulic loading rate of200 <br />feet/year. <br /> <br />8. Assuming 40,000 acre feet per year of effiuent will be renovated pursuant to the <br /> <br /> <br />Barr Lake Plan, the RSI system would occupy an area of approximately 180 acres. <br /> <br />9. The best soils for RSI systems are classified in the sandy loam to loamy sand range. <br />A preliminary soil analysis of several possible RSI location adjacent to Third Creek <br />between Barr Lake and the new airport indicates the soils are in the sandy porous <br />range and not in the clay non-permeable range, which significantly reduces the cost <br />of implementation. <br /> <br />C-7 <br />